【作者】 李鋆； 马骁晨； 胡宇安； 宋昊； 李建龙；

【Author】 LI Jun;MA Xiao-chen;HU Yu-an;SONG Hao;LI Jian-long;CSSC Systems Engineering Research Institute;College of Information Science & Electronic Engineering,Zhejiang University;

【机构】 中国船舶工业系统工程研究院； 浙江大学信息与电子工程学院；

【摘要】 提出了一种局域实尺度模型辐射声功率矢量测量方法。该方法针对局域实尺度模型,利用矢量水听器进行声信号的采集,并通过矢量声强面积分计算,获得模型敷设阵列消音器前后的辐射声功率及辐射声功率插入损失,从而估计得到阵列消音器的抑振性能。在大型压力消声水罐中开展了阵列消音器100 Hz-1000 Hz频段的测量实验,并将本文所提出方法的测量结果与传统声压法的测量结果进行了比较。结果表明,本文提出的矢量测量方法具有测量频带宽、低频段测量误差小的优势,尤其在300 Hz以下,弥补了声压法的缺陷,获得了更为可靠的测量结果。本文提出的测量方法,对于局域实尺度模型辐射声功率插入损失的测量具有一定的现实指导意义。更多还原

【Abstract】 A vector method on measuring the radiated sound power for scaled model is proposed.Aiming at the scaled model,the acoustical signal is recorded using vector hydrophone and processed by forming the surface integral of the normal component of the sound intensity vector,and then the radiated sound power of the scaled model covered by arrayed muffler or not will be calculated.The radiated sound power insertion loss of the scaled model is computed using the obtained radiation sound powers,and the performance of vibration suppression is evaluated.An experiment of the arrayed muffler during the frequency 100 Hz-1000 Hz was carried out in the large pressure anechoic tank.The measurement result using the proposed method is compared with that using pressure method.The results show that the vector measurement method proposed in this paper has the advantages of measuring frequency bandwidth and low frequency band measurement error,especially below 300 Hz,which makes up for the defects of pressure method and obtains more reliable measurement results.The method proposed in this paper has certain realistic guiding significance in the radiated-sound-power measurement for scaled model.更多还原