B8 GeniE Pile Soil Analysis

53
DET NORSKE VERITAS 1 SESAM Structure, pile, soil and DNV Software Genie Jacket Integrated Analysis Revised 6 September 2011 wave analysis in GeniE SESAM User Course in integrated design analysis of jackets Genie Workshop: Model and analyse the jacket when subjected to wave loads The purpose of this workshop is to guide the user in how to model a small 4-legged jacket with a simplified topside structure on top. The jacket is fixed with 4 piles for a given environment condition (the soil layers). Furthermore, the analysis also assumes a given wave load condition. The workshop also addresses how to perform the integrated analysis including both the hydrodynamic analysis (running Wajac in the background), the non-linear pile-soil analysis (running Splice in the background) and finally the structure analysis using Sestra (also in the background). Details on how to transfer data to Framework for code checking is also covered at the end of the workshop. The objectives of this workshop is thus to steer the user through one way of doing integrated analysis. Other workshops focus more details on modelling aspects. The workshop is accompanied with a pre- defined journal file. This file may be read into GeniE to recreate the same model as described herein. The journal file contains comments so it is easy to understand which commands create which parts of the model. Part 0 - General This workshop should be viewed on-line or on colour print out to best see the property colour coding. It is required that you have the following programs in addition to GeniE: Wajac, Splice, and Sestra. You should also have the program versions (or later) as found on the Sesam Download per March 2011 and the GeniE D6.0-00 (or later). A picture of the complete model one wave load condition is shown

description

Pile Soil Analysis

Transcript of B8 GeniE Pile Soil Analysis

Page 1: B8 GeniE Pile Soil Analysis

DET NORSKE VERITAS 1

SESAM Structure, pile, soil and

DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

SESAM User Course in integrated design analysis of jackets

Genie Workshop:

Model and analyse the jacket when subjected to wave loads

• The purpose of this workshop is to guide the

user in how to model a small 4-legged jacket

with a simplified topside structure on top. The

jacket is fixed with 4 piles for a given

environment condition (the soil layers).

Furthermore, the analysis also assumes a given

wave load condition.

• The workshop also addresses how to perform

the integrated analysis including both the

hydrodynamic analysis (running Wajac in the

background), the non-linear pile-soil analysis

(running Splice in the background) and finally

the structure analysis using Sestra (also in the

background).

• Details on how to transfer data to Framework

for code checking is also covered at the end of

the workshop.

• The objectives of this workshop is thus to steer

the user through one way of doing integrated

analysis. Other workshops focus more details

on modelling aspects.

• The workshop is accompanied with a pre-

defined journal file. This file may be read into

GeniE to recreate the same model as described

herein. The journal file contains comments so it

is easy to understand which commands create

which parts of the model.

Part 0 - General

• This workshop should be viewed on-line or on colour print out to best see the property

colour coding.

• It is required that you have the following programs in addition to GeniE: Wajac, Splice, and

Sestra. You should also have the program versions (or later) as found on the Sesam

Download per March 2011 and the GeniE D6.0-00 (or later).

A picture of the complete model –

one wave load condition is shown

Page 2: B8 GeniE Pile Soil Analysis

DET NORSKE VERITAS 2

SESAM Structure, pile, soil and

DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Please note:

• The pictures created by Genie are shown using

either a white background

(View|Options|General|Paper Background) or a

screen based background. These may be different

from your background.

• Any of the structures are fictitious.

• Any of the names referred to assumes

import of the pre-defined journal file. Depending on

how you model, the naming may be different. This

has no impact to the usefulness of the model.

• For further details on the commands, pulldown

menus etc. used in this tutorial:

Part 2, see Vol. 1 of the User Manual

Part 3-6, see Vol. 2 of the User Manual

Part 0 - General

Content of workshop:

• Part 1: Describes the main dimensions for the

jacket and deck, pile types, soil properties,

sections and materials and the wave loads

• Part 2: Gives hints on how to make the structure

• Part 3: Focuses on pile and soil modelling

• Part 4: The wave loads are modelled

• Part 5: Making basic loadcases and load

combinations

• Part 6: The integrated analysis is run

• Part 7: Some examples on how to present results

in GeniE

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SESAM Structure, pile, soil and

DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Main dimensions

• Main units are in meters, KN and

tonne – there is one material type

(see bottom of this page for details)

• The main dimensions of the jacket

is shown to the right.

