中国舰船研究2017，Vol.12Issue(4)：117-121,5.DOI:10.3969/j.issn.1673-3185.2017.04.018
流激开孔和空腔结构耦合振动噪声试验研究
Experiments of opening and cavity shear flow-induced vibration and structural coupling resonance
摘要
Abstract
In order to discuss opening and cavity shear flow-induced vibration and structural coupling resonance, experiments of opening and cavity shear flow-induced vibration and structural noise control are carried out. The impact of the opening size, flow velocity and cavity thickness on shear oscillation noise, self-noise in the cavity and radiated noise are analyzed. The results show that the empirical formula of the opening shear oscillation in air is also applicable to the condition underwater, which the shear oscillation and amplitude of modal frequencies are directly proportional to the flow velocity; in case that no coupling resonance occurs, the thickness of the cavity wall will bring slight influence on the amplitude of the shear oscillation, but not on the mode frequencies; also the coupling of shear oscillatory mode and cavity wall mode show dramatic coupling resonance under certain conditions, and leads to self-noise and acoustic radiation. The findings supply useful exploration and technical support concerning the application of opening and cavity structural noise control measures.关键词
剪切振荡/弹性腔壁/耦合共振Key words
shear oscillation/elastic walls/coupling resonance分类
交通工程引用本文复制引用
熊济时,吕世金,邱昌林,王春旭,陈志刚..流激开孔和空腔结构耦合振动噪声试验研究[J].中国舰船研究,2017,12(4):117-121,5.基金项目
国家部委基金资助项目 （）
