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Title of Journal: J Cent South Univ

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Abbravation: Journal of Central South University

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Central South University

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DOI

10.1007/bf03077977

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2227-5223

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Multiobjective optimisation of a vehicle energy a

Authors: Suchao Xie Hui Zhou
Publish Date: 2014/06/14
Volume: 21, Issue: 6, Pages: 2539-2546
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Abstract

In order to optimize the crashworthy characteristic of energyabsorbing structures the surrogate models of specific energy absorption SEA and ratio of SEA to initial peak force REAF with respect to the design parameters were respectively constructed based on surrogate model optimization methods polynomial response surface method PRSM and Kriging method KM Firstly the sample data were prepared through the design of experiment DOE Then the test data models were set up based on the theory of surrogate model and the data samples were trained to obtain the response relationship between the SEA REAF and design parameters At last the structure optimal parameters were obtained by visual analysis and genetic algorithm GA The results indicate that the KM where the local interpolation method is used in Gauss correlation function has the highest fitting accuracy and the structure optimal parameters are obtained as the SEA of 298558 kJ/kg corresponding to a=70 mm and t= 35 mm and REAF of 02896 corresponding to a=70 mm and t=19615 mm The basis function of the quartic PRSM with higher order than that of the quadratic PRSM and the mutual influence of the design variables are considered so the fitting accuracy of the quartic PRSM is higher than that of the quadratic PRSM

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