汽车发动机的曲轴系统在周期性交变力作用下,产生扭转振动。当其频率与轴系固有频率相同时,就会发生共振现象,产生噪声,造成曲轴的早期磨损。如果振幅超过曲轴的许用极限时,还可能导致曲轴的断裂。本文以夏利轿车TJ376Q型汽油机为例,初步探讨了轴系的扭振现象及消除方法。 The crankshaft system of a car engine produces torsional vibrations under cyclic alternating force. When its frequency is the same as the natural frequency of the shaft system, resonance occurs, causing noise and causing early wear of the crankshaft. Crankshaft breakage may also result if the amplitude exceeds the allowable limit of the crankshaft. In this paper, Xiali sedan TJ376Q gasoline engine for example, the initial discussion of the shaft torsional vibration phenomenon and elimination methods.