基于混合灵敏度分析的某自卸车车厢结构优化设计  

Optimization Design of Dump Truck Structure Based on Mixed Sensitivity Analysis

作　　者：万强 阮景奎 WAN Qiang;RUAN Jing-kui(Key Laboratory of Automotive Power Train and Electronics, School of Mechanical Engineering, Hubei University of Automotive Technology, Shiyan 442002, China)

机构地区：[1]湖北汽车工业学院机械工程学院,汽车动力传动与电子控制湖北省重点实验室,十堰442002

出　　处：《科学技术与工程》2020年第12期4954-4961,共8页Science Technology and Engineering

基　　金：汽车动力传动与电子控制湖北省重点实验室开放基金(ZDK1201702)。

摘　　要：基于HyperMesh对某款自卸车车厢结构进行有限元建模,选取水平弯曲工况和扭转工况进行有限元分析,得到不同工况下的最大应力和变形,验证模型的有效性;并进行了自由模态分析,选取前10阶的固有频率和振型。在分析结果的基础上,以弯、扭刚度及一阶弯、扭模态频率为约束;以车厢结构总质量最小为优化目标,对34组设计变量进行直接灵敏度分析和混合灵敏度分析,得到了4组对结构性能敏感变量及16组不敏感变量,然后对4组变量进行厚度增加及16组变量进行减薄处理。最后对选取的20组变量进行模型重构,对优化前后的结构性能进行对比。结果表明:在不影响其他性能的前提下,减重9.8%,取得了较好的优化效果。HyperMesh was used to perform finite element modeling on the structure of a dump truck compartment.The finite element analysis of horizontal bending and torsional conditions was carried out,and the maximum stress and deformation under different working conditions were obtained,which verified the validity of the model.The natural frequencies and modes of the first ten steps were selected for the free modal analysis.On the basis of the analysis results,all the bending stiffness,torsional stiffness and first order bending mode frequency,first order torsional mode frequency were constrained.By taking the minimum total mass of the car structure as the optimization goal,direct sensitivity analysis and mixed sensitivity analysis were performed on 34 sets of design variables.Four sets of structural performance sensitive variables and 16 sets of insensitive variables were obtained,and the thickness of the four sets of variables was increased and the 16 sets of variables were thinned.Finally,the model reconstruction of the selected 20 sets of variables was carried out to compare the structural performance before and after optimization.The results show that the mass of the car structure is decreased by 9.8%under the condition of ensuring the premise of various performances,with good optimization efficiency.

关 键 词：车厢结构 性能分析 混合灵敏度 结构优化 

分 类 号：U463.84[机械工程—车辆工程]