In order to develop a new barrier to satisfy the trend of “plastics to replace steel”, according to current available evaluation standard, the crashworthiness topology optimization analysis was implemented on the PVC barrier by establishing the system of “vehicle-barrier” FEA model and combining the optimization method of cellular automaton. Above all, the key factor to enhance beam bending stiffness was obtained by the material mechanics properties contrast between Q235 and PVC based on the beam design theory. Secondly, the beam topological configuration was acquired by several crashworthiness topology optimization analyses in the beam design domain. Finally, the crashworthiness verification analysis of new configuration in “H” type was gained under the simulation software. The analysis results indicated that the beam topological configuration in 0.25 mass fractions was achieved the protective capability of 10t passenger car in A level, and the maximum lateral displacement of barrier was reached 785mm, the vehicle’s maximum acceleration in X, Y, Z axes were 6.67g, 4.93g and 2.16g, and met the requirements of the acceptance criteria.
Key words
PVC barrier /
cellular automaton /
crashworthiness /
topology optimization
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References
[1] A. Tabiei, A. Svenson. Impact performance of pultruded beams for highway safety applications [J]. Composite Structrues, 1998, 42 (3):231~237
[2]李汉初.怎样解决PE公路护栏不耐冲击的问题.广东化工，2003,(3):22～24
LI Hanchu. Research on how to resolve the week impact resistance problem of PE highway barrier[J]. Guangdong Chemical Industry, 2003,(3):22～24
[3]William Davids, Joshua K. Botting. Development and structural testing of composite-reinforced timber highway barrier. Construction and Building Materials [J].2006,20(9):733~743
[4]P.A.Du Boisa, T. Frank. Material behavior of polymers under impact loading [J]. International Journal of Impact Engineering ,2006,32：725~740
[5]韩晓伟. 利废成宝的PP-N塑料护栏[J]. 建设科技, 2004, 15(2):66~67
HAN Xiaowei. Research on the recycling method of PP-N plastic barrier[J]. Construction Science and Technology, 2004, 15(2):66~67
[6]H. Hong, J. A. Deeks, C. Q. Wu. Numerical simulations of the performance of steel guardrails under vehicle impact [J]. Transactions of Tianjin University. 2008, 14(5):89~93
[7]周拥仔.新型高分子防撞护栏材料的研究[D].长沙:长沙理工大学,2007:1-3.
ZHOU Yongzai. The research on new macromolecule crashworthy guardrail material[D]. Changsha University of Science and Technology, 2007:1-3.
[8]王林. 公路塑钢护栏的静力实验及动力性能研究[D].重庆: 重庆大学, 2005, 28-46
WANG Lin. The dynamic analysis and statics test research of highway plastic-steel safety barriers [D].Chongqing University, 2005, 28-46
[9] Zhengbao LEI, Lihong LI. Analysis on the Crashworthiness of Taiwan PVC Barrier[C]，The 2nd International Conference on Transportation Information and Safety（ICTIS 2013），June 28th-July 1st 2013, Wuhan, China，Paper No.: 2013-00049
[10]周珍珍.基于混合元胞自动机方法的结构拓扑优化研究[D].武汉:华中科技大学,2009:16-18
ZHOU Zhenzhen. The Research of Structural Topology Optimization Based on the Hybrid Cellular Automaton Method[D]. Huazhong University of Science & Technology, 2009:16-18
[11]许峰.某型特种车车身设计分析与优化研究[D].南京:南京理工大学,2012:43-44
XU Feng. A type of special vehicle body design analysis and optimization [D]. Nanjing University of Science and Technology, 2012:43-44
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