增程式变速箱的拍振现象分析

Analysis of Beat Vibration Phenomenon of Extend-range Gearbox

针对增程式电车在EV模式下工作时,发动机停止工作后,出现忽高忽低的啸叫异响,导致主观感受变差的问题,以某款增程式汽车为研究对象,通过整车测试,采用频谱分析发现为相邻两个阶次耦合产生的抱怨,通过提取相应的阶次信息,确定调制信号。并根据抱怨出现的转速及边频信息,建立相应的数学模型,通过数值模拟,研究阶次拍振形成的机理。

When the extended-range electric car works in EV mode,there will be a sudden high and low whistling noise after engine stops working,which leads to the deterioration of subjective feeling.Taking a certain extended-range electric car as the research object,through the whole process in the vehicle test,spectrum analysis is used to find the complaints generated by the coupling of two adjacent orders,and the modulation signal is determined by extracting the corresponding order information.And according to the speed and side frequency information of complaining,the corresponding mathematical model is established,and the mechanism of order beat vibration is studied through numerical simulation.