Near resonance vibration isolation on a levered-dual response(LEDAR)Coulomb-damped system by differential preloads/offsets in linear springs  

作　　者：T.I.TOLUWALOJU C.K.THEIN D.HALIM 

机构地区：[1]Department of Mechanical,Materials and Manufacturing Engineering,University of Nottingham Ningbo China,Ningbo 315100,Zhejiang Province,China [2]Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute,University of Nottingham Ningbo China,Ningbo 315048,Zhejiang Province,China

出　　处：《Applied Mathematics and Mechanics(English Edition)》2024年第6期1033-1050,共18页应用数学和力学（英文版）

基　　金：partially supported by the Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute (No. I01211200001);LDS 2023 Educational Foundation of The University of Nottingham Ningbo China (No. E06221200002)

摘　　要：The levered-dual response(LEDAR)Coulomb-damped system attains near resonant vibration isolation by differential preloads/offsets in linear springs.It takes the advantages of both the preloads/offsets in linear springs and the guiderail friction for realizing different levels of vibration isolation.The isolation capacities are investigated on the strategies with both the horizontal and vertical guiderails,with the horizontal rail only,and without guiderails.The compressive preloads generally result in the consumption of most of the initial excitation energy so as to overcome the potential threshold.The isolation onsets at the frequency ratio of 1∓0.095 on the left-hand side(LHS)and the right-hand side(RHS)of the lever are relative to the load plate connector.The observed near resonant isolation thus makes the LEDAR system a candidate for the isolation of the mechanical systems about resonance while opening a path for simultaneous harvesterisolation functions and passive functions at extreme frequencies.

关 键 词：lever ratio Coulomb damping preload tension/compression isolation band/depth offset potential 

分 类 号：O321[理学—一般力学与力学基础] O324[理学—力学]