基于多目标的乘用车架拓扑优化设计
摘要
以某乘用车底盘优化为例,基于密度惩罚法和折衷规划法理论,采用多目标优化方法,兼顾低阶固有频率和多工况下车架刚度,避免了单目标优化对其它性能参数的影响。通过拓扑优化后得到的连续体离散模型,可知车架横梁的大体布局以及纵梁在哪些部位需要加强和弱化,为车辆轻量化和后续设计提供思路。
A passenger car chassis optimization model is built as an example.Based on SIMP method and Compromise Programming theory,a multi-objective optimization method is used.The loworder natural frequencies and frame stiffness under conditions is balanced.The impact on other performance parameters of the single objective optimization is avoided.The discrete model is calculated through topology optimization.By the result,the general layout of the frame beams and carling in which parts need to be strengthened or weakened can be seen.Idea for the vehicle lightweight and follow-up design is provided.
A passenger car chassis optimization model is built as an example.Based on SIMP method and Compromise Programming theory,a multi-objective optimization method is used.The loworder natural frequencies and frame stiffness under conditions is balanced.The impact on other performance parameters of the single objective optimization is avoided.The discrete model is calculated through topology optimization.By the result,the general layout of the frame beams and carling in which parts need to be strengthened or weakened can be seen.Idea for the vehicle lightweight and follow-up design is provided.
引文
[1]范文杰,范子杰,苏瑞意.汽车车架结构多目标拓扑优化方法研究[J].中国机械工程,2008,19(12):1506-1508.
[2]孙建辉,施进发,谢金法.概念设计中车身地板多目标拓扑优化的实现[J].拖拉机与农用运输车,2009,36(6):89-91.
[3]刘林华,辛勇,汪伟.基于折衷规划的车架结构多目标拓扑优化设计[J].机械科学与技术,2011,30(3):382-385.
[4]杜海珍,荣见华.汽车车架结构的拓扑优化设计[J].机械设计与研究,2007,23(1):116-119.
[5]韩明,吴晓明,黄鹤艇.多种工况下装载机机罩多目标拓扑优化设计[J].厦门大学学报,2011,50(1):56-59.
[6]刘江,桂良进,王青春等.全承载式大客车车身结构多目标优化[J].汽车工程,2008,30(2):170-174.
[2]孙建辉,施进发,谢金法.概念设计中车身地板多目标拓扑优化的实现[J].拖拉机与农用运输车,2009,36(6):89-91.
[3]刘林华,辛勇,汪伟.基于折衷规划的车架结构多目标拓扑优化设计[J].机械科学与技术,2011,30(3):382-385.
[4]杜海珍,荣见华.汽车车架结构的拓扑优化设计[J].机械设计与研究,2007,23(1):116-119.
[5]韩明,吴晓明,黄鹤艇.多种工况下装载机机罩多目标拓扑优化设计[J].厦门大学学报,2011,50(1):56-59.
[6]刘江,桂良进,王青春等.全承载式大客车车身结构多目标优化[J].汽车工程,2008,30(2):170-174.