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In order to solve the problem of excessive low frequency road noise of a vehicle model, this paper used the dynamic stiffness method of working load identification to derive the correlation between body side force and chassis attachment point transfer function, body attachment point transfer function and bushing dynamic stiffness parameters. On this basis, the road noise simulation model of the whole vehicle was established, and the contribution of the transmission path was analyzed. The torsion beam bushing was identified as the main transmission path. By reducing the stiffness parameters of the bushing, the force on the body attachment point was improved, so as to reduce the noise inside the vehicle. The real vehicle verification results show that the low frequency low dynamic stiffness and high damping hydraulic bushing can improve the low frequency road noise problem in the vehicle, and improve the impact residual vibration performance.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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