Norwegian Public Roads Administration - vegvesen

ROBUSTComputational Mechanics

Results and Comparison

Workshop in Brussels 30.05.2006

Kristin Johannessen Force Technology

Norwegian Public RoadsAdministration

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Workshop, Brussels May 2006

Vehicle models

Light vehicle model:• GeoMetro R0 – Original, downloaded from NCAC and

improved by NPRA, SNRA, Force• GeoMetro R1 – Included spinning wheels by POMI• GeoMetro R2 – R1 + seats, seatbelts and gebod by

NPRA/Force• GeoMetro R3 – R1 + steering and suspensions by POMI• GeoMetro R4 – R3 + seats, seatbelts and gebod by

NPRA/Force• Generic (Fiesta) – Developed by TRL

Bus Model (13t) – based on Scania and modified by NPRA, SNRA, Force

10t Heavy weight vehicle model – developed by POMI

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Barriers

10t lorry_R1VarioGuard - H2B3GM_R3 and GM_R4Super-rail® plus - H3B2

BusVarioGuard - H2B3

GM_R2 and GM_R3ESP - N2B1GM_R1Concrete barrierB5Vehicle model for impactDescription of barrierBarrier

All barriers delivered by Volkmann & Rossback GMBH & CO.KG, as Robust partner

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Steel ESP N2 (Barrier B1)

Barrier delivered by Volkmann & Rossback GMBH & CO.KG, as Robust partner (picture from TRL)

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ESP N2 – Input parameters

• Versions of GM• Impact speed• Vehicle test mass• Barrier boundaries (foundation, ends)• Material data• Friction (wheel asphalt)

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ESP N2 - Results

ASI

0,00

0,10

0,20

0,30

0,40

0,50

0,60

0,70

0,80

0,90

POMI (LS-DYNA) TRL (LS-DYNA) NPRA (LS-DYNA)

ASI

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ESP N2 - Results

ASI

0

0,1

0,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9


ASIStd. Dev: 0,07Mean: 0,8

Comparable simulations; fixed at ground level -180mm

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ESP N2 - Results

Working Width and Deflection

0

100

200

300

400

500

600

700

800

900


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Measurement of W

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ESP N2 - Results

Working Width and Deflection

0

100

200

300

400

500

600

700

800

900


W: Std. Dev: 33Mean: 787

D: Std.dev: 69Mean: 679

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ESP N2 - Results

ASI

0,00

0,10

0,20

0,30

0,40

0,50

0,60

0,70

0,80

0,90

TRL - Case 1 NPRA - Case4

NPRA - Case1

POMI - Case 2

GM_R2GM_R4

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ESP N2 - Results

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ESP N2 – Comparison full-scale test

ASI - Working width

0,50,55

0,60,65

0,70,75

0,80,85

0,90,95

600 700 800 900 1000Working w idth

ASI

Full scale_Soil Simulation_spring Full scale_Asph-BetSimulation_+30 Simulation_-200

ASI: Simulation

Std. Dev: 0,08Mean: 0,75

Full scale test:Std.dev: 0,08Mean: 0,79

W: Simulation

Std. Dev: 63Mean: 834

Full scale test:Std.dev: 83Mean: 758

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ESP N2 – Comparison full-scale test

W-normalised: Simulation


Full scale test:Std.dev: 76Mean: 730

With normalised Working width

0,450,500,550,600,650,700,750,800,850,900,95

600 650 700 750 800 850 900

Working width

ASI

SimulationsFull-scale tests

W: Simulation


Full scale test:Std.dev: 83Mean: 758Normalised according to prEN 1317-2:2005;

Impact energy related

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Concrete (Barrier B5)

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Concrete - Input parameters

• Vehicle versions (GM_R2 vs. GM_R0)• Vehicle test mass• Friction barrier vs. vehicle

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Concrete - resultsASI

0,00

0,50

1,00

1,50

2,00

2,50


GM

_R0

GM

_R4

GM

_R0

GM

_R4

GM

_R0

GM

_R4

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Concrete - results

Time = 0,05 sec Time = 0,08 sec Time = 0,05 sec

Time = 0,10 sec NA Time = 0,10 sec

POMI – GM R4 TRL – GM R4 NPRA – GM R4

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Concrete - results



POMI – GM R4 TRL – GM R4 NPRA – GM R4

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Concrete – comparison full-scaletest

ASISimulation:


Full-scale test:Std.dev: 0,15Mean: 1,73

ASI - Energy

1,4

1,5

1,6

1,7

1,8

1,9

2

2,1

40 41 42 43 44 45 46 47 48

Energy (J)

ASI Simulation

Full scale

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SuperRail Steel H3 (Barrier B2)

Picture from TRL

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SuperRail – Input parameters

• Different version of GeoMetro used• Fixation to ground different• End boundaries different• Slightly different material data

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SuperRail - Results

ASI

0,00

0,20

0,40

0,60

0,80

1,00

1,20

1,40

1,60

1,80

POMI (LS-DYNA) NPRA (LS-DYNA)

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SuperRail - comparison with full-scale test

ASI - Working Width

1,00

1,10

1,20

1,30

1,40

1,50

1,60

1,70

500 600 700 800 900 1000

Working Width

ASI Simulation

Full scale

ASISimulation:


Full-scale test:Std.dev: 0,14Mean: 1,25

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VarioGuard Steel H2 (Barrier B3)

Picture from www.volkmann-rossbach.com

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VarioGuard – input parameters

• Three different vehicles have been used:– 10t Lorry– 13t Bus– Small car (GeoMetro)

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VarioGuard



NPRA – 10t POMI – 10t NPRA – Bus

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VarioGuard – comparison with full-scale test

W – 10t LorrySimulation:


Full-scale test:Std.dev: 58Mean: 2267

Working Width - Impact Energy

200,00220,00240,00260,00280,00300,00320,00340,00360,00

2000 2100 2200 2300 2400 2500

Working Width

Ener

gy

Simulation - Lorry 10t Full scale - Lorry 10t

Simulation - Bus Full-scale - bus

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ROBUSTComputational Mechanics

Results and Comparison

Workshop in Brussels 30.05.2006

Kristin Johannessen Force Technology

Norwegian Public RoadsAdministration

Norwegian Public Roads Administration - vegvesen

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