Purpose

In this study, the dynamic responses of railway track multi-layer beam structure system under a moving load, which is connected by Winkler springs, are analyzed.

Procedure

It is noted that since track structure beams with consistent boundary conditions in mathematical sense have the same mode, the mode decomposition can be carried out in the same way. By adopting this approach, the dynamic coupling equations of track structure multi-layer beam system with the same vibration mode under a moving load can be decoupled. The closed vibration solutions of the displacement of the beams at each layer of the track system are presented and some are obtained by observing the form of solutions.

Results

The track structure multi-storey beam system model can be further used in the analysis of track system structural displacement, as well as the high-speed railway system and railway-bridge coupled system dynamics.

Conclusion

It is found that the multi-layer system of CRTS-II simply supported beam bridge system and CRTS-II track system can be degenerated into triple simply supported beams with Winkler connection and double free beams on Winkler foundation, which is of great significance to engineering practice.

中文翻译：

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基于模态分解的移动荷载作用下轨道系统多层梁结构动力分析

目的

本研究对由温克勒弹簧连接的铁路轨道多层梁结构系统在移动荷载作用下的动力响应进行了分析。

程序

需要注意的是，由于数学意义上边界条件一致的轨道结构梁具有相同的模态，因此模态分解可以以相同的方式进行。采用这种方法可以解耦同一振动模态的轨道结构多层梁系统在移动荷载作用下的动力耦合方程。给出了轨道系统各层梁位移的闭振动解，部分是通过观察解的形式得到的。

结果

轨道结构多层梁系统模型可进一步用于轨道系统结构位移分析，以及高速铁路系统和铁桥耦合系统动力学分析。

结论

发现CRTS-II简支梁桥系统和CRTS-II轨道系统的多层体系可以退化为Winkler连接的三重简支梁和Winkler基础上的双自由梁，对工程具有重要意义。实践。