摘要
为避免车辆弹性动力学分析中自由度数多、求解方程慢的问题,运用Guyan矩阵缩减理论选出模型中能描述动力学行为的部分。运用Ritz模态向量叠加理论考虑构架的弹性变形对地铁车辆动力学行为的影响。用车辆系统的位形坐标与构架的模态坐标建立刚—柔混合多体系统动力学模型,使自由度得到缩减。从而较快得到地铁车辆具有构架弹性振动的动力学响应,其结果与刚体动力学模型相比有明显差别。
In order to avoid a large number of DOF (degree of freedom) and time-consuming solution of equations in vehicle elastic dynamics analysis, the Guyan matrix reduction theory is used to select that part of the model that presents dynamic behavior. Ritz modal vector superposition theory is applied to consider the effect of the elastic deformation of the bogie on the motion of subway vehicle. Dynamics model of mixed stiff-elastic multi-body system is set up in the vehicle configuration coordinate systems and bogie modal coordinate systems so that the DOF is reduced and vehicle dynamic response along with bogie elastic vibration is attained faster than before. The results are distinctly different from that of a stiff dynamics model.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2004年第4期42-45,共4页
China Railway Science
基金
四川省科学技术研究项目(2001)
关键词
构架
Guyan矩阵缩减
模态分析
动力学响应
Bogies (railroad rolling stock)
Deformation
Degrees of freedom (mechanics)
Dynamic response
Elasticity
Finite element method
Modal analysis
Vibrations (mechanical)
