高速电动汽车动力系统建模与车身优化

Electrical powertrain modelling and bodywork optimization of high-speed electric vehicle

针对世界最快电动汽车展开研究。建立车辆系统动力学模型、传动系统模型、制动系统模型,对能量存储、电能转换、机电能量转换等方面进行计算,使高速电动汽车在直线加速赛中能够获得超过640 km/h的时速。动力系统台架实验是保证整车动力性能优劣的决定因素,将仿真模型与实验台架相结合构建半实物仿真实验平台,可实现对整车动力性能的全面模拟。在对车身结构的优化过程中,将驾驶员视野作为首要考虑的因素,通过优化挡风玻璃倾斜角、护舷高度,增大驾驶员视野。车尾结构优化可降低压差阻力,进一步提升车辆行驶安全性能。

The world’s fastest electric vehicle was researched.The vehicle dynamics model,driveline model,braking system model was established and the energy storage,electrical energy conversion,electromechanical energy conversion was calculated which make the high-speed electric vehicle achieves more than 640 km/h in straight-line acceleration races.The bench test is the decisive factor to ensure the performance of the vehicle.The simulation model and the test bench are combined as semi-physical simulation test platform which can realize the power performance of the whole vehicle.In the process of optimizing the body structure,the driver’s field of view was taken as the primary consideration.It is increased by optimizing the angle of windshield inclination and fender height.The optimization of the rear structure reduces the differential pressure resistance and further improve the safety performance.