中国铁道科学2011，Vol.32Issue(2)：41-47,7.
基于桥梁基准有限元模型的列车-桥梁空间耦合振动分析
Train-Bridge Spatial Coupling Vibration Analysis Based on the Baseline Finite Element Model of the Bridge
摘要
Abstract
At the background of Wuhan Tianxingzhou highway-railway combined bridge, the initial finite element model based on its design drawings was updated by real modal identification parameters of the bridge obtained via the ambient vibration testing before its opening, then a baseline finite element model reflecting the real dynamic characteristics of the bridge was acquired. The train-bridge spatial coupling vibration equation was established based on this baseline finite element model. The spatial coupling vibration of the vehicle-bridge system under different running cases of vehicle was analyzed by modal synthesis method, and the comfort and safety of train operation were evaluated. The results show that all the dynamics index of the vehicle running on the bridge can meet the specification, and the safety and comfort are fairly good. The maximal lateral and vertical displacement of the midspan is 1.52 and 10. 5 cm respectively, and the corresponding vertical and lateral deflection-span ratio is 1/4 800 and 1/33 158,which indicates that all meet the railway code requirement and the bridge has enough vertical stiffness and transverse stiffness.关键词
桥梁/基准有限元模型/环境振动/车桥耦合/模态分析分类
交通工程引用本文复制引用
肖祥,任伟新..基于桥梁基准有限元模型的列车-桥梁空间耦合振动分析[J].中国铁道科学,2011,32(2):41-47,7.基金项目
国家"八六三"计划项目(2009AA11Z101) （2009AA11Z101）