• The jacket has 4 legs

• Notice the cone transition just

above elevation +75 meters

• The sections, thicknesses and

materials used are listed below

• A total of 7200 tonnes is distributed

as point masses on the topside

0

5

40

75

105

143 138

135

45 35

20

15

80

Cone

length

= 3

Part 1 - Dimensions

Name Diameter Thickness

Pipe06 0.6 0.01

Pipe12 1.2 0.03

Pipe16 1.6 0.03

Pipe21 2.1 0.08

Pipe22 2.2 0.08

Pipe32 3.2 0.09

Name Yield Density Young Poisson Thermal Damping

Steel 3.56E5 7.85 2.1E8 0.3 1.2E-5 0

Name Thickness

Th2 0.02

Th4 0.04

Th6 0.06

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Pile details

• There are 4 piles

• Each pile extends from elevation -

100meters to bottom of leg at

elevation 0 meters

• The pile may very well be extended

above elevation +0 meters, i.e. to

be an inner pile of the leg.

Part 1 - Dimensions

Sublayers

1

1

1

3

15

3

0 -1.5

-14.5

-5.5 -3.5

-70

-100

-75

Pile diameter = 2.1 m

thickness = 0.08 m

Leg

Pile

Typ

e

Den

sity

of m

atte

r

insid

e p

ile

Pile

tip is

free

/fixe

d?

PileType1 1 *

*: Pile is assumed to be

infinitely long beneath the tip

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SESAM Structure, pile, soil and

DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Soil details

Part 1 - Dimensions

Soil Type Soil Data

Sand1 SoilData1

Sand1 SoilData2

Sand2 SoilData3

Clay3 SoilData4

Clay4 SoilData5

Sand5 SoilData6

0 -1.5

-14.5

-5.5 -3.5

-70

-100

-75

Pile

So

il Typ

e

An

gle

inte

rna

l

frictio

n

De

nsity

Op

en

ga

p?

Ove

r-co

nso

lida

tion

ratio

Resid

ua

l/peak

skin

frictio

n ra

tio

Sand1 40 1.99 No 1 1

Sand2 36 1.99 No 1 1

Sand5 37 2.04 No 1 1

So

il Typ

e

Su

z1

(0)

Su

z2

(10

0)

Den

sity

Stra

in a

t ha

lf ma

x

stre

ss

J-fa

cto

r

Op

en

ga

p?

Ove

r-co

nso

lida

tion

ratio

Resid

ua

l/peak

skin

frictio

n ra

tio

Clay3 200 100 1.94 0.01 0.5 No 1 1

Clay4 300 130 1.94 0.01 0.5 No 1 1

• Soil types - sand

• Soil types – clay

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Soil details

• Soil curves:

p-y according to API 1987

t-z according to API 1993

q-z according to API 1993

• Scour

General scour = 0.5

Local scour around piles = 1

Slope of local scour = 20

• Soil data (skin friction and tip

resistance) as given below

Part 1 - Dimensions

So

il Data

Initia

l va

lue

of s

oil s

he

ar

mo

du

lus

So

il Po

isson

ratio

Skin friction Tip resistance

Pe

ak s

kin

frictio

n in

co

mp

ressio

n

Pe

ak s

kin

frictio

n in

ten

sio

n

Ratio

be

tw. d

ispl. to

rea

ch

pe

ak s

kin

frictio

n a

nd

pile

dia

m.

Pe

ak tip

stre

ss

Ratio

be

tw. d

ispl. to

rea

ch

pe

ak tip

stre

ss

an

d p

ile d

iam

.

