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| Test study on vibration behavior and bearing load characteristics of high-speed train gearbox under internal excitation |
| ZHOU Yue1, WANG Xi1, HOU Yu1, QUE Hongbo1,2, GUO Rubing2, LIN Xinhai2,JIN Siqin2, WU Chengpan2 |
1. School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;
2. CRRC Qishuyan Locomotive and Rolling Stock Technology Research Institute Co., Ltd., Changzhou 213011, China |
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Abstract Internal excitation is an important factor affecting the vibration of high-speed EMU gearbox and the dynamic load of gearbox bearing. Based on the gearbox transmission system test rig, the vibration response of the gearbox body and the bearing load of the gearbox were tested under various torque and speed conditions for high-speed EMU. The vibration signals of different parts of the gearbox under various operating conditions are analyzed, and it is found that the gear meshing frequency at specific rotation speeds can excite the modal resonance of the gearbox, while the torque can affect the frequency response characteristics of the system. Order tracking are performed on the gearbox vibration acceleration responses under increased rotation speed, and modal parameters of the gearbox are obtained through the order-based operational modal identification method, it is found that the operating mode vibration pattern of the gearbox cause the difference in vibration behavior at different rotation speeds. By comparing the root mean square of gearbox vibration acceleration and the measured bearing load coefficient of variation under different operating conditions, the correspondence between the dynamic characteristics of gearbox bearing load and gearbox vibration behavior is established.
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Received: 09 August 2022
Published: 15 July 2023
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