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以新建的某铁路货运专线上的反向曲线上的小半径曲线桥梁为例,考虑列车曲线通过的特点及轮轨非线性相互作用,建立空间的列车和曲线桥梁的振动方程,运用模态叠加法求解振动方程。通过车桥耦合振动专用分析程序VBC2.0的数值分析,得出列车通过该反向曲线上小半径曲线梁桥的一些振动规律,并给出我国货运列车通过该桥梁的合理行车速度及其他建议。
Taking the small radius curved bridge on the reverse curve of a newly built freight trains as an example, taking into account the characteristics of the train passing curve and the nonlinear interaction of the wheel and rail, the space vibration equation of the train and curved bridge is established. By using modal superposition Solve the vibration equation. Through the numerical analysis of VBC2.0, which is a special analysis program of the coupling vibration of the axle, the vibration law of the train passing the curve of small radius curve on the reverse curve is obtained, and the reasonable driving speed of the freight train passing through this bridge is given. .