摘要
应用有限元思想,以汽车八自由度模型为研究对象将汽车振动结构离散,规定节点的位移属性,给出单元变换方法,按照节点位移在结构总位移向量的位置组装汽车振动结构方程的系数矩阵,采用强迫位移约束处理的方法,建立能够求解的汽车振动数学模型。将建立数学模型的方法与虚拟激励法结合,实现汽车行驶平顺性的仿真。结果表明,建模与仿真方法简单,易于工程应用。
Taking vehicle eight--degree of freedom model as an example, vehicle vibration structure was discreted based on ideas of finite element. Attributes of node displacement were prescribed and method of element transform was given. Factor matrixes of vehicle vibration equation were assembled according to positions of node displacements in vector of structure general displacements. Method of bind disposal was taken according to method of constrain displacement disposal, then mathematical model of vehicle vibration was constructed, which could be solved for displacement responses. The method for construction of mathematical model was connected with pseudo--excitation method, simulation of vehicle ride comfort was carried out. Results show that the method of constructing mathematical model and simulation is simple and easy for engineering applications.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第13期1625-1629,共5页
China Mechanical Engineering
基金
国家863高技术研究发展计划资助项目(2006AA1101022006AA110104)
关键词
行驶平顺性
汽车振动结构
数学建模
虚拟激励法
位移属性
ride comfort
vehicle vibration structure
mathematical modelling
pseudo--excitation method
attribute of displacement
