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| Tests for effect of track vibration reduction measures in a depot on vibration and noise reduction of a superstructure |
| WANG Yigan1, LIU Penghui1, LI Teng2, ZHOU Zheng1 |
1.Railway Engineering Research Institute,China Academy of Railway Sciences Co., Ltd., Beijing 100081, China;
2.Beijing Jiuzhouyigui Shock and Vibration Isolation Co., Ltd., Beijing 100070, China |
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Abstract 9 kinds of track structures were tested at the original position of the 20th track in a depot of Beijing Metro.The vibration reduction effect of 8 kinds of track structures and the denoising effect of secondary structure noise indepot’s superstructure were analyzed contrastively.According to the test data of structural vibration and structural noise, the relationship between structural vibration and secondary structure noise was analyzed, and the prediction formulafor secondary structure noise based on structural vibration was verified.The research indicated that structural vibration and secondary structure noise caused by train passingin superstructure of subway depot have high consistency in frequency domain; secondary structure noise can be predicted according to vibration speed of floor; due to differences of weight calculation methods and frequency calculation ones, there are differences in numerical expression of vibration reduction value and structural noise reduction one;in practical engineering, reasonable track vibration reduction measures should be selected according to the actual vibration and noise spectral characteristics.
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Received: 23 May 2019
Published: 28 October 2020
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