Optimization Of A Car Seat Under Impact Load
Author(s)
F. J. Szabó
Abstract
The behaviour of the metal structure of a car seat subjected to impact loading has
been investigated computationally by the finite element program system
COSMOS/M, where a macro has been developed for the calculation of energy
transformations during impact with the body of the driver in an accident. The
finite element results and the calculated impact behaviour have been verified by
an experiment. Having good agreement between the computational and
experimental results, the macro calculating the behaviour data of the structure
has been implemented to the optimization process for minimum mass. For the
optimization the Random Virus Algorithm (RVA) is used, which is a new
algorithm developed by the author for use in multidisciplinary optimization
problems. The new concept of the algorithm is to model the very fast
reproduction of biological (or computer) viruses, which give extremely good
efficiency to the optimization algorithm. The optimization algorithm, the finite
element model and the energy calculation are stored and running as one macro
inside the finite element system. The results of the finite element calculations,
experiments and of the optimization are presented in tables, finite element
contour pictures and photos of the experiments. The method is able to take into
account higher eigenmodes and eigenshapes therefore it can be applicable for
higher speed impacts, too, after strong experimental verification. The macro
makes it possible to use all the multidisciplinary or multiphysics features of the
original finite element program system, therefore makes it possible to combine
several phenomena during the multidisciplinary optimization, e.g. heat transfer
or temperature dependent material characteristics with impact load, which can
open new horizons for the optimization of structures for extreme loads during
accidents, terror-attacks, explosions or tornados. A numerical example of the
metal structure of a car seat is presented.
Keywords: optimization, impact load, metal structures, programming FEM.
Keywords
optimization, impact load, metal structures, programming FEM.
Related Book
Other papers in this volume
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