柔性支撑推进系统-艇体耦合系统声振特性研究  

Research on Vibro-acoustic Characteristics of Flexible Supporting Propeller-hull Coupling System

作　　者：李乐坤 秦云龙 蒋林心 张冠军 LI Lekun;QIN Yunlong;JIANG Linxin;ZHANG Guanjun(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 460036,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063

出　　处：《数字海洋与水下攻防》2024年第3期260-267,共8页Digital Ocean & Underwater Warfare

基　　金：船舶振动噪声重点实验室基金“串联多球壳组合结构耦合声振特性研究”(6142204210208);国家自然科学基金“海洋声学基础研究–噪声与振动控制”专项项目(52241102);国家自然科学基金“面向声目标的水下椭圆柱壳激励声场分布特性研究”(51909201)。

摘　　要：旨在研究柔性支撑推进系统对桨–轴–艇耦合系统振动噪声的影响。建立柔性支撑推进系统–艇体耦合系统数值模型,基于有限元/边界元法计算螺旋桨纵向、水平及垂向激励力下柔性支撑推进系统–艇体耦合系统的声振特性,并与传统支撑方案进行对比分析。结果表明:艇体较大的辐射噪声主要由轴系–筏架耦合模态导致,合理提高筏架质量和刚度有利于降低艇体辐射噪声;相较于传统支撑,采用柔性支撑可明显降低艇体的辐射噪声,其中在螺旋桨纵向激励下降低14.65 dB,水平激励下降低4.48 dB,垂向激励下降低8.36 dB。采用柔性支撑推进系统可降低艇体辐射噪声,为桨–轴–艇耦合系统振动噪声控制提供指导。In this paper,the effect of flexible supporting propulsion system on the vibration noise of propeller-shaft-hull coupling system is studied.A numerical model of the flexible supporting propeller-hull coupling system is established.The vibration and radiated noise of the hull under the longitudinal,horizontal and vertical excitation of the propeller are calculated using finite element/boundary element method,and are compared with the traditional support system.The results show that the large radiation noise of the hull is mainly caused by the coupling mode of shafting and raft frame,and it is beneficial to reduce the radiation noise of the hull by improving the mass and stiffness of raft frame.Compared with the traditional support,the flexible support can significantly reduce the radiated noise of the hull,which is reduced by 14.65 dB under the longitudinal excitation,4.48 dB under the horizontal excitation,and 8.36 dB under the vertical excitation.The use of flexible supporting propulsion system can reduce the hull radiated noise and provide support for vibration and noise control of propeller-shaft-hull coupling system.

关 键 词：桨–轴–艇耦合系统 柔性支撑 辐射噪声 

分 类 号：U664.2[交通运输工程—船舶及航道工程]