QUARTERLY REPORT OF CODE ASTER · PDF filepreliminary results for individualization of the...

QUARTERLY REPORT OF CODE_ASTER PROFESSIONAL NETWORK

1 ProNet UPDATE - 8 - November 2017

Code_Aster Professional Network

The Code_Aster Professional Network aims to spread and to acknowledge the

benefits of Code_Aster and Salome-Meca as open-source software.

http://www.code-aster.org/spip.php?rubrique62

This report is the eighth issue, after the first seven published since July 2015 ▼

http://www.code-aster.org/spip.php?article890

Summary of ProNet UPDATE 8

Trainings and meetings in the world

Industrial applications of Code_Aster

Simulation of a large test bench for AREVA NP by CETIM – France

Fragmentation process assessment of re-entering spacecraft – CNES –

France

Applications submitted by members

Use of Code_Aster for industrial studies – EC2 Modélisation – France

Structural shell stability and fatigue analysis (bridges and offshore structures)

University of Granada – Spain

Simulation to optimize qualification test programs on aeronautic products

PERMASWAGE – France

Acoustic computation of a wiring grommet in a small cabin using FEA –

CEVAA & LEONI – France

Salome Meca 2017 : AsterStudy great feedback

Many users have provided feedbacks on the use of Salome-Meca 2017,

published September 1, 2017. Thank you!

This new version inaugurated the AsterStudy interface, which brings a whole

new user experience for the data settings and launching of Code_Aster

calculations. The first feedbacks showed that AsterStudy suffered from some

blocking bugs that could affect the daily usage.

A new maintenance version … with some improvements After two months, a new version is therefore released that corrects a dozen

anomalies. This new version also introduces some improvements. This version

2017.0.2 is therefore a small step for Salome-Meca but a giant leap for

AsterStudy!

Contact

Jean-Raymond Lévesque – Representative of Code_Aster ProNet

[email protected]

Code_Aster Open source for sustainable

development … join the network ProNet

New members

Since 01/2017

ALGERIA

ARGENTINA

FRANCE

GERMANY

SPAIN

TUNISIA

November 2017

83 members (see last page)

http://www.code-aster.org/spip.php?rubrique62

http://www.code-aster.org/spip.php?article890

https://www.code-aster.org/V2/spip.php?article1018




mailto:[email protected]



Training and meetings in the world

in France

Sixense NECS

On December 4th 2017, Sixense NECS held a training session in Paris entitled

“Seismic analysis of the structures - Methods standards and advanced”. It

includedpractical usage and welcomed more than thirty participants. While

being based on a case study (building), the formation also reviewed the

various calculation approaches and insisted on the practical aspects of

structural optimization and implementation. Contact [email protected]

In Germany

Code_Aster group courses with Salome-Meca 2017 With the re-designed user interface AsterStudy, Salome Meca provides much

more user friendliness and flexibility for users.

Dynamic analysis (30 Nov. - 01 Dec. 2017) - Johannes ACKA & Michael

GRABIETZ Contact http://www.code-aster.de/seminars-and-training.html

Sustainable development in Maghreb with Code_Aster

After three meetings in 2017 in Monastir (Tunisia), Oran (Algeria) and Meknes

(Morocco) for the deployment of Code_Aster Open source in Maghreb :

An agreement with the Tunisian Association for Mechanics (ATM) was

signed for the implementation of Salome-Meca 2017 and the organization

of a training session for five Tunisian engineering schools starting in January

2018.

The Network of the Moroccan public schools sponsored a Code_Aster and

Salome-Meca deployment project with a general meeting planned in

February 2018 (University Moulay Ismail - MEKNÈS).

Contact [email protected]

in Argentina

Argentinean Association for Computational Mechanics (AMCA) and

ENIEF Conference

During the conference ENIEF 2017 (held in the National University of LA PLATA,

November 2017), the second users meeting of EDF codes was organized to

share experiences and information between users of the codes of the

platform SALOME / Code_Saturne / Code_Aster.

