发动机进气系统声学性能动态灵敏度设计

Dynamic sensitivity design of acoustic property of intake system of an engine

发动机进气系统噪声是车辆最主要的噪声源之一,对车内噪声影响尤其显著。基于管道声学理论,提出了发动机进气系统噪声仿真方法——无源法;基于赫姆霍兹消声器的集中参数模型,提出了发动机进气系统声学性能动态灵敏度设计方法。应用"无源法",在不具备发动机仿真模型的情况下,仍然能进行进气系统声学性能动态灵敏度设计,通过仿真分析能够迅速准确地获得进气系统声学性能灵敏度设计信息,为进气系统声学性能优化提供依据。

The noise of intake system of an engine is one of the most important noise sources of a vehicle, and it affects interior noise more markedly. Based on the theory of pipeline acoustics, the method of noise simulation of intake system of an engine-no-source-method has been brought forward; based on the concentrative parameter model of Helmholtz resonator, the method of acoustic property dynamic sensitivity design of intake system of an engine has been brought forward. Applying nosource-method, while the emulation model of an engine could not be provided, the acoustic property dynamic sensitivity de- sign of intake system could be carry through however, the exact information of acoustic property sensitivity design of intake system could be gotten rapidly through simulation, this provides a reference for the acoustic property design of intake system optimized.