SoilData1 -1 0.5 5 3 0.01 - -

SoilData2 -1 0.5 15 11 0.01 - -

SoilData3 -1 0.5 45 45 0.01 - -

SoilData4 -1 0.5 200 200 0.01 - -

SoilData5 -1 0.5 250 250 0.01 - -

SoilData6 -1 0.5 120 120 0.01 30000 0.05

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Wave & wind load details

• Still water level at +124 meters

• Current always along with all wave

headings

• The waves to be used (for all loadcases calculate

maximum base shear and overturning moment)

• The marine growth (to be added to inertia force)

• Wind loads

Apply on topside constant wind force North 5 KPa (negative y-direction),

East 7 KPa (negative x-direction), South 6 KPa (positive y-direction),

North 9 KPa (positive X-direction)

• Make load combinations whereby all wave loads have factor 1.6, buoyancy has

factor 1.0, Gravity has factor 1,2 and wind loads have factor 1.6.

Part 1 - Dimensions

Sea Elevation Velocity

+30 m 1.1 m/s

0 m 1.1 m/s

-44 m 0.5 m/s

-124 m 0.5 m/s

Period (sec) Wave height (m) Phase (deg) Direction (deg) Wave theory

14 s 26 m -60 deg 270 deg (North) Airy

12 s 15 m -60 deg 180 deg (East) Stokes5

14 s 28 m -60 deg 90 deg (South) Stokes5

15 s 27 m -60 deg 0 deg (West) Stokes5

Calm Sea

Elevation Thickness (m) Roughness height (m) Density factor

0 m 0.1 m 0 1

-24 m 0.1 m 0 1

-124 m 0.01 m 0 1

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Revised 6 September 2011

wave analysis in GeniE

Step 1: Define sections and

material

• Start GeniE and open new

workspace (Ctrl+N) with units:

m and kN (and hence tonne)

• Create pipe sections:

Edit > Properties

in Section tab click

and create sections:

• Create thicknesses: Edit >

Properties, in Material tab click

and create thicknesses:

• Create material in similar way:

Part 2 – Modelling the structure

Name Diameter Thickness

Pipe06 0.6 0.01

Pipe12 1.2 0.03

Pipe16 1.6 0.03

Pipe21 2.1 0.08

Pipe22 2.2 0.08

Pipe32 3.2 0.09

Name Yield Density Young Poisson Thermal Damping

Steel 3.56E5 7.85 2.1E8 0.3 1.2E-5 0

Name Thickness

Th2 0.02

Th4 0.04

Th6 0.06

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Revised 6 September 2011

wave analysis in GeniE

Step 2: Define guideplanes at

top and bottom elevations

• Insert guiding planes at bottom and top

of legs:

Guiding Geometry|Planes| Guide Plane

Dialog

Plane at top og legs (LegTop) at

Z coordinate 138 with X and Y

spanning from (-10,-7.5) to

(10,7.5) Use 1 for spacings in x

and y

Plane at bottom of legs

(LegBottom) at Z coordinate 0

with X and Y spanning from

(-22.5,-17.5) to (22.5,17.5)

Use 1 for spacings in x and y

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 3: Model the main legs

• In upper right area of GUI set defaults:

Section: Pipe32

Material: Steel

Like this:

• Create the 4 legs:

Insert|Beam|Straight Beam

(or press in the upper left of

the GUI)

Click lower and upper ends of

each leg

(notice highlighting of the snap

point)

• With ‘Default display’

(upper middle area of GUI)

the model is displayed

as shown to the right

Guiding planes are no longer

needed so change display type

to ‘Modelling - Structure’

Part 2 – Modelling the structure

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SESAM Structure, pile, soil and

DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 4: Using the journal file

• When modelling, GeniE will

automatically create a JavaScript log

(the journal file or the js-file).

• Notice the JavaScript log of commands

in the lower area of GUI:

• This log is also found in a file named

workspace-name.js

You may edit this file and use it

as a Command File in a new

session (File|Read Command

File)

• Alternatively to clicking menus and

buttons you may type commands.