Contact [email protected] and www.amcaonline.org.ar

SCOPE Ingenieria

In October 2017, SCOPE Ingeneria organized a Code_Aster course gathering

more than 20 persons at UTN-FRC (National Technological University -

CORDOBA). The trainees group included engineering students, teachers from

different universities and industry professionals. New training sessions are

planned in 2018.


TRAINING

For 2018 several

organizations

propose training

sessions

for Code_Aster and

Salome-Meca

www.phimeca.com/Formations

www.code-aster-services.org

www.cevaa.com

www.code-aster.de/services

www.vonstein-partner.de

www.scopeingenieria.com

TUTORIALS

The course materials used

by EDF for internal

teaching are online and

written directly in English.

http://code-aster.org/spip.php?rubrique68


http://www.code-aster.de/seminars-and-training.html



http://www.amcaonline.org.ar/


http://www.phimeca.com/Formations

http://www.code-aster-services.org/

http://www.cevaa.com/

http://www.code-aster.de/services

http://www.scopeingenieria.com/





Overview of activities of Italian Community


KOBE Engineering – Presentation during last ProNet Meeting – November 2017

Kobe is a spin-off candidate at the University of Florence,

Department of Civil and Environmental Engineering.

One of its interest is the Risk and Vulnerability of masonry in

general and especially tower like structure, highly

vulnerable in case of seismic events.

Damage constitutive laws can represent homogenized

masonry. Kobe evaluates the damage models in

Code_Aster ENDO_ISOT_BETON ENDO_ORTH_BETON,

MAZARS, BETON_DOUBLE_DP.

For the Sant’Agostino fortifications de San Gimignano, a

laser scanner survey used in AsterStudy permits to present

preliminary results for individualization of the crack origin. Contact [email protected] and [email protected]

AETHER Engineering – Presentation during last ProNet Meeting – November 2017

Aether Engineering operating on the fields of structural consultancy and design of timber buildings, has developed over

the last two years Aetherium, an application that permits to manage complex timber building structures from model

creation to code verifications with an automatized, script-powered workflow.

The members of Aether Engineering presented some of the latest features developed in Aetherium leveraging the

power of Code_Aster and Salome-Meca:

1. Visual Projection of Verification Index: visualization on the mesh of the numerical model of verification indices for

each structural component based on code-compliant failure-mechanisms and load combinations;

2. Time-History Fire Analysis and Verification: a method that permits to elaborate a time-history analysis and verification

of a timber structure subjected to fire;

3. Performance Gain Factor: an implementation that permits to understand the gain/loss of performance in a

structure, induced by a structural modification;

4. Linear Time-History Dynamic Analysis: the introduction in Aetherium’s workflow of seismic analysis.

1. Verification mechanisms 2. Performance gain factor

Contact [email protected] and [email protected]

PISTOIA (Italy) – 15th December 2017

A seminar entitled “Open Source finite elements codes for Civil Engineering. General criteria and cases

study” organized by the Order of the Engineers of Pistoia gathered several contributions with code_aster:

the Department of Civil engineering and Environment of University Firenze, the Code_Aster Team EDF

Lab, KOBE Engineering and Conoscerelinux (feedback of mechanical engineering).


MODENA (Italy) – November 2017

Between 07th and 28th November 2017, CONOSCERE LINUX organized four training sessions on “analysis

by finite elements with open source software (Code_Aster)” by Roberto LUGLI.









Industrial application of Code_Aster (nuclear equipment)

Vibratory simulation of a large test bench at Jeumont

(France) for AREVA NP – CETIM

For the validation of the

vibratory behavior of one of its

test bench dedicated to the

operation of primary pumps of

nuclear power plants in real

conditions, AREVA NP -

Jeumont played the card of

simulation.

