The Optimization of Vehicle Safty Based on Reverse Theory
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摘要: 提出了一种基于反求理论的汽车碰撞安全性优化方法。为了提高有限元仿真在汽车安全性分析方面的准确性,通过有限元仿真与试验验证相结合的方法,利用反求技术求出材料的特性参数。将得到的特性参数应用于某种卡车驾驶室的相同材料,对驾驶室的结构参数进行优化。选取卡车翻滚时对驾驶员安全影响较大的参数作为优化目标,利用遗传算法对构造的多目标优化模型进行计算。通过计算结果可知,有限元仿真中默认的材料特性参数与试验结果有一定的差别,将试验得出的数据应用于优化中可以得到更准确的结果。Abstract: This paper presents an optimization method for vehicle crash safty based on reverse theory. To improve the accuracy of finite element simulation on the analysis of vehicle safty,an inverse problem is established to obtain the material characteristic parameters by combining finite element simulation and test verification. Then,the structure optimization of a truck cab is conducted,in which the real parameters are utilized. The parameters which have great impact on the safety of driver are selected as optimization objectives and a genetic algorithm is adopted to solve this multi-objective optimization problems. The result indicates that there is some differences between the default material parameters of the finite element simualtion software and the experimental data. The optimized results by using experimental data will be more accurate than those obtianed by using the default material parameters.
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Key words:
- computer simulation /
- crashworthiness /
- experiments /
- finite element method
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[1] Lust R. Structural optimization with crashworthinessconstraints [J]. Structural Optimization，1992，4:85-89 [2] Marklund P O，Nilsson L. Optimization of a car bodycomponent subjected to side impact [J]. StructMultidisc Optim，2001，21:383-392 [3] Hou S J，Dong D，Ren L L，et al. Multivariablecrashworthiness optimization of vehicle body byunreplicated saturated factorial design [J]. StructMultidisc Optim，2012，46:891-905 [4] 何汉桥，张维刚. 高床大客车侧翻结构安全性仿真研究[J]. 机械科学与技术，2007，26(7):922-930He H Q，Zhang W G. Simulation of safety of high-bedbus under side overturning crash [J]. MechanicalScience and Technology for Aerospace Engineering，2007，26(7):922-930 (in Chinese) [5] White K P，Gabler H C，Pilkey W D，et al. Simulationoptimization of the crashworthiness of a passengervehicle in frontal collisions using response surfacemethodology [R]. Society of Automotive Engineers，850512，1985 [6] 张维刚，廖兴涛，钟志华. 基于逐步回归模型的汽车碰撞安全性多目标优化[J]. 机械工程学报，2007，43(8):142-147Zhang W G，Liao X T，Zhong Z H. Multi-objectiveoptimization for crash safety design of vehicles usingstepwise regression model [J]. Chinese Journal ofMechanical Engineering，2007，43 (8): 142-147 (in Chinese) [7] 李玉璇，林忠钦，蒋爱琴，等. 材料模型参数设置对碰撞仿真结果的影响[J]. 汽车工艺与材料，2002，10:26-28Li Y X，Lin Z Q，Jiang A Q，et al. The effect ofmaterial model parameters setting on impact simulationresult[J]. Automobile Technology & Material，2002，10:26-28 (in Chinese) [8] 王国春，成艾国，高晖，等. 材料应变率对汽车碰撞性能影响的研究[J]. 汽车工程，2010，32(6):482-485Wang G C，Cheng A G，Gao H，et al. A stydy on theeffects of strain rate on the crashworthiness of vehicle[J].Automotive Engineering，2010，32 (6 ): 482-485 (in Chinese) [9] 吴峻岭，黄靖，朱平. 材料应变率及拉、 压非对称特性对汽车碰撞仿真结果的影响[J]. 机械制造，2008，(3):40-43Wu J L，Huang J，Zhu P. The impact of material strainrate and tensile，pressure asymmetric characteristics tothe simulation results of vehicle collision [J].Machinery，2008，(3):40-43 (in Chinese) [10] LS-DYNA Version 970 Keywords user's manual [S].(MAT): 20. 98-20. 101 [11] 胡远志，曾必强，谢书港. 基于 LS-DYNA 和 HyperWorks的汽车安全仿真与分析[M]. 北京:清华大学出版社，2011Hu Y Z，Zeng B Q，Xie S G. Automobile safetyanalysis and simulation based on LS-DYNA andHyperWorks[M]. Beijing: Tsinghua University Press，2011 (in Chinese) [12] Liu G P，Han X，Jiang C. A novel multi-objectiveoptimization method based on an approximation modelmanagement technique [J]. Computer Methods inApplied Mechanics and Engineering，2008，197:2719-2731 -
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