声边界无法在内燃机机体辐射噪声预报中的应用研究

Application of Boundary Element Method to Acoustic Radiation Problems in Cylinder Blocks of Internal Combustion Engines

本文结合振动有限元法和声边界元法建立了内燃机机体辐射噪声预报模型，开发了相应的通用计算程序。复式声强测量结果表明该计算程序有较高的计算精度。是低噪声内燃机设计的基础。

An acoustic radiation model for an I.C. engine cylinder block was set up based on the FEMand BEM, and the corresponding computing program was compiled. The measuring results ofcomplex acoustic miensity show that the model and computing results are reliable. It is thefundation of low noise engine design.