Having typed a couple of characters hit

Tab key to get box with alternatives.

Help is provided as you continue

typing.

• The log file contains all actions you

perform. If you want a journal file

without any history (a “clean journal

file”) you may create such file by

File|Export|Genie journal file (JS file).

This file is ideal for backup

purposes and also when

recreating the model using

newer program versions of

GeniE.

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 5: Make the lowest horizontal

elevation

• Add elevations for bracings by using

Snap Plane:

Change Snap Perpendicular to

Snap Plane

Press Snap Plane

Give Z-coordinate of lowest

elevation

• Set default section to Pipe16:

• Use snap points at intersection

between legs

and Snap Plane to create horizontal

bracing

• Close Snap Plane dialog and create

horizontal X-bracing

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 6: Make the lowest elevations

• Create each diagonal bracing from

elevation 5 to 40 as follows:

Press beam button

and click

lower end (1)

Press Snap Plane and give Z =

40

Click upper end (2) and beam

appears

• Continue this process to create all X-

bracing (all with Pipe16) between

elevations 5 and 40 as well as between

elevations 40 and 75

• In this process open and close Snap

Plane when necessary

• Create horiz. X-bracing at elevations

40 and 75

• Model at this stage:

Part 2 – Modelling the structure

Elev. 5

Elev. 40

Elev. 75

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Revised 6 September 2011

wave analysis in GeniE

Step 7: Make the upper elevations

• Set default section to Pipe12

• Use Snap Plane first at elevation 105

and then at 135 to create horizontal

bracing

• Close Snap Plane and create all X-

bracing between 75 and 105 and

between 105 and 135

• Create T-bracing between 105 and 135:

Change Snap Plane to

Snap Perpendicular

Press Snap Perpendicular

Click X-joint (end 1) and see

midpoint of horizontal bracing

highlighted as end 2:

Model at this stage

Lift Snap Perpendicular

Part 2 – Modelling the structure

Snap Plane

intersects leg

Elev. 75

Elev. 105

Elev. 135

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 8: Change the upper leg

• Change section for legs by segmented

modelling

Double-click a leg

Select and use RMB to Divide

At 80 m

Select upper segment and

Divide At 3 m

Select upper segment and use

RMB and Properties to change

section from Pipe32 to Pipe22

Create a cone section in same

way as for other sections and

assign this to short middle

segment

Repeat for other legs

Part 2 – Modelling the structure

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SESAM Structure, pile, soil and

DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 9: Complete the jacket

structure

• Set default section to Pipe16

• Create horizontal X-bracing at

elevations 105 and 135

• Change default section to Pipe22

• Create vertical stub at top of leg:

Insert|Beam|Straight Beam

Dialog

Click in End 1 field to put focus

there

Click top of leg to insert this

point in End 1

Repeat for End 2

(or cut and pasted from End1

field)

Adjust End 2 by adding 5 m to

Z-coord.

Click OK to create stub

• Copy stub to other three leg tops

Select the vertical stub

Use RMB and Copy

Click Translation vector field

Click from-to points to

insert proper vector

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 10: Make the conductors

• Set default section to Pipe16

• Use Snap Plane Y=3 to

create conductor support

• Copy the conductor support to all

elevations

Use X-joints as from-to points

to insert proper vertical

Translation vector in Copy

dialog

Part 2 – Modelling the structure

Horizontal X-bracings

only shown

‘From-point’

and ‘to-point’

gives vertical vector:

Vector3d(0 m,0 m,-30 m)

that creates proper copy

Snap Plane

intersects

X-bracing

Copy

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 10: Make the conductors

• Set default section to Pipe06

• Create first conductor:

Insert|Beam|Straight Beam

Dialog

Give data:

• Copy first conductor 2m in X-dirextion

twice:

Use Preview to confirm

before Apply

(You may also specify this as

default appearance from

View|Options|General)

Part 2 – Modelling the structure

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SESAM Structure, pile, soil and

DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 10: Make the conductors

• Conductors contribute with hydrodynamic forces but no stiffness:

Edit|Properties, Beam Type tab, click Create/Edit Beam Type, Nonstructural

tab, create a non-structural beam type (name only with no data)

Select the three conductors

In Properties > Beam types folder select non-structural beam type name and

use RMB to Apply Beam type to selection

• The bottom part of the conductors need to be supported in order to avoid

singularity in analysis

You use Insert|Support|Support Point Dialoge

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 11: Make the topside

• Create lower deck (Th6):

Insert|Plate|Flat Plate Dialog

Give coordinates

for 4 corner points:

» Click 1st entry

» Click points 1, 2, 3 and 4

» Click twice to edit entries, X-values as shown

Click Apply

Part 2 – Modelling the structure

4th corner point

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 11: Make the topside

• Copy lower deck twice:

9 m up (middle deck) and 17 m

up (upper deck)

• Create wall (Th4) in YZ plane:

Insert|Plate|Flat Plate

(or press in the

upper left of the GUI)

Click 4 corner points:

• Copy first vertical wall three times

• Create wall (Th2) in XZ plane

where conductors hit lower deck

Part 2 – Modelling the structure

1 2

3 4

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wave analysis in GeniE

Step 11: Distribute the additional

topside mass

• This tutorial assumes distribution of

additional masses by means of point

masses.

• You insert the mass points by using

Insert|Mass

Click in the position field first

before you click on the position

on the model

• The rest of the point masses are added:

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

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wave analysis in GeniE

Step 11: Make sets for use in

hydrodynamic modelling and

code checking

• Select graphically the relevant parts,

RMB > Named Sets and make named

sets for

Jacket

Legs

Topside

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 11: Control the mesh of the

topside

• GeniE will produce a default mesh of

the topside

Notice the node positions where

the conductors are connected

• You may decide to control it by using

Feature Edges

Insert|Feature Edge

• One way of doing it is as shown below

This is not necessary, but it

gives you an idea on how to

control the mesh

Click in the first input field and

then on the model where the

conductor intersect the bottom

plate. Subtract -10.5 meters in

the y-direction

Do the same for input field

number 2, but add 4.5 meters in

the y-direction

Copy the feature edge (select,

RMB, and copy) to the other

conductor intersections

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 11: Control the mesh of the

topside

• Copy feature edges Fedge1-3 to the

decks above

• Add vertical feature edges as shown

• The finite element mesh now becomes

The yellow dots indicate point

masses on the FE model

Part 2 – Modelling the structure

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 12: Define the piles

• Piles are basically the same as beamS, but they

need additional information – “pile

characteristics”

• Select Edit|Properties > Pile Characteristics,

define the PileType1 and give the input data as

shown

• You may change the properties from the browser

as shown (select PileType1 and RMB)

Part 3 – Modelling the pile & soil

Pile

Typ

e

Den

sity

of m

atte

r

insid

e p

ile

Pile

tip is

free

/fixe

d?

PileType1 1 *

*: Pile is assumed to be

infinitely long beneath the tip

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 12: Define the piles

• Set section Pipe21 to default

• Switch modelling mode from beams to piles

• Make the first pile by the following sequence:

Click on the start point, in this case the

bottom part of the leg

GeniE will then ask you for the lower z-

elevation of the pile, please enter -75

meters

GeniE now expects you to define the

orientation of the pile. You move the

mouse over the beam as shown and when

clicking GeniE inserts the pile in it’s

correct position

» Notice the colour of the beam when moving the mouse over it.

• Select Pile1 and apply the PileType1 to it

• Define piles Pile2-4 in the 3 other corners by

following the same procedure as described

above.

