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In order to evaluate the Clunk noise level of pure electric passenger vehicle under the condition of sudden pressing/releasing of the accelerator pedal (tip in/tip out) in the early stage of vehicle product development, a multi-body dynamic model of the vehicle is established considering the clearance between the splines, shaft teeth, half shaft ball cage and bearings in the transmission system. The time-domain load of the bearings is calculated using the model, and the time-domain vibration acceleration signal of the key points on the reducer housing is obtained by combining the finite element analysis method. The accuracy of the model is verified by comparing it with the experimental results. An analysis model for Clunk noise in the transmission system and a parameter tuning method are proposed to evaluate the Clunk noise level of pure electric passenger vehicles in the early planning stage.
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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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