摘要
采用模态综合法建立车桥时变系统耦合振动模型,导出该系统的总质量矩阵、总阻尼矩阵和总刚度矩阵的计算表达式,并考虑移动车载所产生的附加矩阵。通过算例研究附加矩阵对系统耦合振动响应的影响。结果表明:在不考虑桥面不平顺时,无论车辆是低速还是高速行驶,附加矩阵对桥梁振动响应的影响很小,可以忽略;但附加矩阵对车辆振动响应的影响很明显,有时偏差高达30%,不可忽略。
The coupling vibration model of variational coefficient vehicle - bridge system was established using the mode synthesis method, The expressions of general mass matrix, general damp matrix and general stiffness matrix to vehicle - bridge system were deduced, and the additional matrices resulting in moving vehicle loads were considered. The effect of additional matrices on coupling vibration response of vehicle - bridge system was studied with examples. The results show that, without considering track structure irregularity, whether the vehicle runs at a low speed or a high speed, the effect of additional matrices on vibration response of bridge system is very weak and negligible, but its effect on vibration response of vehicle system is evident and significant, sometimes with a warp of 30%.
出处
《铁道科学与工程学报》
CAS
CSCD
2009年第3期36-41,共6页
Journal of Railway Science and Engineering
基金
国家自然科学基金资助项目(50678176)
铁道部科技研究开发计划项目(2003G043)
关键词
车桥时变系统
耦合振动
模态综合法
振动响应
variational coefficient vehicle- bridge system
coupling vibration
modal synthesis method
response of vibration