The test bench comprises a bunker in which the primary motor-driven pump group is installed. The pump is

connected to a test loop in closed circuit made of tubes of stainless steel of one meter in diameter and 24

meters in length in which pressurized water at 300°C circulates. The primary motor-driven pump group rests

itself on a concrete base of 2,000 tons.

Capturing Eigen frequencies

“In the phase of design, it was essential to study the vibratory behavior of this bench. One had in particular to

check that it did not have Eigen frequencies in coincidence with those of the motor-driven pump group”,

indicates the project manager.

It is to CETIM that AREVA entrusted the calculations of the vibratory behavior of this test bench. The simulation,

carried out with Code_Aster, made it possible to study the vibratory answer of the bench in particular by

taking of account the coupling between the interaction of the fluid and the structure in which it circulates.

Installing damping devices

“Calculations highlighted the need for installing damping devices and for improving the structural design of

the concrete bunker compared to what had been conceived initially”.

The test bench has since been put in operation in the very new center of tests of AREVA at Maubeuge. There,

the motor-driven pumps groups produced by the AREVA - Jeumont factory are tested full-scale… without

vibratory interference!


5 ProNet UPDATE - 8 – November 2017

Industrial applications of Code_Aster (spatial activities)

A first step toward fragmentation process assessment of re-entering

spacecraft: mechanical stress analysis with the spacecraft oriented

simulation tool PAMPERO

G. PRIGENT (CNES), J. CARRO et B. CRUSSON (GMV), L. STAINIER (GEM)

9th IAASS Conference – Toulouse(France) – October 2017

In the framework of the French Space Operation Act, the French space agency works continuously to

improve the accuracy of predictive numerical simulations of spacecraft that operates atmospheric re-entry.

Some preliminary sensitivity analysis have shown that the outcomes of the fragmentation process of

spacecraft have a major influence on risk assessment resulting from survivability analysis performed for each

fragment.

To get a deeper understanding of the physic at play during the fragmentation process, the French Space

Agency has initiated the development of a new feature of its spacecraft oriented simulation tool called

PAMPERO. Besides computing aerodynamics forces, trajectory and parietal heat flux, a new module has

been added to PAMPERO to compute the stress resulting from the aero-thermal loads applied on the re-

entering object. This new mechanical module relies on the validated simulation tool Code_Aster developed

by Electricité de France.

Development: prototyping of the interface with Code_Aster

Output interface PAMPERO -> Code_Aster

Input interface Code_Aster -> PAMPERO

Verification: ATV vehicle re-entry

ATV vehicle Von Misses stress field ATV vehicle temperature field

The objective of this test case is to perform a qualitative verification of the software using a complex object

as the ATV vehicle. The vehicle is receiving the flow produced by its advancement through the atmosphere

along its longitudinal axis (Angle of Attack equals to zero).

We can observe in the above figures that the stress and temperature fields are different; the stress field is

maximal in the junction between the body and the solar panels of the vehicle whereas the temperature field

is maximal in the nose that is receiving the thermal flux and in the solar panel attack edge.




Examples of use of Code_Aster for industrial studies

Lionel DEPRADEUX – EC2 Modélisation

Transversal stresses

Thermal evolution and residual stresses in a welded joint

comprising several materials to qualify the compression

state in the transverse direction at the heart of the

component.

THER_NON_LINE, CALC_META, STAT_NON_LINE

Thermically Affected zone ( Austenitic transformation)

Simulation of welding by electron beam on martensitic steel

Seismic analysis of components of oil refinery

Determination of the residual stresses in a welded joint

temps

températures




Code Aster in structural shell stability and fatigue analysis in bridges

and offshore structures

Alejandro E. Martínez Castro. University of Granada

A. Castillo and D. Trujillo (ACL-Estructuras), J. M. Terrés (Oritia & Boreas)

Fatigue Analysis of steel wind barriers in the new bridge over the Cadiz bay.

