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To describe the coupling effect of multiple nonlinear factors on the torsional vibration of pure electric vehicles, a full-vehicle torsional vibration model with time-varying meshing force is established. 3 nonlinear factors exist in gear meshing. They are time-varying meshing stiffness, gear backlash and transmission error. This work analyzes their physical characteristics and their influence on meshing force. A time-varying meshing force equation is formulated. The permanent magnet synchronous motor model couples with the transmission torsional vibration model containing time-varying meshing force. A complete electromechanical coupling simulation model for the whole vehicle is built. Numerical calculation obtains the torsional vibration responses of the vehicle. The coupling influence of multiple nonlinear factors on dynamic characteristics of each vehicle component is systematically analyzed. The results show that under the coupling of multiple nonlinear factors, the peak value of time-varying meshing force rises by 17.46%. The frequency-domain response of the differential increases by 30.6%. The dynamic response of vehicle body angular acceleration changes from predictable to unpredictable.
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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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