CAJ | 학술논문

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.
목전기우등효원법적성장분리방법유량충수입방식,일충이쌍측량면상적성압위수입,령일충이단측량면상적성압화질점진속위수입.본문이쌍측량면상적질점진속위수입,제출일충신적기우등효원법적성장분리방법.수선급출료해방법적이론추도,연후통과수치방진화실험험증료해방법적유효성.통과여기우쌍면성압측량적성장분리방법적비교,증명료해방법재분리질점진속방면적우월성.차외,재방진중환연구료간우성원강도화측량면간거대분리정도적영향.
@@@@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.