多耐压壳体结构振动传递控制技术研究

Vibration Transmission Control of Multi Pressurized Hulls

相对单耐压壳体,由于多耐压壳体通过舷间连接结构相互耦合,受激励耐压壳体向临近的舷间结构/舷间声介质、临近耐压壳体、轻外壳等主构件传递振动,总体上呈现多路径相互叠加的树形结构,传递路径复杂。采用数值方法,通过建立多耐压壳体有限元模型,基于多耐压壳体耦合特征,分析振动传递路径上基座、激励位置、舷间结构等相关参数对多耐压壳体声学特性影响,从传递路径上开展针对性的结构声学噪声控制技术研究。分析结果可为多体结构的工程设计和振动噪声控制提供有效参考。

Compared with single pressurized hull,the multi pressurized hulls are coupled each other through the inboard connection structures.The excited hull transmits vibration to the adjacent structures such as the inboard connection structure/inter-outboard acoustic medium,adjacent pressure hulls,light shells etc.The vibration transmission generally presents a tree structure with multiple paths superimposed each other.In this paper,the finite element model of multi pressurized hulls was established by numerical method.Considering the coupling effect of the multi-body pressurized hull structures,the influence of relevant parameters such as base,excitation position and inboard connection structure on the acoustic characteristics of the multi pressurized hull was analyzed.The control technique of the structure-borne noise of the multi pressurized hull was studied in the viewpoint of vibration transmission path.The results of this study have provided an effective reference for the design and vibration control of multi-body structures.