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为研究高速列车通过简支梁时,简支梁的振动,一列火车被模拟成等间隔轮荷载的两个子系统组合,一个子系统由所有的前轮组组成,另一个子系统由所有的后轮组组成。用一种分析方法,利用动载假定,可以确定控制梁的动态响应的主要参数。为了求得运动车辆惯性作用的值,用纽马克β法可求得其数值解。基于对于在梁上连续运动荷载产生的波的谐振和消去条件,有效的最佳的设计准则是建议抑制谐振响应。高速铁路桥梁的设计中,在火车的车长、轴距、运行速度给定的情况下,选择梁的跨长和横截面应该考虑这一准则。
In order to study the vibration of a simply supported beam when a high-speed train passes through a simply supported beam, a train is modeled as a combination of two subsystems loaded with equal-interval wheels, one subsystem consisting of all front-wheelsets and the other subsystem consisting of all rear Wheel group. With an analysis method, using dynamic loading assumptions, the main parameters governing the dynamic response of the beam can be determined. In order to obtain the value of the inertia of the sport vehicle, the numerical solution can be obtained by using the Newmark β method. Based on the resonance and cancellation conditions for the waves generated by the continuous moving loads on the beam, the most effective design criterion is to suppress the resonance response. In the design of high-speed railway bridges, this principle should be considered when selecting the length and cross-section of the beam given the length, wheelbase and operating speed of the train.