某款摩托车发动机噪音大的优化改进

Optimization and Improvement of the Noise of Motorcycle Engine

某发动机在实验阶段反应整体声音比较大,经过测试分析和CAE模拟计算分析发现影响发动机噪音大的主要原因是气缸体的结构刚度比较差和活塞对气缸体的敲击力比较大导致。通过优化气缸体的结构模态和优化活塞的型线,减少敲击力,从而降低了发动机的整体噪音。

An engine has large noise and sound during the testing process. After the testing analysis and CAE stimulation calculation, we can find that the main reason is the poor rigidity of the cylinder block and the strong knocking of piston on the cylinder block. Through the optimization of the structure modal and the model line of piston, the knocking and the overall noise of the engine can be reduced.