Part 3 – Modelling the pile & soil

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wave analysis in GeniE

Step 12: Define the piles

• At this stage the model looks like

The section types are colour coded

View|Options > Colour Coding >

Category > Property

name > section

palette > default

Check the Enable color coding button:

Part 3 – Modelling the pile & soil

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wave analysis in GeniE

Step 13: Define the soil data

• Define the scour. Open the Environment tab in

the browser, select Soil, RMB and select New

Scour. The data are as follows

Scour

» General scour = 0.5

» Local scour around piles = 1

» Slope of local scour = 20

• Define sand types

Sand1, Sand2, Sand5

Select New Sand as shown above

Part 3 – Modelling the pile & soil

So

il Typ

e

An

gle

inte

rna

l

frictio

n

Den

sity

Op

en

ga

p?

Ove

r-co

nso

lida

tion

ratio

Resid

ua

l/peak

skin

frictio

n ra

tio

Sand1 40 1.99 No 1 1

Sand2 36 1.99 No 1 1

Sand5 37 2.04 No 1 1

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 13: Define the soil data

• Define clay types

Clay3 and Clay4

Select New Clay as shown

on previous page

• Define the soil curve

p-y according to API 1987

t-z according to API 1993

q-z according to API 1993

Select New Soil Curve as

shown on previous page

Part 3 – Modelling the pile & soil

So

il Typ

e

Su

z1

(0)

Su

z2

(10

0)

Den

sity

Stra

in a

t ha

lf ma

x

stre

ss

J-fa

cto

r

Op

en

ga

p?

Ove

r-co

nso

lida

tion

ratio

Resid

ua

l/peak

skin

frictio

n ra

tio

Clay3 200 100 1.94 0.01 0.5 No 1 1

Clay4 300 130 1.94 0.01 0.5 No 1 1

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 13: Define the soil data

• Define the soil data

The parameters for

SoilData1-6 are shown

below

Select New Soil Data

as shown on previous

page

• From the browser you have access to all

the soil parameters

You may change, rename, delete

and do graphical manipulations

like e.g. colour coding

Part 3 – Modelling the pile & soil

So

il Data

Initia

l va

lue

of s

oil s

he

ar

mo

du

lus

So

il Po

isson

ratio

Skin friction Tip resistance

Pe

ak s

kin

frictio

n in

co

mp

ressio

n

Pe

ak s

kin

frictio

n in

ten

sio

n

Ratio

be

tw. d

ispl. to

rea

ch

pe

ak s

kin

frictio

n a

nd

pile

dia

m.

Pe

ak tip

stre

ss

Ratio

be

tw. d

ispl. to

rea

ch

pe

ak tip

stre

ss

an

d p

ile d

iam

.

SoilData1 -1 0.5 5 3 0.01 - 0.05

SoilData2 -1 0.5 15 11 0.01 - 0.05

SoilData3 -1 0.5 45 45 0.01 - 0.05

SoilData4 -1 0.5 200 200 0.01 - 0.05

SoilData5 -1 0.5 250 250 0.01 - 0.05

SoilData6 -1 0.5 120 120 0.01 30000 0.05

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 14: Define a location

• All the environmental data (air, soil, water)

needs to be assembled in a location

The location is defined by selecting

Environment and RMB.

The location name in this tutorial is

Location1.

• Air data: Use the default values provided by the

program. There will be no wind load

calculations.

Notice the on-line help function

• Water data: Use the default

values provided by the

program and use waterline

at elevation +124 m.

Part 3 – Modelling the pile & soil

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 14: Define a location

• The soil data lists the connection

between soil type, soil curves

and soil data.

Part 3 – Modelling the pile & soil

0 -1.5

-14.5

-5.5 -3.5

-70

-100

-75

Pile

Soil Type Soil Data Sublayers

Sand1 SoilData1 1

Sand1 SoilData2 1

Sand2 SoilData3 1

Clay3 SoilData4 3

Clay4 SoilData5 15

Sand5 SoilData6 3

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 14: Define a location

• The model now contains data for structure, pile

and the soil.

The soil is shown with colour codes

• You may change the data by selecting

Location1, RMB

Part 3 – Modelling the pile & soil

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 15: Define the

hydrodynamics

• The following data will be defined

Current

Wave sets

Wave load conditions

Morison coefficients

Marine growth

Flooding parameters

• Notice that the data pertaining to the

structure is defined from Property >

Hydro browser, while the remaining

data are given from Environment >

Water browser. Use RMB in both

cases.

