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RAIL SEAT DEVELOPMENT USING
DYNAMIC CRASH SIMULATION
Pierre-Edouard Rousseau
30th September 2015

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Introduction

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Mesh creation
Dummy positioning & Instrumentation
FEA process
CAD import
Loadcase setup
Model Build
Post-processing

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Test/Simulation loadcase

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Dummy models

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Sled pulse

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Test example

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Safety forward event

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Injury post processing
Injury Criteria
GM/RT2
100
issue5
Injury Criteria
GM/RT2100
issue5
Head Resultant
Acceleration
80g
(3ms)
Chest deflection 63mm
Head Injury
criteria
500
(HIC15)
Chest V*C 1.0 ms-1
Neck Bending
moment
Flexion
310Nm
Femur Peak
Force LH & RH
5.7kN
(4.0kN for
TI >1.0)
Neck Bending
Moment
Extension
-135Nm
Knee
Displacement
LH &RH
16mm
Neck Injury
Criteria (NIJ)
1
Tibia Index
Up/Low LH & RH
1.0 (1.3 for
FL <4.0kN)
Chest
Acceleration
60g
(3ms)
Tibia Axial Load
LH & RH
8.0kN

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Injury post processing

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Injury post processing

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Integrity rearward event

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Integrity post processing

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Concept design
Baseline simulation
for each loadcase
Design changes discussed
with customer
Engineered feasible
SolutionUpdated CAD
Updated FE Model
Iterative Simulations
to Improve
Performance
Optimisation

15.
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Simulation driven design benefits
 Offers a time and cost effective solution compared to prototype build and physical
testing.
 FE model with various possible degrees of complexity.
 Allows detailed interrogation of results not normally possible with physical testing.
 High number of iterations possible due to short simulation time.
 Quick feedback on alternative solution possible.
 Possible implementation early in the engineering process.
 No need to « re-test » for sign-off if small changes are later implemented.
 High level of confidence before sign-off with physical testing.

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Thank you for your attention