非线性不对称弹性支承车辆-基础系统动力学建模  

DYNAMIC SIMULATION OF A VEHICLE-BASE SYSTEM WITH NONLINEAR AND NONSYMMETRIC SUPPORTS

作　　者：朱怀亮[1] 余磊[1] 胡开封[1] 谢严[1] 

机构地区：[1]上海大学力学系,上海200444

出　　处：《振动与冲击》2008年第4期131-133,142,共4页Journal of Vibration and Shock

基　　金：上海大学研究生培养基金;上海市自然科学基金

摘　　要：研究软支承下的车辆—基础系统动力学建模问题。将基础模拟为具有多个非线性、不对称弹性支承和阻尼器约束的Euler-Beinoulli梁,利用分段线性化方法描述弹性支承的非线性刚度和阻尼特性,根据Hamilton原理和假设振型方法建立系统的运动方程,基于Newmark直接积分方法编制MATLAB二次开发函数,数值求解系统动力学响应,分析了支承约束非线性对系统动力学特性的影响。A method is presented for dynamic response of a vehicle-base system with nonlinear and non-symmetric supports.The vehicle is considered as a rigid system with elastic suspension components,and the base is modeled as a multi-span beam with nonlinear and asymmetric supports and dampers.The nonlinear characteristics of supports and dampers are simulated with the piecewise-linear method,and the equations of motion of the system are formulated using Hamilton principle and the assumed mode method.Numerical simulations are performed for some sample problems and the transient responses of the vehicle-base system are discussed.The difference in the dynamic behaviors between linear and nonlinear supports and dampers in the mult-span beam is shown.

关 键 词：非线性 不对称 动力学 瞬态响应 

分 类 号：O322[理学—一般力学与力学基础] O39[理学—力学]