• Define the current CurrentProfile1

From browser Environment >

Water > New Current profile

The details are listed in Part 1

– Wave load details

Part 4 – Modelling the wave data

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 15: Define the

hydrodynamics

• Define the wave set WaveSet1

From browser Environment >

Location and then choose

water

The details are listed in Part 1

– Wave load details

Part 4 – Modelling the wave data

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 15: Define the

hydrodynamics

• Define the wave load condition

Condition1

From browser Environment >

Location1 > New Wave Load

Condition

The details are listed in Part 1

– Wave load details

Part 4 – Modelling the wave data

When selecting Waveset1

all data are filled in

Notice pulldown –

click the cell to access this feature

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 16: Define hydro properties

applied to structure

• Define the Morison Coefficients

and apply to the jacket

From browser

Properties > Hydro >

Morison

Use default values

• Apply to named set

Jacket

Select the Jacket from

browser Utilities < Sets

Select the Morison coefficient

from browser Properties >

Hydro and apply to selection

Part 4 – Modelling the wave data

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 16: Define hydro properties

applied to structure

• Define the marine growth parameters

and apply to complete jacket

From browser

Properties > Hydro >

Marine growth

Use full flooding

Use same procedure as

shown on previous

page to apply to the

named set Jacket

Part 4 – Modelling the wave data

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 16: Define hydro properties

applied to structure

• Define the Flooding parameters

Flooding1 and apply to the named set

Legs1

From browser

Properties > Hydro >

New Flooding

Use full flooding

Use same procedure as

shown on previous

page to apply to the

named set Legs

• You may change the settings from the

browser Properties > Hydro

Part 4 – Modelling the wave data

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 17: Define basic loadcases

• This model contains both basic

loadcases (manually applied), those

automatically created from the wave

load analysis and the load

combinations

• There are in total 4 basic loadcases

describing static wind loads and a

gravity loadcase

Gravity

WindN – pressure 5 KPa

WindE – pressure 7 KPa

WindS – pressure 6 KPa

WindW – pressure 9 KPa

• Insert a loadcase by defining the

loadcase and apply properties to it

• For the wind load cases the pressure

intensities are applied as shown on

next page. Before applying the

pressure loads, make sure you make

the right loadcase to be the current

loadcase

Example shows setting WindN

as current

Part 5 – Making the load cases

Select, RMB and choose Properties

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 17: Define basic loadcases

• Add pressure load to loadcase WindN

Set loadcase WindN to current

Insert|Explicit Load|Surface

Load

Specify Normal pressure 5 KPa

Define explicit load name

Wind1

Notice the direction of pressure

load according to the right

hand rule

Click at first corner point

coordinate

Then click on actual point in

model (1) below

Continue with points 2, 3 and 4

Click OK

• To verify the load select loadcase

WindN from browser, RMB and

properties

Total force is Fy = -4080 KN

More details may be found

under the tab Loads

Part 5 – Making the load cases

1

2

3

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 17: Define basic loadcases

• Add pressure load to loadcase WindE,

WindS, WindW as follows

Part 5 – Making the load cases

WindE, Fx= - 1785 KN

WindS, Fy= 4896 KN

WindW, Fx= 2295 KN

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 18: Make an analysis activity

• Prior to making the wave load cases it

is necessary to define and activity

Select Activities from browser,

RMB and New Analysis

Specify the name Analysis1

and make sure you tick off

Wave Load Activity and

Pile Soil Analysis.

You are also prompted to

specify which wave load

condition to run

This predefined workflow

process will do all the

necessary steps to perform an

integrated structure – wave –

pile – soil analysis

Before the analysis can be run

it is necessary to add some

control data for the wave load

run.

