【摘要】 结合有限元法和声边界元法建立了发动机油底壳辐射噪声预测模型 ,开发了相应的计算程序 ,在多点激励条件下 ,对油底壳进行了噪声预测 .试验结果表明该方法有较高的计算精度 ,为发动机噪声优化设计打下了良好的基础 .更多还原

【Abstract】 A model for predicting the radiation noise from the engine sump was constructed and software was developed by Finite Element Method and Boundary Element Method. The radiation noise of a sump with multi-point excitation was predicted. The experiment results indicated that this calculation method was precise, providing a good basis for the optimized design of the engine with low noise.更多还原