Vibration energy of vehicle-rail-bridge vertical coupled system considering fastener temperature frequency variation

被引：0
作者：
Liu L. [1 ]
Li H. [1 ]
Qin J. [1 ]
Zuo Z. [1 ]
Meng X. [1 ]
机构：
[1] MOE Engineering Research Center of Railway Environmental Vibration and Noise, East China Jiaotong University, Nanchang
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 01期
关键词：
Fraction voigt and maxwell model in parallel model (FVMP); Power flow; Temperature frequency variation characteristics; Vehicle-rail-bridge coupled vibration; Vibration energy;
D O I：
10.13465/j.cnki.jvs.2022.01.021
中图分类号：
学科分类号：
摘要：
Through constant frequency and variable temperature tests of fasteners, combined with the temperature frequency equivalence principle and the high-order fractional derivative FVMP model, the temperature frequency variable dynamic model of a fastener was established, and the new model was used to simulate fasteners in a vehicle-rail-bridge coupled system. Based on the power flow method, effects of fasteners' temperature frequency variable dynamic properties on vibration energy distribution and transmission of the vehicle-rail-bridge coupled system were systematically analyzed and evaluated. The results showed that considering frequency variation of fastener dynamic parameters can increase vibration energy of the rail structure in medium frequency range and high frequency one, while that has a smaller impact on vibration energy of the rail structure in low frequency range, and that has a larger impact on vibration energy transmitted from rail to track plate, but that has a smaller impact on bridge vibration energy transmission; decrease in temperature can increase vibration energy of the rail structure and vibration energy transmitted from rail to track plate in medium frequency range and high frequency one after 61 Hz, but that has a smaller impact on bridge vibration energy transmission; fastener temperature frequency variation has a larger impact on vibration energy distribution of the rail structure, but has a smaller impact on energy transfer of under-rail structure; temperature frequency variation characteristics of fasteners must be considered when solving vibration energy during rail-bridge coupling, otherwise it is difficult to accurately predict vibration energy distribution characteristics of rail structures. © 2022, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：161 / 168
页数：7
相关论文
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