基于实验模态研究的新型节流降压喷注复合消声器  

NEW TYPE OF THROTTLING DEPRESSURIZATION INJECTION COMPOSITE MUFFLER BASED ON EXPERIMENTAL MODAL ANALYSIS

作　　者：周新祥[1] 刘成[1] 胡光宇 赵宝生[1] 类兴隆[1] 韩梦达[1] 

机构地区：[1]辽宁科技大学机械工程与自动化学院,辽宁鞍山114051

出　　处：《环境工程》2013年第4期140-143,113,共5页Environmental Engineering

基　　金：2007年度国家自然科学基金项目(10602001)

摘　　要：针对节流降压小孔喷注复合消声器进行实验模态研究。由采集力的激励信号和响应信号,对其进行传递函数分析,寻找消声器所有的模态频率和模态振型。这些频率避开了噪声的峰值频率,消声器不易发生共振,抑制噪声辐射,延长消声器的使用寿命。它对寻找消声器的实际特性,设计性能优良的新型消声器提供可靠的参考依据。According to micropore jet composite muffler which can throttle and reduce pressure,this paper uses hammering method to do experimental modal analysis on specific model muffler specimen.By gathering force excitation signal and response signal,the transfer function is analysed,all the modal frequencies and modal vibration modes of the muffler specimen are obtained.These frequencies are away from peak frequency of the noise.Therefore,the muffler can not have resonant response at peak frequency,so it can restrain noise radiation and extend the usable life of the muffler.Experimental modal analysis can provide reliable reference for finding the actual characteristics of the muffler.

关 键 词：喷注噪声 锤击法 实验模态 复合消声器 

分 类 号：TB535.2[理学—物理]