CAJ | 학술논문

声模态测量是风扇/压气机管道声学研究的重要组成部分。测点非均布、测点数目为奇数或测量过程中传感器测量结果有误情况下，无法应用传统的分析方法分析。从最基本的声学公式入手，对管道声传播进行理论推导，得到一个通用的声模态测量分析方法，即求解方程组法。利用数值模拟方法对管道声模态进行分析，可看出模态分析的目的，是通过测点的声压进行目标频率下主要模态的识别，证明了应用解方程组法可进行测点非均布情况下的模态分析。在两个风扇试验器的声学测量中应用该种测量分析方法，从试验角度证明了分析方法的正确性和分析结果的可靠性。本文提出的声模态测量分析方法解决了传统分析方法的弊端，对风扇/压气机气动声学试验研究具有重要的意义。
성모태측량시풍선/압기궤관도성학연구적중요조성부분。측점비균포、측점수목위기수혹측량과정중전감기측량결과유오정황하，무법응용전통적분석방법분석。종최기본적성학공식입수，대관도성전파진행이론추도，득도일개통용적성모태측량분석방법，즉구해방정조법。이용수치모의방법대관도성모태진행분석，가간출모태분석적목적，시통과측점적성압진행목표빈솔하주요모태적식별，증명료응용해방정조법가진행측점비균포정황하적모태분석。재량개풍선시험기적성학측량중응용해충측량분석방법，종시험각도증명료분석방법적정학성화분석결과적가고성。본문제출적성모태측량분석방법해결료전통분석방법적폐단，대풍선/압기궤기동성학시험연구구유중요적의의。
Mode measurement is an important constituent for research on acoustics of the fan/compressor. If measurement stations are not even distributed and odd number counted, and there are errors in sensor measurement during the process, the traditional measurement analysis method could not be applied in the actual measuring process. The formula of sound propagation in the duct has been derived, and the general acoustic mode measurement analysis method-solving equations were obtained. The acoustic mode of the duct was analyzed numerically and the objective of mode analysis was obvious that through the mode recog?nization of measurement points with target frequency to prove that the method of solving equations can be applied to acoustic mode analysis when the measurement stations were not uniform. This method has been used in the two fan test facilities. The results coincide with the theory of stator/rotor interaction noise, and they are reliable. The method put forward solved the problem of traditional method, providing significance in the acoustic experimental study for fan compressor.