摘要
对穿孔板吸声结构的声学特性进行了理论分析与计算。讨论了穿孔板吸声结构的共振吸声原理,基于对穿孔板吸声结构声阻抗的讨论,分析了穿孔率、空腔深度、板厚、孔径等参数对吸声性能的影响,为穿孔板吸声结构的工程应用提供了依据。针对某工程机械风冷系统噪声突出这一现象,专门为风冷系统设计了穿孔板吸声结构,大幅度降低了该机风冷系统的噪声,也使该机的驾驶环境噪声得到了有效控制。
Theoretical analysis and calculation on the acoustic properties of perforated panel absorber were described herein. The resonance absorbing principle of perforated panel absorber was discussed. Based on the discussion about the acoustic impedance of perforated panel absorber, the analysis was conducted about the effects of the parameters, such as perforation area ratio, the depth of the cavity, the thickness of perforated panel absorber and the perforation-aperture, on its absorption characteristics. Some useful conclusions are obtained which can be a good reference for the application of perforated panel absorber in noise control engineering. Aimed at the situation that the noise of wind -cooling system was very outstanding in the noise of an engineering machinery, perforated panel absorbers were designed separately at the wind inlet and outlet. Noise of the wind-cooling system has been reduced obviously, and the noise in the driver environment is controlled effectively.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2007年第7期778-780,共3页
China Mechanical Engineering
基金
江苏省科技攻关项目(GY2004004)
关键词
穿孔板
吸声结构
声学特性
噪声控制
perforated panel
absorption structure
acoustic performance
noise control
