A Frequency-Domain Analysis Method for Vehicle-Rail-Bridge Coupled Vibration Outputting Medium and High Frequency Responses

Abstract

The invention discloses a vehicle-track-bridge coupled vibrationfrequency domain model with middle and high frequency response output. The model selects vehicle-track-bridge coupled vibration simulation prediction parameters to be inputted into the vehicle-track-bridge coupled model, based on a vehicle dynamics equation and the vehicle-track-bridge coupled model to solve a wheel admittance matrix and an orbital admittance matrix respectively, lastly substitutes the solved dynamic wheel rail force into the vehicle motion equation and a track-bridge coupling model motion equation as the excitation source of vehicle model and track-bridge coupling model, and further solves the frequency domain dynamic response of the vehicle, track and bridge structures caused by dynamic wheel rail force. The vehicle-track-bridge coupled vibrationfrequency domain model with middle and high frequency response output can unveil the mechanism and influence law of vibration and energy generation and transmission of vehicle-rail-bridge, and provides theoretical basis for taking targeting measures to reduce vibration and noise.

Description

technical field [0001] The invention relates to a vehicle-rail-bridge coupled vibration frequency domain model that outputs medium and high frequency responses, which can be applied to the prediction of medium and high frequency vibration responses of elevated rail transit vehicles, tracks and bridge structures, and the above medium and high frequency responses output by the model can be As an excitation source for rail transit environmental vibration and noise prediction, it provides theoretical support for the study of rail transit environmental vibration and noise problems. Background technique [0002] With the development of social economy and the continuous advancement of urbanization, traffic problems have become increasingly prominent. As a large-capacity transportation tool, rail transit can effectively solve the problem of high-density passenger flow, and its role in promoting economic development cannot be ignored. Rail transit elevated lines occupy a large propo...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a vehicle-rail-bridge coupled vibration frequency domain model of a medium-high frequency response, to solve the traditional time-domain model when modeling and dynamic analysis of the vehicle-rail-bridge coupling system, but the time The domain model is mainly used to analyze the strength of the bridge structure when the train is running. The vibration frequency of the bridge structure concerned is usually lower than 20Hz. The frequency range is higher. If the time domain method is used to establish the vehicle-rail-bridge coupled vibration analysis model, the output response is difficult to accurately predict the environmental vibration and noise of rail transit.

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