Abnormal Vibration Analysis of Low-floor Tram
For the 100% low-floor tram with five modules, the vertical stability index was abnormal at 40 km/h speed. In order to explore the cause, the field test was carried out. The test result indicated that the eccentric frequency of the wheel resonates with the natural modal frequency of the tram. Then t...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2020-09-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128x.2020.04.121 |
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| Summary: | For the 100% low-floor tram with five modules, the vertical stability index was abnormal at 40 km/h speed. In order to explore the cause, the field test was carried out. The test result indicated that the eccentric frequency of the wheel resonates with the natural modal frequency of the tram. Then the PolyMax algorithm was used to identify the modal parameters, and the vertical natural mode with the main frequency of 5.85 Hz was obtained, which was presented as the nodding and floating between the five car-bodies. By establishing a vehicle dynamics model, the influence of the wheel on the different eccentricity is analyzed, and the vertical ride comfort is greatly improved by optimizing parameters of inter-vehicle longitudinal damper and secondary vertical damper. When the damping is 24 MN·s/m and the node stiffness is 20~30 MN/m in the secondary vertical damper, the vertical stability index is about 1.9, which can basically eliminate the influence of abnormal vibration. |
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| ISSN: | 1000-128X |