软支承条件下车辆—基础系统的动力学建模与分析  

Dynamic Simulation and Analysis of the Vehicle-foundation System with Nonlinear Soft Supports

作　　者：朱怀亮[1] 胡开封[2] 余磊[2] 谢严[2] 

机构地区：[1]上海大学力学系,上海200444 [2]上海市应用数学和力学研究所,上海200072

出　　处：《南昌大学学报（工科版）》2007年第3期212-214,238,共4页Journal of Nanchang University(Engineering & Technology)

基　　金：上海市自然科学基金资助项目(03ZR14032);上海大学研究生培养基金

摘　　要：研究软支承下的车辆-基础系统耦合动力学响应.将基础视为有限个离散点支承的Euler-Beinoulli梁,支承则模拟为具有非线性、不对称特性的弹性元件和阻尼器,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,根据动力学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 the dynamic response of the vehicle-foundation system with nonlinear soft supports. The foundation of vehicle is modeled as a multi-span Euler-Beinoulli beam on nonlinear, asymmetric supports and dampers. The nonlinear characteristics of supports and dampers are simulated by piecewise-linear method, and equations of motion of the system are formulated using Lagrange principle and assumed mode method. Nu- merical simulations are performed for some sample problems and the transient responses of vehicle-foundation system are discussed. It shows the difference in dynamic behavior of multi-span beams between the linear and nonlinear supports and dampers.

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]