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一、前言发动机受力后引起表面振动而产生噪声。引起发动机表面振动的激振力主要有:气压力、气阀落座冲击力、活塞侧向冲击力和惯性力。
First, the foreword After the engine caused by surface vibration caused by noise. Excitation force caused by the vibration of the engine surface are: gas pressure, gas valve seating impact, piston lateral impact force and inertial force.