摘要
将移动单元法理论推广到无砟轨道的动力学研究当中,建立了新的列车-无砟轨道-路基耦合系统模型。模型离散为轨道单元和车辆单元,下部离散了的轨道单元模型采用移动单元法理论求出其单元质量矩阵,阻尼矩阵和刚度矩阵,上部车辆单元离散为一节整车模型,利用有限元和Lagrange方程计算出车辆单元的质量矩阵,阻尼矩阵和刚度矩阵。该计算模型有程序编制简单,计算速度快,消除边界影响等优点,给出了整车通过完全平顺和考虑轨道不平顺两种情况的动力响应的两个算例。
In this paper, a new moving element method is extended to the dynamical analysis of slab tracks and a new model of vehicle-slab track-subgrade coupling system is presented. The whole model is only required to discrete into vehicle elements and slab ballastless track elements. Via moving element method, the associated stiffness matrix, mass matrix and damping matrix for track element are deduced for these track elements. And the vehicle element model has 26 degrees of freedom. Based on Lagrange equation, the corresponding stiffness matrix, mass matrix and damping matrix are formulated. This model has the advantages of simple programming, efficient computing speed and eliminating border effect. The two different dynamic responses with and without track irregularity are investigated.
出处
《华东交通大学学报》
2011年第6期12-16,120,共6页
Journal of East China Jiaotong University
基金
国际科技合作与交流专项项目(2010DFA82340)
国家自然科学基金项目(50978099)
关键词
移动单元法
有限元法
车辆单元
轨道单元
振动特性
moving element method
finite element method
vehicle element
track element
vibration characteristic
