基于耐撞性可靠性优化的SUV车架改进
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摘要
建立了SUV的车架和车身的有限元模型,针对40%偏置碰撞车架变形严重,车内乘员生存空间严重受到挤压的问题,提出了对车架各主要部件进行改进设计并在加强区域适当增加加强件,建立优化数学模型对前纵梁进行耐撞性可靠性优化设计。对改进和优化后的整车安全性进行碰撞仿真分析和实车实验验证,乘员生存空间得到明显的改善。
The SUV's frame and body finite element model is estavlished for the problems of the frame serious deformation and vehicle passengers' living space serious extrusion within the 40% offset front impact.The improvement for the design of the frame main components and the appendant some high strength sheets in appropriate regions are proposed.Establish the optimization design mathematic model to optimize the crashworthiness reliability of the front longitudinal.For the safety of the whole improved and optimized vehicle,compare its value of crashworthiness simulation with real vehicle collision test,find that the passengers' living space has a remarkable improvement.
The SUV's frame and body finite element model is estavlished for the problems of the frame serious deformation and vehicle passengers' living space serious extrusion within the 40% offset front impact.The improvement for the design of the frame main components and the appendant some high strength sheets in appropriate regions are proposed.Establish the optimization design mathematic model to optimize the crashworthiness reliability of the front longitudinal.For the safety of the whole improved and optimized vehicle,compare its value of crashworthiness simulation with real vehicle collision test,find that the passengers' living space has a remarkable improvement.
引文
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[12]苏庆,孙凌玉.闭口帽型薄壁梁压溃历程的精确仿真[J].农业机械学报,2007,38(7):137~140.
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[14]武和全,胡宏伟,辛勇.薄壁梁诱导槽结构抗撞性优化设计及应用[J].公路交通科技,2011,28(1):120~126.
[15]武和全,辛勇.基于神经网络的变截面梁抗撞性分析及优化设计[J].振动与冲击,2010,29(10):102~107,174.
[2]Andrew Parrish,Masoud Rais-Rohani,Ali Najafi.Crashworthiness optimisation of vehicle structures with magnesium alloy parts[J].International Journal of Crashworthiness,2012,17(3):259~281.
[3]葛如海,王群山.缓冲吸能式保险杠的低速碰撞试验和仿真[J].农业机械学报,2006,37(2):29~32.
[4]姚宙,李光耀,李方义.基于遗传算法与仿真的偏置碰撞安全结构改进研究[J].中国机械工程,2010,21(22):2755~2760.
[5]张勇,陆勇.基于近似模型技术的圆管耐撞性优化设计[J].华中科技大学学报(自然科学版),2010,38(9):129~132.
[6]常伟波,张维刚,谢伦杰,等.概念设计阶段薄壁直梁的耐撞性优化[J].汽车工程,2013,35(2):147~151.
[7]辛勇,董学勤.汽车车架碰撞下的安全性设计与仿真[J].机械科学与技术,2011,30(3):359~362.
[8]吴毅,朱平,张宇.基于侧面碰撞仿真的轿车防撞杆结构优化研究[J].机械设计与研究,2006,22(5):108~112.
[9]张维刚,钟志华,赵幼平,等.计算机仿真技术在汽车正碰安全性能改进中的应用研究[J].机械工程学报,2002,38(3):135~138.
[10]鄢回洪,辛勇.汽车车身偏置碰撞抗撞性分析与结构改进[J].机械科学与技术,2013,32(6):829~833.
[11]Koji Mizuno,Kenji Wani,Hideki Yonezawa.Vehicle crashworthiness in full and offset frontal impact tests[J].JSAE Review,2003,24(2):173~181.
[12]苏庆,孙凌玉.闭口帽型薄壁梁压溃历程的精确仿真[J].农业机械学报,2007,38(7):137~140.
[13]Yucheng Liu.Optimum design of straight thin-walled box section beams for crashworthiness analysis[J].Finite Elements in Analysis and Design,2008,44:139~147.
[14]武和全,胡宏伟,辛勇.薄壁梁诱导槽结构抗撞性优化设计及应用[J].公路交通科技,2011,28(1):120~126.
[15]武和全,辛勇.基于神经网络的变截面梁抗撞性分析及优化设计[J].振动与冲击,2010,29(10):102~107,174.