船用离心风机壳体振动噪声优化研究  

Research on the vibro-acoustic coupling optimization of marine centrifugal fan volute casing

作　　者：张建华 楚武利[2,3] 杨晓彤 张晶辉 ZHANG Jianhua;CHU Wuli;YANG Xiaotong;ZHANG Jinghui(School of Aircraft,Xi'an Aeronautical University,Xi'an 710072,Shaanxi,China;School of Power&Energy,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China;Collaborative Innovation Center of Advanced Aero-Engine,Beijing 100191,China;Key laboratory of road construction&equipment of MOE,Chang’an University,Xi’an 710064,Shaanxi,China)

机构地区：[1]西安航空学院飞行器学院,陕西西安710129 [2]西北工业大学动力与能源学院,陕西西安710072 [3]先进航空发动机协同创新中心,北京100191 [4]中国航发西安航空发动机有限公司,陕西西安710021

出　　处：《声学技术》2020年第3期334-341,共8页Technical Acoustics

基　　金：国家自然科学基金重点资助项目(51236006);陕西省教育厅自然科学基金青年基金资助项目(2018JK0410)。

摘　　要：当风机进出口连接长管道时,其外部辐射噪声主要是内部非定常流动诱发蜗壳振动产生的振动噪声。风机壳体的振动噪声是典型的流固干涉噪声,通常基于非定常流场获得振动激励源。为了控制此类噪声,通过振动噪声数值计算方法,并结合试验设计方法(Design of Experiment, DOE),给出了一种以壳体各板块厚度(前板TF,侧板TS,后板TB)为设计变量、以壳体振动辐射声功率为目标函数的单目标优化方法。研究表明,当保持壳体质量不变时,优化后,壳体表面辐射声功率均有不同程度降低,壳体表面基频辐射声功率降幅最大,达到6.23 dB。When the inlet and outlet of fan system is connected with long pipelines,the structural vibration noise is the main component of the external radiated noise.In fact,the fan casing noise induced by unsteady flow is a typical fluid-solid coupling noise,and the vibration source is usually obtained by the unsteady flow field.To control the vibration noise of fan volute casing,a vibration noise optimization control method based on the Design of Experiment(DOE)method is proposed,the thicknesses of the volute walls,including front-wall thickness-TF,side-wall thickness-TS,and back-wall thickness-TB,are taken as design variables,and the acoustic power on the volute surface is taken as the optimal objective function.The study shows that when the volute total mass remains constant,the radiated sound power on the surface of volute can be reduced to some extent after optimization,and the maximum reduction of 6.23 dB appears at the fundamental frequency.

关 键 词：离心风机 非定常流动 振动噪声数值计算方法 试验设计方法 单目标优化 

分 类 号：U661.44[交通运输工程—船舶及航道工程]