Analysis method for efficiently solving bridge vibration random characteristics of high-speed train

Abstract

The invention discloses an analysis method for efficiently solving bridge vibration random characteristics of a high-speed train. A virtual excitation algorithm is combined with a self-adaptive Gaussian integration technology, a frequency interval section with the key influence of random excitation on a coupling system is identified in a self-adaptive mode, and a critical frequency interval section is intelligently refined or a non-critical frequency interval is roughly drawn or abandoned; corresponding frequency points are found on the basis of the frequency interval section after intelligentprocessing and substituted into vehicle-bridge system coupling vibration for calculation; on the basis of dynamic responses obtained by all the frequency points, calculation results with the statistical property and the random characteristics are obtained through Gaussian integration, and the calculation results are verified through a Monte Carlo method. According to the analysis method, the calculation cost is effectively reduced, and the calculation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of high-speed train operation safety, in particular to an analysis method for efficiently solving the random characteristics of vibration of high-speed trains crossing bridges. Background technique [0002] In 1964, Japan built the world's first high-speed railway with a train speed exceeding 200 kilometers per hour, marking the advent of the modern high-speed railway era. Subsequently, France, Germany and China built a large number of high-speed railways, and achieved good economic and social benefits. In 2008, the Beijing-Tianjin intercity railway was officially opened to traffic, which heralded the official opening of the high-speed railway era in my country. With the development of high-speed railways tending to be high-speed and light-weight, in order to ensure the safety, stability and comfort of passengers in high-speed train operation, it is necessary to ensure high ride comfort, stability and relia...

AI Technical Summary

Problems solved by technology

However, the parameter matrix of the vehicle-bridge coupling system will change with the position of the vehicle on the bridge. The dynamic response can only be calculated by the time domain solution method, and then the random vibration of the system coupling vibration can be analyzed in the framework of random vibration theory. characteristic

With the complexity of the bridge structure and the continuous increase of the span and the refinement of the vehicle model, the excitation frequency range of the coupling system becomes wider, and the number of calculation frequency points increases, resulting in a long calculation time and low calculation efficiency.

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