CAJ | 학술논문

水动力噪声沿通海管路系统经通海口直接向舰船外辐射噪声，降低舰船隐身性能。如何设计有效的管路消声器以降低舷外辐射噪声成为亟待解决的问题。文章以弹性板间隔的矩形截面通流管路与矩形背腔为几何模型，基于格林函数法和模态理论，求解包含背腔和主管声介质影响的弹性板耦合振动方程，建立了弹性板式水动力噪声消声器理论。计算结果显示，弹性板式水动力噪声消声器具有低频宽带消声性能。计算分析了消声机理以及阻尼对消声性能的影响。该文的工作为低频宽带水动力消声器原理样机的设计提供了理论依据。
수동력조성연통해관로계통경통해구직접향함선외복사조성，강저함선은신성능。여하설계유효적관로소성기이강저현외복사조성성위극대해결적문제。문장이탄성판간격적구형절면통류관로여구형배강위궤하모형，기우격림함수법화모태이론，구해포함배강화주관성개질영향적탄성판우합진동방정，건립료탄성판식수동력조성소성기이론。계산결과현시，탄성판식수동력조성소성기구유저빈관대소성성능。계산분석료소성궤리이급조니대소성성능적영향。해문적공작위저빈관대수동력소성기원리양궤적설계제공료이론의거。
Hydrodynamic noise transmits along the pipeline and radiates to the sea. The design of function-al fluid pipeline silencer is desiderated. In this paper, the model is a rectangular duct with a rectangular cavity which is partitioned by a rectangular plate. Theory on plate-silencer with low frequency and broad-band hydrodynamic noise attenuation characteristics is established by using Green function and mode method. The vibration of plate is solved considering fluid loading of cavity and duct sound medium on both sides. The results indicate that the plate silencer has low frequency and broadband attenuating characteris-tics of hydrodynamic noise. The noise attenuating mechanism is analyzed and the effect of damping on noise attenuating characteristic is investigated. The established theory and parameter research can provide a basis of design.