高速铁路简支梁桥参数变化对竖向共振影响分析
Analysis on the vertical resonance effect of simply-supported beam bridge parameters on High-speed railway

基于列车-轨道-桥梁系统有限元分析理论,利用弹性系统动力学总势能不变值原理及形成系统矩阵的“对号入座”法则,得到列车-板式轨道-简支梁桥系统竖向矩阵形式的运动方程,分析高速铁路简支梁桥结构参数变化对桥梁竖向共振的影响。计算表明桥梁质量、刚度、阻尼比等参数变化对简支梁桥共振有重要影响。该结果对于优化高速铁路简支桥梁结构设计参数,提高列车运行安全系数具有参考价值。
Based on the finite element analysis theory of the vertical vibration on train-slab track-bridge system, this paper obtained the vertical dynamic equation of high-speed train-slab track-bridge system, with the help of the principle of total potential energy with stationary value in elastic system dynamics and the "set-in-right-position" rule for formulating matrices.The inflence of the railway simply supported beam bridge structure parameter on the bridge vertical resonance was analyced voriation of the numerical results show that bridge’s span, damping, stiffness and quality parameters changes have an important impact on bridge vertical resonance. The results can provide a reference for optimizing the High-speed railway Simply-supported bridge structure and improving the safety factor of train operation