车载作用下箱形截面梁振动特性的瞬态动力学分析

论文根据磁浮交通道岔梁的结构及受力特点，通过建立合理的瞬态动力学数值模型，把列车作为高速运行的荷载动态作用于道岔梁上。采用瞬态拟动力学方法模拟钢结构梁动力响应特性。研究了道岔梁上关键点位置相应的振幅、反应加速度及其时效特性。通过计算比较精确地获得工程实际中最为关注的梁的最大振动位移和加速度。研究成果可为高速磁浮实际工程设计提供借鉴。

Numerical analysis of transient dynamical response to high-speed load of steel box beam

Based on the analysis of the large-scale steel box beam's load and its structure form, a reasonable transient calculative model was found in this paper. Then the authors analyze the steel box beam's transient response to the train load which is considered as the high-speed moving uniformly distributed load applied to the steel box beam by the finite element method. To simplify the vibration attribute, the authors select a series of key nodes and analyzed their vibration attribute and the time when the maximum displacement, velocity or acceleration that we care about mostly happens. The results may be used to the real engineering such as magmetic train.