摘要
为研究湍流脉动噪声激励下复合材料层合板的传声特性,首先基于一般层合板理论将复合材料层合板等效为单层各向异性板,进而采用FE-SEA混合方法研究其传声损失。同时开展复合材料层合板传声损失试验,并将FE-SEA结果和统计能量法(SEA)结果以及实验值进行对比分析。研究结果表明:FE-SEA结果和实验值整体上分布趋势一致,而且误差也相对较小,其中3000 Hz^10000 Hz误差在2 dB以内,但由于刚度等效导致2000 Hz附近结果误差相对较大。相较于SEA方法,FE-SEA混合方法综合考虑了复合材料层合板边界条件和详细得几何特征,不仅可以准确地计算复合材料层合板的固有特性,而且使得传声损失结果在全频带内与试验值吻合得更好。因此建立的二维等效FE-SEA混合模型可以准确预示复合材料层合板在湍流脉动噪声激励下的传声损失。
The transmission loss of composite laminates under turbulent pulsating noise excitation was studied.Firstly,the composite laminates are equivalent to a single-layer isotropic panel based on general laminate theory,and the hybrid FE-SEA method is used to research the transmission loss of composite laminates.And then,the transmission loss experiment was carried out,and the results of hybrid FE-SEA method were compared with SEA and experimental results.The results show that the hybrid FE-SEA results are consistent with the distribution trend of experimental results and the error is relatively small.The error of transmission loss is within 2 dB when the frequency 3000 Hz-10000 Hz,but the equivalent of stiffness leads to a relatively large error around frequency 2000 Hz.Compared with the SEA method,the hybrid FE-SEA method comprehensively considers the boundary conditions and the detailed geometric features of the composite laminates.It not only accurately calculates the inherent characteristics of the composite laminates,but also makes the results of transmission loss well consistent with the experimental values in the whole frequency band.Therefore,the two-dimensional equivalent FE-SEA hybrid model established in this paper can accurately predict the transmission loss of composite laminates under turbulent pulsating noise excitation.
作者
王晨
燕群
周红卫
慕琴琴
WANG Chen;YAN Qun;ZHOU Hongwei;MU Qinqin(Aircraft Strength Research Institute of China,Aviation Science and Technology Key Laboratory of Aeronautical Acoustics and Vibration Intensity,Xi'an 710065,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2020年第11期226-231,264,共7页
Journal of Vibration and Shock
基金
国家自然科学基金重大研究计划项目(91860101)。
作者简介
第一作者:王晨,男,硕士,工程师,1993年生。