Select the Wave Load Analysis

as shown to the right

Fill in the whole table as

shown on next page by

clicking Fill all

Part 5 – Making the load cases

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 19: Define the wave load run

• Change details for step length, number of steps

Part 5 – Making the load cases

• A total of 9 wave load cases will be generated

Direction 270 deg WLC1 & 2 (max shear and moment respectively, north direction)

Direction 180 deg WLC3 & 4 (max shear and moment respectively, east direction)

Direction 90 deg WLC 5 & 6 (max shear and moment respectively, south direction)

Direction 0 deg WLC 7 & 8 (max shear and moment respectively, west direction)

Calm sea WLC9

and how many loadcases to be

exported to the structural

analysis

buoyancy calculations

only for calm sea

no design loads

for calm sea

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 20: Make load combinations

• The load combinations are made as combinations from the various basic and

wave load cases, the table below explains the combinations

• You define a loadcombination from Insert|Load Combination

GeniE assumes that all

loadcases are part of a

loadcombination

To deselect simply click in

the right fields

To change the loadfactor

doubleclick the actual

load case

To verify, select the load

combination from browser

Analysis > Loadcases >

NorthMaxShear > RMB

and Properties

Part 5 – Making the load cases

Load

combination

Wave

load

Load

factor

Buoyancy

load

Load

factor

Gravity

load

Load

factor

Wind

load

Load

factor

NorthMaxShear WLC1 1.6 WLC9 1.0 Gravity 1.2 WindN 1.6

NorthMaxMom WLC2 1.6 WLC9 1.0 Gravity 1.2 WindN 1.6

EastMaxShear WLC3 1.6 WLC9 1.0 Gravity 1.2 WindE 1.6

EastMaxMom WLC4 1.6 WLC9 1.0 Gravity 1.2 WindE 1.6

SouthMaxShear WLC5 1.6 WLC9 1.0 Gravity 1.2 WindS 1.6

SouthMaxShear WLC6 1.6 WLC9 1.0 Gravity 1.2 WindS 1.6

WestMaxShear WLC7 1.6 WLC9 1.0 Gravity 1.2 WindW 1.6

WestMaxMom WLC8 1.6 WLC9 1.0 Gravity 1.2 WindW 1.6

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 21: Start the analysis

• The analysis is started from the Tools|Analysis|Activity Monitor or by Alt+D

If you do not want to run the compete workflow, simply deselect the

actual activity

• During execution, GeniE will tell you what the status is

Part 6 – Run the analysis

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 21: Start the analysis

• When the analysis is done it is easy for you to verify the details of each

analysis run

Select the relevant activity, RMB and decide which information you will

investigate

The example below shows how to look at the results from the pile

analysis as well as the final retracking

Part 6 – Run the analysis

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 22: Present results

• You may present results for displacements, stresses or beam forces (and

moments) directly on the concepts from inside GeniE.

Make sure analysis was successfully run

Use a pre-defined view for results presentation

(or a view defined by yourself from ALT+O).

» Use Results - All or Results - with Mesh

• You select type of results attribute to show from

Tools|Analysis|Presentation or ALT+P

The example below shows that displacements is set to default

presentation for this model using contour plotting and showing

deformed shape.

Part 7 – Present results

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 22: Present results

• In the example below results attribute is set to bending moment

Mxy. Furthermore, the results are shown using contour plot.

• In the below case, a 3D option is used

Part 7 – Present results

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 22: Present results

• The bending moment is shown with a diagram

• The bending moment is shown for beams at elevation +105 meters.

Tip select these beams from a structure view, Alt+S (Show selection

only), then go to view Results – with Mesh and click update

You add numerical values by

Part 7 – Present results

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 23: Present results

• You may also use the 2D graphing tool to present results

• In this example the shear force and bending moment are shown for one of the

main legs

Part 7 – Present results

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DNV Software – Genie Jacket Integrated Analysis

Revised 6 September 2011

wave analysis in GeniE

Step 24: Code checking

• The code checking of members and tubular joints is also done in GeniE. See

one of the other tutorials how to perform and report code check results

• Below is an example of code checking results

Part 7 – Present results