基于惯容的浮筏隔振系统人工自愈技术研究  

Artificial Self-recovery Technology of Floating Raft Vibration Isolation System Based on Inerter

作　　者：李月昊 胡茑庆[1,2] 程哲[1,2] 尹正阳 黄良远 LI Yuehao;HU Niaoqing;CHENG Zhe;YIN Zhengyang;HUANG Liangyuan(College of Intelligence Science and Technology,National University of Defense Technology,Changsha 410073;Laboratory of Science and Technology on Integrated Logistics Support,National University of Defense Technology,Changsha 410073)

机构地区：[1]国防科技大学智能科学学院,长沙410073 [2]国防科技大学装备综合保障技术重点实验室,长沙410073

出　　处：《机械工程学报》2023年第18期13-21,共9页Journal of Mechanical Engineering

基　　金：国家自然科学基金资助项目(51775550,51975576)。

摘　　要：传统浮筏隔振系统为双层“质量-弹簧-阻尼”机械系统。基于机电相似理论,质量与一端接地电容对应,而惯容是与电容完全对应的双端机械元件。将惯容引入浮筏隔振系统,使浮筏动力学模型中双层质量间可产生可变惯性耦合,从而极大影响系统固有频率与隔振性能。浮筏的退化或异动会改变系统固有频率和力传递率。惯容惯质系数的增加会使浮筏固有频率降低并影响力传递率。将人工自愈的思想引入浮筏隔振系统,根据系统固有频率的监测结果来调节惯容惯质系数,将系统固有频率自主调整恢复至合适固有频率,即为基于惯容的浮筏隔振系统人工自愈技术。为验证该技术原理,搭建浮筏隔振系统实验平台,进行简谐激励扫频试验。试验结果验证基于惯容的浮筏隔振系统人工自愈技术的可行性。The conventional floating raft vibration isolation system is a double-layer“Mass-Spring-Damper”mechanical system.Based on the analogy between mechanical and electric systems,mass corresponds to capacitor with one terminal connected to the earth,and inerter is a two-terminal mechanical element corresponding to capacitor.Inerter used in the floating raft,causes the variable inertial coupling between the two layers of mass in the floating raft’s dynamic model.And it greatly influences the natural frequencies and vibration isolation performance of the floating raft.Degradation or change of floating raft can change the natural frequencies and force transmission rate of the system,while the increase of the inerter’s inertance can reduce the natural frequencies and influence the force transmission rate.Introducing the idea of artificial self-recovery into the floating raft,adjusting the inerter’s inertance according to the monitoring result of the natural frequencies,and self-adjusting the natural frequencies to a proper range.The process is called the artificial self-recovery technology of floating raft vibration isolation system based on inerter.To verify the technical principle,experimental platform is built,and the frequency sweep experiments under harmonic excitations are conducted.The experimental results verify the feasibility of the technology.

关 键 词：浮筏 隔振 惯容 滚珠丝杠惯容 人工自愈 

分 类 号：TH113[机械工程—机械设计及理论]