摩托车车架基于梁单元的结构优化  

Structural Optimization of Motorcycle Based on Beam Element

作　　者：贺岩松[1,2] 黄深荣[2] 张志飞[1,2] 夏小均[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030 [2]重庆大学机械工程学院,重庆400030

出　　处：《机械科学与技术》2013年第12期1748-1751,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：重庆市科委攻关项目(cstc2009ac6076)资助

摘　　要：为了改善摩托车的乘坐舒适性和强度性能,建立了某型摩托车车架的有限元模型,进行了自由模态分析,并与实验模态进行比较。在此基础上,运用MSC.Nastran分析软件,以提高第1阶频率为目标,将梁单元的外径和厚度设为优化变量,质量和强度作为约束进行结构优化。优化结果表明:第1阶频率提高了8.66%,最大应力值降低22.14%,不仅改善了摩托车的动态特性,而且提高了其强度。Abstract ： In order to improve the riding comfort and the strength properties of motorcycle,the finite element model for a motorcycle frame is established. The computational modal analysis is conducted and then the calculated modes are compared with those obtained by experimental modal tests. Base on the modal analysis, the motorcycle frame is optimized by using the MSC. Nastran software. In the optimization, the diameter and the thickness of the beam ele- ment were taken as variables and the first-order modal frequency of the motorcycle is maximized with the strength and weight constraints. The results show that the first-order mode frequency is increased by 8.66% with a decrea- sing of the maximum stress by 22.14%.

关 键 词：摩托车车架 模态 频率 应力 优化 

分 类 号：U483[交通运输工程—载运工具运用工程]