Experimental Study and Optimization on Crashworthiness Performance of a Car Door Trim System
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摘要: 应用试验方法和有限元法对车门内饰板总成的侧面耐撞性进行研究,并在此基础上优化缓冲块的结构设计,以获得更高的吸能特性。参照国家标准和行业规范,确定门内饰板总成胸部、腹部及胯部的碰撞区域,设计、制造冲击头,并在摆锤试验台上对其进行耐撞性测试;基于LS-DYNA平台,建立门内饰板总成的有限元模型,其中材料模型中主要参数均通过实验直接获取,基于建立的有限元模型进行耐撞性分析,模拟结果和试验结果符合较好;以建立的有限元模型为基础,基于实验设计和支持向量机方法建立缓冲块吸能特性的替代模型,并以此为基础对缓冲块进行结构优化。优化后缓冲块吸能增加86.0%,门内饰板总成吸能增加42.2%。Abstract: The impact resistance of a car door trim is studied through experiment and finite element simulation. In order to meet higher performance requirements, the design of the foam structure is optimized based on the research result. Based on the related industry standards of China, the door trim collision regions relative to the occupant chest, abdomen and hip are determined; then the impactor is designed and manufactured, and the crashworthiness tests are conducted on the pendulum test bench. The finite element model of the door trim is established based on LS-DYNA and the model parameters of the main components are determined through experiments directly, then the crashworthiness analysis is undertaken with the established finite element model. The experimental results and simulation results are in good agreement. Based on the method of experimental design and the support vector machines, a surrogate model is established and structural optimization of the foam structure is done, the results show that the energy absorbed by the foam increases by 86.0%, energy absorbed by the door trim system increases by 42.2%.
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Key words:
- energy absorption /
- finite element method /
- impact resistance /
- structural optimization
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[1] Peden M, Scurfield R, Sleet D, et al. World report on road traffic i999njury prevention[M]. Geneva: World Health Organization, 2004:91-91 [2] GB20071-2006.汽车侧面碰撞的乘员保护[S].北京:中国标准出版社,2006 GB20071-2006. The protection of the occupants in the event of a lateral collision[S]. Beijing: China Standard Press, 2006 (in Chinese) [3] ECE R95. Uniform provisions concerning the approval of vehicles with regard to the protection of the occupants in the event of a lateral collision[S].2004 [4] Zhang B, Yang J K, Zhong Z H. Optimisation of vehicle side interior panels for occupant safety in side impact[J]. International Journal of Crashworthiness, 2010,15(6):617-213 [5] 董学勤,朱西产,马志雄,等.基于零部件试验的汽车侧面碰撞假人伤害的研究[J].汽车工程,2012,34(10):894-897,942 Dong X Q, Zhu X C, Ma Z X, et al. A research on the dummy injury in vehicle side impact base on components tests[J]. Automotive Engineering, 2012,34(10):894-897,942 (in Chinese) [6] Zhu P, Pan F, Chen W, et al. Use of support vector regression in structural optimization: Application to vehicle crashworthiness design[J]. Mathematics and Computers in Simulation, 2012,86:21-31 [7] LS-DYNA Keyword User's Manual[M]. Livermore, California, USA: Livermore Software Technology Corporation, 2007 [8] ASTM D638-08. Standard test method for tensile properties of plastics[S]. [9] Kolling S, Du Bois P A, Benson D J, et al. A tabulated formulation of hyperelasticity with rate effects and damage[J]. Computational Mechanics,2007,40(5):885-899 [10] GB/T 8813-2008.硬质泡沫塑料压缩性能的测定[S]. 2008 GB/T 8813-2008. Rigid cellular plastics - Determination of compression properties[S]. 2008 (in Chinese) [11] GB 9641-88.硬质泡沫塑料拉伸性能试验方法[S].1988 GB 9641-88. Test method for tensile properties of rigid cellular plastics[S]. 1988 (in Chinese) [12] 刘鹤年.流体力学[M].北京:中国建筑工业出版社,2001 Liu H N. Hydrodynamics[M]. Beijing: China Building Industry Press, 2001 (in Chinese) [13] 《机械工程材料性能数据手册》编委会.机械工程材料性能数据手册[M].北京:机械工业出版社,1995 Mechanical Engineering Material Property Data Handbook Editor Board. Mechanical engineering material property data handbook[M]. Beijing: Mechanical Industry Press, 1995 (in Chinese) [14] Forrester A I J, Keane A J. Recent advances in surrogate-based optimization[J]. Progress in Aerospace Sciences, 2009,45(1-3):50-79 [15] Clarke S M, Griebsch J H, Simpson T W. Analysis of support vector regression for approximation of complex engineering analyses[J]. Journal of Mechanical Design, 2005,127(6):1077-1087 [16] Jiang M F, Wang C Q, Huang W Q, et al. The application of support vector regression method for solving the inverse ECG problem[J]. Advanced Materials Research, 2010,108-111:828-833 [17] 袁亚湘,孙文渝.最优化理论与方法[M].北京:科学出版社,1997 Yuan Y X, Sun W Y. Optimization theory and methods[M]. Beijing: Science Press, 1997 (in Chinese)
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