基于等效源法和双面质点振速测量的声场分离方法  

Sound field separation technique based on equivalent source method and double-layer particle velocity measurements

作　　者：朱杨柱[1] 易仕和[1] 陈植[1] 葛勇[1] 王小虎[1] 付佳[1] 毕传兴[1] 胡定玉[1] 张永斌[1] 徐亮[1] 

机构地区：[1]合肥工业大学噪声振动工程研究所,合肥230009

出　　处：《物理学报》2013年第8期267-275,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11274087,11004045);高等学校博士学科点专项科研基金(批准号:20100111110007)资助的课题~~

摘　　要：目前基于等效源法的声场分离方法有两种输入方式,一种以双测量面上的声压为输入,另一种以单测量面上的声压和质点振速为输入.本文以双测量面上的质点振速为输入,提出一种新的基于等效源法的声场分离方法.首先给出了该方法的理论推导,然后通过数值仿真和实验验证了该方法的有效性.通过与基于双面声压测量的声场分离方法的比较,证明了该方法在分离质点振速方面的优越性.此外,在仿真中还研究了干扰声源强度和测量面间距对分离精度的影响.Two sound field separation techniques based on equivalent source method are proposed： one is based on the double-layer pressure measurements and the other is based on the single-layer pressure-velocity measurements. In this paper, a sound field separation technique based on equivalent source method but using the double-layer velocity measurements is proposed. First, the theoretical description of this technique is given, and then numerical simulations and experiments are conducted to demonstrate the validity of this technique. By comparison with the technique based on double-layer pressure measurements, the superiority of the proposed technique in separating particle velocity field is shown. And also, in the numerical simulations, the influences of the strength of disturbing source and the distance between two measurement planes on separation accuracy are investigated.

关 键 词：声场分离 质点振速测量 等效源法 近场声全息 

分 类 号：V223[航空宇航科学与技术—飞行器设计]