pages 31 à 46 de pres méca iset sousse jan 2014-pdf-3

8/12/2019 Pages 31 46 de Pres Mca Iset Sousse Jan 2014-PDF-3

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TELNET 2012 - Toute reproduction interdite

Multi-Physic Intelligent Systems Modeling & Analysis

Performance Prediction of multidisciplinary complex

equipments Optimization of functioning

Simulation & Numerical Analysis

1D Modeling & Simulation


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Numerical Simulation

Descript ion :

Starting from technical specifications setting out the mesh quality, CAD files inputs are preprocessed to meet the requirements

of the calculations to be done (Crash, EMC, RF, Rheology, ..).

Deliverables are mesh files formatted according to the specifications and quality requirements.

Meshing :

CEM meshing

Rheologic meshing

Meshing of moving assembly

Crash meshing


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Description :

Projects in linear static and dynamic calculations are intended to :

-Check the strength of a mechanical component or structure when submitted to service loads and stress, if required, the

necessary reinforcements are proposed,

-Optimize the thickness of the used shapes and materials to save weight and costs.

Deliverables are reports and calculation notes with CAD files of the modified and optimized part or assembly.

Static and Dynamic Simulation


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Results of the Disassembly phase :

Stress level and reaction force

23493Elements

42778Nodes

These faces are clamped

Clip

0

5

10

15

20

25

30

35

40

45

0 0,05 0,1 0,15 0,2 0,25 0,3 0,35

Time (s)

Stresses

(MPa)

-5

0

5

10

15

20

25

30

ReactionF

orce(N)

Stresses (Mpa)Reaction Force (N)


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Lot 9: This lot is about the modal

analysis of the ACC pointer

6900Element

17472Node

0.0001.3590.0001448.210

0.0000.0180.0281443.190.0000.0000.045970.58

0.0021.1320.000877.17

0.1320.0090.000869.56

0.0000.0000.001453.15

0.0010.0001.927226.44

1.7750.0250.001217.43

0.8900.0140.000150.22

0.0000.0000.747147.61

Z(g)Y(g)X (g)(Hz)

EFFECTIV MASSFREQUENCYMODE


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Example : Truck trailer

This study concerns the validation of the strength of the entire trailer structure and the optimization of the metal sheets

thickness :

1)Meshing of the entire structure

2)Verification of the stress values under maximum load in static case and during start / brake phases.

3)Check out the modal frequencies.

4)Optimization of thickness (300 Kg of weight were saved)



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Example : Multi-blades spring

This study concerns the assessment of the spring flexibility (in mm/100Kg), starting from a CAD file. Then, making the

necessary modifications to the spring shape to reach the targeted flexibility.

Thanks to this study COTREL reduced the number of physical test prototypes from 7 to only 1.

The deviation between the calculated and measured values of flexibility was around 1%.



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Stress Analysis of a test bench

for Satellite



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Area : Numerical Simulation

Description :

Projects in linear static and dynamic calculations are intended to :

-Check the strength of a mechanical component or structure when submitted to service loads and stress, if required, the

necessary reinforcements are proposed,

-Optimize the thickness of the used shapes and materials to save weight and costs.

Deliverables are reports and calculation notes with CAD files of the modified and optimized part or assembly.

Static and Dynamic Simulation :

Simulation of the forced vibration of a

braking console of a airplane


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Description :

The rheological simulation projects are intended to determine the optimum conditions to meet the injection time cycle desired

by the client. This simulation concerns : the choice of the position and shape of the injection gates, cooling of the mold,

prediction of deformed shape after the molding, prediction of fiber orientation, shrinkage, weld lines, ..

Rheological simulation

Calculation of the filling time of a

BSM flange

Dimensioning of the cooling

circuit

Prediction of the fibers orientation ofthe Division bar

Prediction of the deformed shapes

of a division bar


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Multi-Physics Modeling & Analysis

+

=

+

2

2

zr

r

1kuu

z

T

r

Tr

rz

T

r

TCp ( )

+

+

+

+

+

u

uu

1u2

22

z

2

r

2

r

z

u

rzrr

rz


CFD Simulation of a defrost valve


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Thermal Analysis


Thermal Analysis of a Electronic device

for Telnet Innovation Labs


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CFD Simulation


CFD Simulation of a exhaust tube


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Conclusion

La simulation numrique, tout domaines confondus, est

un outi l essentiel pour la matrise de la technologie et un

atout important pour le dveloppement de notre pays

dans lre de lconomie numrique.


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Thank you

pages 31 à 46 de pres méca iset sousse jan 2014-pdf-3

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