基于波数谱分析方法的圆柱壳结构声学特性研究

IF 3.9 4区工程技术 Q1 ENGINEERING, MARINE

Brodogradnja Pub Date : 2021-06-30 DOI:10.21278/brod72204

Liu Wenxi, Guan Huiren, Zhou Qidou, Lou Jingjun

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引用次数: 5

摘要

采用有限元法计算了轴向激振力和不同分布形式的弯矩作用下的结构振动响应，并分析了均方法向速度的传递函数。采用波数谱分析方法在波数域对壳体振动进行分离和量化，总结了结构振动特性与结构波长之间的关系。结果表明，在轴向激振力和弯矩的对称作用下，结构振动和辐射噪声可以降低。基于上述结论，设计了对称推力轴承支撑系统，通过选择合适的构件尺寸控制支撑结构轴向刚度，从而显著降低了潜艇的结构振动和辐射噪声。

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STUDY ON STRUCTURAL-ACOUSTIC CHARACTERISTICS OF CYLINDRICAL SHELL BASED ON WAVENUMBER SPECTRUM ANALYSIS METHOD

By the finite element method, the structural vibration response is calculated under the action of the axial exciting force and the moment with different distribution form, and then the transfer function of the mean square normal velocity is analyzed. The wavenumber spectrum analysis method is used to separate and quantify the shell vibration in the wavenumber domain, and then the relation between the structural vibration characteristics and the structural wavelength is summarized. It is concluded that the structural vibration and radiated noise can be reduced under the symmetric action of axial exciting force and the moment. Based on the above conclusion, a symmetrical thrust bearing supporting system is designed and the stiffness of the supporting structure in the axial direction is controlled by selecting suitable size of structural members, therefore, the structural vibration and radiated noise of the submarine is reduced significantly.

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来源期刊

Brodogradnja ENGINEERING, MARINE-

CiteScore

4.30

自引率

38.90%

发文量

审稿时长

>12 weeks

期刊介绍： The journal is devoted to multidisciplinary researches in the fields of theoretical and experimental naval architecture and oceanology as well as to challenging problems in shipbuilding as well shipping, offshore and related shipbuilding industries worldwide. The aim of the journal is to integrate technical interests in shipbuilding, ocean engineering, sea and ocean shipping, inland navigation and intermodal transportation as well as environmental issues, overall safety, objects for wind, marine and hydrokinetic renewable energy production and sustainable transportation development at seas, oceans and inland waterways in relations to shipbuilding and naval architecture. The journal focuses on hydrodynamics, structures, reliability, materials, construction, design, optimization, production engineering, building and organization of building, project management, repair and maintenance planning, information systems in shipyards, quality assurance as well as outfitting, powering, autonomous marine vehicles, power plants and equipment onboard. Brodogradnja publishes original scientific papers, review papers, preliminary communications and important professional papers relevant in engineering and technology.