汽车灯具壳体加强筋的优化设计  

Optimization Design for Housing Rib of Automobile Lamp

作　　者：胡桐铜 蔡恒 何景林 唐海 王超 孙铁成 HU Tongtong;CAI Heng;HE Jinglin;TANG Hai;WANG Chao;SUN Tiecheng(Chongqing Chang'an Automobile Co.,Ltd.,Chongqing 400020,China;Hubei Huazhong Marelli Automotive Lighting Co.,Ltd.,Xiaogan,Hubei 432100,China)

机构地区：[1]重庆长安汽车股份有限公司,重庆400020 [2]湖北华中马瑞利汽车照明有限公司,湖北孝感432100

出　　处：《塑料》2025年第1期95-99,107,共6页Plastics

摘　　要：基于常规受力工况建立汽车灯具有限元模型。为改善灯具壳体刚度性能并实现轻量化,从概念设计阶段到详细设计阶段,通过拓扑优化和尺寸优化对灯具壳体加强筋进行优化设计。在概念设计阶段,通过多个静态载荷模拟灯具在动态载荷下的变形趋势,以静态载荷下的灯具系统总柔度最小为目标,设计区域体积为约束,对灯具壳体加强筋进行拓扑优化设计。在拓扑优化的基础上,选取4个加强筋截面参数作为设计变量,结合修正的可扩展晶格序列法进行试验设计,构建了径向基函数(RBF)、最小二乘法模型的近似模型(LSR)。各参数在工程可行的约束下,以质量和灯具系统柔度最小为目标,采用全局优化算法(GRSM)进行求解,得到Pareto最优解。结果表明,在工程可行的前提下,优化后的灯具壳体加强筋质量下降了43.6%,危险点范式应力降低了8.6%,灯具壳体刚度性能在得到改善的同时,实现了材料轻量化。Firstly,according to the normal work condition,a simulation model of automobile lamp was established.Then in order to improve the stiffness performance and achieve light-weight for housing rib of lamp,the optimization design for the housing rib was conducted by topology and thickness optimization from concept design phase to detail design phase.Through the deformation with multiple static loads simulated the trend of the deformation with dynamic loads,topology optimization for the structure of lamp with multiple static load was done in concept design phase,taking the minimum of the total compliance for lamp system as objective,the volume of the design area as constraint.Based on the obtained topology,selecting 4 parameters of rib section as design variables,Radial Basis Function(RBF)modeling and Least Squares Regression(LSR)were constructed with the design of experiment of Modified Extensible Lattice Sequence.Global Response Search Method(GRSM)was adopted to perform multi-objective optimization with minimizing the mass of housing rib and maximum stress of housing as objective,and the Pareto optimal solution was obtained.Based on the contains of engineering feasibility,the results indicated that after optimization the mass of housing rib and maximum stress of housing was decreased by 43.6%and 8.6%respectively,and achieve light-weight with the stiffness performance improved.

关 键 词：灯具 加强筋 拓扑优化 轻量化 多目标优化 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] TQ330.41[自动化与计算机技术—计算机科学与技术]