Flow-Induced Vibration Hybrid Modeling Method and Dynamic Characteristics of U-Section Rubber Outer Windshield System of High-Speed Trains

Author:

Yu Yizheng12,Lv Pengxiang134,Liu Xiao134,Liu Xiang134

Affiliation:

1. Key Laboratory of Traffic Safety on Track, School of Traffic & Transportation Engineering, Central South University, Ministry of Education, Changsha 410075, China

2. National Rail Vehicle Engineering R&D Center, CRRC Changchun Railway Vehicles Co., Ltd., Changchun 130062, China

3. Joint International Research Laboratory of Key Technologies for Rail Traffic Safety, Changsha 410075, China

4. National and Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha 410075, China

Abstract

The flow-induced vibration characteristic of the U-section rubber outer windshield structure of high-speed train is the key factor to limit its high-speed movement. Accurate and effective flow-induced vibration analysis of windshield structures is an important topic. In this paper, a hybrid modeling method for the analysis of flow-induced vibration of windshield structure is innovatively proposed for the U-section rubber windshield system of high-speed train. The method uses the external aerodynamic load obtained by aerodynamic simulation as the input condition of the flow-induced vibration model, and maps the aerodynamic load to the structural dynamics model characterized by the modal test data of the windshield structure. The flow-induced vibration model is established by means of modal superposition method and the time-domain response is effectively integrated by Runge Kutta method with variable step size. The results show that this method can effectively simulate the flow induced vibration of the wind baffle structure, and the real-time relationship between the aerodynamic load and the modal characteristics of the structure and the response of displacement and velocity can be obtained. On this basis, the comprehensive dynamic performance of the windshield system of high-speed trains at 400 km/h under external aerodynamic load is studied, that is, the force, displacement and velocity variation rules of the flexible structure are examined. It is determined that the displacement and velocity response curve of the measuring point near the lower side of the U-section rubber outer windshield is significantly higher than that of other parts. Moreover, the contribution of the first mode to the dynamic response of the structure is very obvious. This method provides an efficient calculation method for analyzing the flow-induced vibration characteristics of complex flexible structures.

Funder

Science and Technology Research and Development Program of China National Railway Group Co., Ltd.

National Natural Science Foundation

Fundamental Research Funds for the Central Universities of Central South University

Publisher

MDPI AG

Subject

Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science

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