基于有限元-抛物方程混合模型的气泡幕降噪效果研究  

The noise reduction effect of air bubble curtain based on the finite elementparabolic equation method mixed model

作　　者：李坤炬 林巨[1] 王欢[1] 吴晓洁 LI Kunju;LIN Ju;WANG Huan;WU Xiaojie(Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学,青岛266100

出　　处：《应用声学》2023年第2期226-236,共11页Journal of Applied Acoustics

摘　　要：针对以往气泡幕降噪效果研究中气泡幕模型设置过于理想,无法真实反映气泡幕降噪效果空间不均匀性的问题,该文采用有限元-抛物方程混合模型对包含气泡幕的水下打桩噪声场进行了仿真模拟,分析了应用气泡幕时打桩噪声的传播特性,并重点研究了气泡幕的厚度、占空比以及布放位置等不同参数下气泡幕的降噪效果。结果表明,增加气泡幕的厚度可有限提高气泡幕的降噪量,气泡幕的占空比应保持在0.5%1%,气泡半径较大的气泡幕在较低频率有更好的降噪效果,此外应合理调整气泡幕的布放位置以应对打桩噪声的多途传播特性。该文方法和分析研究结果对打桩施工时气泡幕的参数设置具有指导意义和一定应用参考价值。In order to solve the problem that the air bubble curtain model is too ideal to reflect the spatial heterogeneity of the noise reduction effect of the air bubble curtain in the previous research on the noise reduction effect of the air bubble curtain,the finite element-parabolic equation method(FEM-PE)mixed model is used to simulate the noise field of underwater piling with air bubble curtain.The propagation characteristics of piling noise when applying air bubble curtain were analyzed,and the noise reduction effect of air bubble curtain under different parameters such as thickness,air-volume fraction and placement position of air bubble curtain was studied.The results show that increasing the thickness of the air bubble curtain can improve the noise reduction of the air bubble curtain to a limited extent,the air-volume fraction of the air bubble curtain should be maintained at 0.5%–1%,and the air bubble curtain with larger bubble radius has better noise reduction effect at lower frequencies,and the placement position of the air bubble curtain should be reasonably adjusted to cope with the multi-path propagation characteristics of the piling noise.The method and analysis results of this paper have guiding significance and certain application reference value for the parameter setting of the bubble curtain during piling construction.

关 键 词：气泡幕 打桩 水下噪声 抛物方程 有限元分析 

分 类 号：O427.9[理学—声学]