基于齿轮基胞元的动力吸振器设计及船体减振研究
Design of dynamic vibration absorber with gear-based metacell and its research on hull vibration reduction
冯朔 1夏利娟 1李振荣1
作者信息
- 1. 上海交通大学海洋工程国家重点实验室,上海 200240;高新船舶与深海开发装备协同创新中心,上海 200240
- 折叠
摘要
船体结构在复杂激励下易产生剧烈振动,且传统动力吸振器工作频带较窄,缺乏普遍适用性.基于齿轮基胞元的刚度可调特性,构建一种新型半主动式动力吸振器.利用齿轮基胞元的理论力学模型,推导了单个胞元的刚度解析公式,并结合动力学模型和有限元法,对齿轮基动力吸振器的移频特性和吸振性能展开分析,结果显示新型动力吸振器调频范围广且具有良好的减振效果.经有限元仿真计算,探究了吸振器质量变化对船体减振效果的影响,可为相关减振设计提供有益参考.
Abstract
Hull vibration under complex excitation poses great harm.Traditional dynamic vibration absorber(DVA)lacks of universal applicability because of its narrow working band.Based on the adjustable stiffness of gear-based metacell,a new type of semi-active DVA was proposed.Using the mechanical model,the analytical formula for calculating the meta-cell's stiffness was derived.Based on the dynamic model and FEM,the frequency shift characteristics and vibration absorp-tion performance of the gear-based DVA were analyzed.The results show that the DVA has a wide frequency tuning range and a good damping effect.Through the FEM simulation,the influence of the DVA's mass on the damping effect of the ship hull is explored,which can provide a useful reference for the relevant vibration reduction design.
关键词
胞元结构/动力吸振器/船体振动/减振分析Key words
cell structure/dynamic vibration absorber/hull vibration/vibration reduction analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据