Stress concentration factors in hot-spot points and notch stress computations. Fatigue life predicted from

accurate wind time-series and Palgreen-Miner rule.

Nonlinear low-cycle fatigue test in a meteorological mast lattice tower.

Stability verification at conical transition based on complete load-unload tests. Certification with DNV-GL.




Simulation to optimize qualification test programs

on aeronautic products

Mickaël DUMONT - Permaswage

PERMASWAGE is the technology leader in the fluid fitting industry providing proprietary and standard

components, tooling, and training to all major aerospace companies globally.

To qualify our products, numerous experimental tests are required. The analysis conducted with Code_Aster

permit to demonstrate several tests by FEA, especially rotary flexure and vibrations.

Rotary flexure for flanged fitting

The fitting, connected to a circuit at each extremity, includes a flange to

clamp it on a panel. A flexure is applied at one end of the circuit, leading

to a stress concentration on the flange. This flexure rotates, generating

solicitation cycles.

The set-up is modelled by FEA with 3D elements. Applying a deflection at

the extremity, the stress concentration is calculated on the flange. The

admissible stress level is obtained for a given material with the calculated

stress on a fitting reference which passes the tests.

For 4 years, 45 references have been validated with Code_Aster.

Vibrations

Vibrations tests have been performed with success on fittings including a polymer material. In order to

qualify another polymer material, the effect of this change on the Eigen frequencies has been calculated.

The set-up is modelled by FEA with 1D elements. Given the low influence of this change on the circuit, the

fitting including the new material has been validated with Code_Aster.

Test set-up – CAD view

Test set-up – mesh

Stress concentration on flanged fitting

Test set-up – oscillation modes




Acoustic computation of a wiring grommet in a small cabin using FEA

Martin GAROT et Nicolas MERLETTE (CEVAA), Louis CHRETIEN et Federico CABRERA (LEONI)

SAE International – Paper 17AE-0459

Nicolas MERLETTE presented during the last ProNet meeting the product needs of firewall grommets (safe

routing of the harness, water tightness, and acoustic performance). The objectives of the numerical simulation

of such components are to tackle: Cost issues

Functions leading to expensive solutions

Material mass contributing to the acoustic performance

Time to market issues

Prototyping

Acoustic testing

Challenges

Smart solutions, acoustic design rules

Early phase simulation

Computational methods

Numerical modeling of the small cabin and the wiring grommet

3D model and axisymmetric model

Computation hypotheses Fluid/Structure interface / Anechoic condition Damping Loss factor / Felt in air

Presentation of the wiring grommet

Anechoic boundary

Fluid wave load

Geometric model

• Axisymmetric model carried out from a 3D file

• Important acoustic ring impact on this model

• Simplification of the grommet/ring interface

Ring characteristics

Thickness: 3 mm

Diameter: 100 mm

Material: EPDM

Mesh parameters

Triangle faces

Size of the mesh:

162,227 nodes

322,823 2D elements Localization of microphones

as in the Small Cabin

Convergence tests

Computation results

Simulation of the Insertion Loss with and without the acoustic ring

• Impact at this frequency well visible

Displacement map at 1000 Hz with ring. Displacement map at 1000 Hz without ring.

Displacement of the ring

Vibration of the lip



Industrial and research centers, services providers and teachers are welcome

83 members - 18 countries

Italy France France Switzerland France Spain France

Switzerland France France Argentina Switzerland France France

France UK France France France France France Czech Republic France

France

France France Czech Republic

Germany France Canada Spain France France Germany

France UK France Germany Germany Korea Italy

France Algeria France France France UK France

France Poland Switzerland France France Switzerland Germany

France France Spain France France Japan

France Poland France Germany Poland France France Poland France Germany France Poland

Germany Switzerland Germany Canada Germany Mexico China

Italy France Canada Latvia Germany Germany Chile

Algeria Tunisia Tunisia Tunisia Tunisia Spain Tunisia

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