基于模态与遗传优化的某卡车振动特性分析  

Vibration Characteristics Analysis and System Optimization of Vehicle Based on Genetic Algorithm and Moda

作　　者：张袁元[1] 李舜酩[1] 刘晓伟[1] 杜建建[1] 安木金[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《南京航空航天大学学报》2011年第6期841-845,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(50675099)资助项目;江苏省普通高校研究生科研创新计划(CX10B-094Z)资助项目

摘　　要：针对汽车驾驶室在常用高速(65～80 km/h)时,驾驶室左右晃动的振动问题,分别建立了车体、车体与板簧的系统模型,通过试验和仿真计算得到了其自由与约束状态下的振动模态分布,找到了驾驶室产生晃动的主要原因。以板簧刚度、车体刚度为变量,将约束模态分析与遗传算法相结合,对板簧和车体组成的系统进行了优化,并通过改进使常用车速下的驾驶室响应达到了舒适性要求。In order to deal with the heavy swing and vibration of cab when the vehicle is at high speed（from 65 km/h to 80 km/h）.The finite element models of frame-body,the system of frame-body and springs are firstly established.Then according to the result of free modal and constraint modal analysis both from simulation and experiments,the distribution of modals and the cause of cab swaying are achieved,which shows that the running state of frame-body is affected by.Lastly,based on the previous work,the vibration response of cab at various speed is optimized by means of the genetic algorithm with variable spring stiffness and frame-body stiffness.

关 键 词：振动 模态 优化 遗传算法 

分 类 号：U463.32[机械工程—车辆工程] U467.3[交通运输工程—载运工具运用工程]