动力反共振液压浮筏的隔振特性分析  

Analysis of Vibration Isolation Characteristics of Dynamic Anti-resonant Hydraulic Raft

作　　者：张赣波[1] 赵耀[1] ZHANG Ganbo;ZHAO Yao(School of Naval Architecture and Ocean Engineering,Huazhong University of Science&Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,武汉430074

出　　处：《中国造船》2020年第3期33-46,共14页Shipbuilding of China

摘　　要：针对传统浮筏无法隔离振动线谱的工程问题,构建一种具有反共振特性的液压浮筏,对其隔振特性进行系统研究。采用流体力学理论推导了液压浮筏的特征方程,以主从系统耦合振动视角,阐明了液压浮筏耦合系统的解耦条件,建立了可供设计分析的简化模型。揭示了液压浮筏的反共振隔振机理是在于并联了具有液压放大效应的惯性元件,在液压浮筏固有频率处的惯性力抵消了弹性力而具有极低的力传递率。基于动力调谐优化方法开展了液压浮筏动力参数优化,并讨论了相关参数和安装方式的影响。研究表明,质量比是液压浮筏隔振设计的关键参数,决定了共振峰值和隔振带宽;安装方式的影响不大,宜将液压浮筏作为第二级隔振更佳。Anti-resonant vibration isolation characteristics for a proposed hydraulic raft are studied.From the perspective of coupled vibration of master-slave system,decoupling conditions of the hydraulic raft are expounded,and a simplified model for design and analysis is established.It is revealed that the anti-resonance vibration isolation mechanism of the hydraulic floating raft is due to the fact that the inertial force counteracts the elastic force at the natural frequency of the hydraulic floating raft and has a very low force transmission rate.Based on the dynamic tuning optimization method,the dynamic parameters optimization of hydraulic floating raft is carried out,and the influence of relevant parameters and installation mode is discussed.The results show that the mass ratio is the key design parameter of the hydraulic floating raft,which determines the resonance peak value and vibration isolation bandwidth;the installation mode has little influence,and the hydraulic floating raft as the second stage of vibration isolation is better.

关 键 词：动力反共振隔振 液压浮筏 振动线谱 动力调谐优化 

分 类 号：U661.44[交通运输工程—船舶及航道工程]