Large noise of vehicle engines can influence driving comfort.So noise reduction is necessary.In this work, the vibration response and radiation noise of the cylinder head cover of a diesel engine are predicted based on simulation analysis and structural acoustic radiation theory. By identifying the weakness of vibration, the optimization direction is determined, and the structure improvement scheme is put forward.The results show that the vibration response of the top surface of the cylinder head cover is large, and the total acoustic power level is reduced by 5.81 dB(A) after the improvement.It means that the effect of the noise reduction scheme is obvious.
Key word:acousticssimulation analysiscylinder head coverboundary elementstructural optimizationde-noising
国家科技期刊平台
NSTL
万方数据
维普
