基于等效源法的单全息面分离声场研究  

Study on Sound Field of Single Holographic Surface Separation based on Equivalent Source Method

作　　者：田湘林[1] 楼京俊[2] TIAN Xianglin;LOU Jingjun(School of Power Engineering,Naval Engineering University,Wuhan 430033,China;Research Department,Naval Engineering University,Wuhan 430033,China)

机构地区：[1]海军工程大学动力工程学院,武汉430033 [2]海军工程大学科研部,武汉430033

出　　处：《噪声与振动控制》2018年第4期23-26,共4页Noise and Vibration Control

摘　　要：近场声全息能高分辨率地重构声场,但是其所要求的严格的自由声场条件在工程上很难得到满足,声场分离的方法能虚拟出自由声场,扩大了近场声全息技术的应用范围。目前的声场分离方法对声源要求有较多的先验知识,一定程度上阻碍了近场声全息技术的应用。文章根据声波等效源法的原理提出一种新的单全息面分离声场方法,无需目标声源和噪声源的先验知识,即可对声场进行分离,达到虚拟消声的效果。通过理论推导证明了方法的正确性,通过数值仿真验证了该方法的可行性。Near-field acoustic holography can reconstruct the sound field with high resolution,but its strict condition is difficult to be satisfied in engineering.The method of sound field separation can make up the free sound field so that the application range of the near-field acoustic holography technique is expanded.Currently,the method of sound field separation requires more prior knowledge of the sound source and is inconvenient for the application of the near-field acoustic holography to engineering.In this paper,a new method of single holographic surface separation sound field based on the principle of acoustic equivalent source method is proposed.The sound field can be separated without the prior knowledge of the target sound source and the noise source.The theoretical derivation ensures the correctness of the method,and the numerical simulation verifies the feasibility of this method.

关 键 词：声学 等效源法 单全息面 声场分离 重采样 

分 类 号：TH165.3[机械工程—机械制造及自动化]