船舶双层底结构吸振阻振方案设计  

Design and Test of Vibration Absorption and Blocking Scheme for Ship Double Bottom Structure

作　　者：李浩然[1,2] 向阳[1,2] 李飞[1,2] 李著新[1,2] LI Hao-ran;XIANG Yang;LI Fei;LI Zhu-xin(School of energy and power engineering,Wuhan University of Technology,Wuhan 430063,China;Key Laboratory of Marine Power Engineering and Technology,Ministry of Transport,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学能源与动力工程学院,武汉430063 [2]武汉理工大学船舶动力工程技术交通运输行业重点实验室,武汉430063

出　　处：《船海工程》2021年第6期60-65,71,共7页Ship & Ocean Engineering

基　　金：国防预研基金(10204010410)。

摘　　要：为了解动力吸振器和阻振质量对船舶双层底结构的振动控制效果,设计双层底板架结构模型并建立其有限元模型,搭建以离心泵为激励源的试验台架,通过测试与仿真分析确定吸振器的吸振频率和安装位置,采用有限元功率流法确定主要传递路径并继而确定阻振质量的布置位置,分析吸振阻振方案对试验台架的振动控制效果,发现24 Hz不仅是离心泵振动的主要峰值频率,也是双层底板架结构外底板振动的主要峰值频率;24 Hz下的振动主要传递路径位于离心泵进水口侧下方的实肋板和底桁;实施吸振阻振控制方案后,试验台架外底板在24 Hz处的平均振动加速度级降低了5.84 dB。In order to study the vibration control effect of dynamic vibration absorber and blocking mass on ship double bottom structure,the structure model of double floor frame was designed and its finite element model was established.The test bench with centrifugal pump as the excitation source was built,and the vibration absorption frequency and installation position of the vibration absorber were determined through testing and simulation analysis.The power flow finite element method was adopted to determine the main transfer path and then determine the placement of blocking mass.The vibration control effect of the vibration absorbing and isolating scheme on the test bench was studied.It was found that 24 Hz is not only the main peak frequency of centrifugal pump vibration,but also the main peak frequency of outer floor vibration of double floor frame structure.The main vibration transmission path at 24 Hz is located at the plate floor and bottom girder below the inlet side of the centrifugal pump.After adopting the vibration absorbing and blocking control scheme,the average vibration acceleration level of the outer floor of the test bench at 24 Hz is reduced by 5.84 dB.

关 键 词：振动控制 双层底板架结构 动力吸振器 有限元功率流 阻振质量 

分 类 号：U661.44[交通运输工程—船舶及航道工程] TB532[交通运输工程—船舶与海洋工程]