【摘要】 为了研究典型高速铁路简支箱梁桥-车辆耦合系统的自振特性,采用有限元方法,基于Midas-Civil软件建立了高速铁路简支梁车桥耦合有限元模型,分别考虑单桥模型、车桥耦合模型以及不同墩高等工况,计算得到了各工况模型的自振频率及振型变化。研究表明,高铁列车荷载和墩高的变化对车桥耦合系统自振特性均会产生较大的影响,车桥系统地震响应分析中应综合考虑不同影响因素的作用。更多还原

【Abstract】 In order to study natural vibration characteristics of high-speed railway simply-supported box girder bridges and vehicle coupling systems,the high-speed railway simply supported bridge and train coupling model has been established by Midas-Civil based on the finite element method. The natural vibration frequency and vibration mode has been calculated considering single bridge model and vehicle-bridge coupling model with different pier height,the basic frequency range of the coupling system has been also given. Studies have shown that,changes of train load and pier height cause great effect to the coupling system,and different influencing factors should be considered in the seismic analysis of the coupling system.更多还原