基于混合FE-SEA方法的加筋板宽频隔声预计  

Prediction of Broadband Sound Insulation of Stiffened Panels Based on Hybrid FE-SEA Method

作　　者：彭涛 韩鹏程 刘兴强[1] 燕群[1] 邹学锋[1] 戚志民[1] PENG Tao;HAN Peng-cheng;LIU Xing-qiang;YAN Qun;ZOU Xue-feng;QI Zhi-min(Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity,Aircraft Strength Research Institute of China,Shaanxi Xi'an 710065,China)

机构地区：[1]中国飞机强度研究所航空声学与振动航空科技重点实验室,西安710065

出　　处：《装备环境工程》2022年第9期32-38,共7页Equipment Environmental Engineering

基　　金：航空科学基金(20200015023003)。

摘　　要：目的预测有限尺寸加筋平板结构宽频范围内的隔声特性,指导飞行器结构声学设计。方法基于混合FE-SEA方法,对单向加筋平板结构开展宽频隔声预计。同时,在标准声学试验室对其进行隔声测试,并将FE-SEA法预计结果与测试结果、SEA方法计算结果进行对比分析。结果与SEA法相比,混合FE-SEA方法在50 Hz~10 kHz频带内的预计结果与试验结果更为吻合,其更适用于宽频隔声预计;在400 Hz~10 kHz的中高频段内,FE-SEA方法预计结果与试验结果基本相同;在50 Hz~400 Hz的低频段内,FE-SEA方法预计结果略高于试验结果,且随频率降低,偏差会逐渐增大。结论进行加筋板结构声学设计时,为了获得精确的宽频隔声预计结果,可首先选用FE-SEA方法。FE-SEA方法预计结果在中高频段可直接使用,在低频段仅能作为参考,使用时应当进行修正。This paper aims to predict the broadband sound insulation characteristics of finite size stiffened plates and guide the acoustic design of the aircraft.The hybrid FE-SEA method is used to predict the acoustic characteristics of unidirectional stiffened plate structures.At the same time,the sound insulation test is carried out in a standard acoustic laboratory.Then,the predicted results of FE-SEA are compared with the test results and SEA calculation results.The results show that,I)compared with the SEA method,the predicted results of the FE-SEA method are more consistent with the experimental results in 50 Hz~10 kHz;II)the predicted results of the FE-SEA method are basically the same as the experimental results in the middle and high-frequency band(400 Hz~10 KHz);III)the predicted results of FE-SEA method are higher than the measured results in the low-frequency band(50 Hz~400 Hz),the lower the frequency,the greater the deviation.In the acoustic design of stiffened plates,the FE-SEA method should be preferred in order to obtain high-precision broadband sound insulation prediction results.The predicted results of the FE-SEA method can be used directly in the medium-frequency band and high-frequency band,and can only be used as a reference in the low-frequency band,Which should be corrected if it was used.

关 键 词：加筋板 混合FE-SEA法 隔声预计 宽频 飞行器 

分 类 号：TJ85[兵器科学与技术—武器系统与运用工程]