Dynamics of 1D mass–spring system with a negative stiffness spring realized by magnets: Theoretical and experimental study  

作　　者：Akintoye Olumide Oyelade Ziwei Wang Gengkai Hu 

机构地区：[1]School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China

出　　处：《Theoretical & Applied Mechanics Letters》2017年第1期17-21,共5页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(11472044,11221202,11632003,11521062);the 111 Project(B160030)

摘　　要：Realization of negative stiffness （NS） in damping low frequency acoustic and mechanical vibration is relevant in engineering applications. In this work, assemblage of two repelling magnets was used to produce negative magnetic spring （NMS）. A mass-spring system with NMS is experimented where the free and forced vibrations of the system are examined. The anti-phase movement is observed due to the presence of proposed NMS, confirming the analytical solution. We further showed the dynamics of the system containing NS spring could also be derived from Hamilton＇s principle.Realization of negative stiffness （NS） in damping low frequency acoustic and mechanical vibration is relevant in engineering applications. In this work, assemblage of two repelling magnets was used to produce negative magnetic spring （NMS）. A mass-spring system with NMS is experimented where the free and forced vibrations of the system are examined. The anti-phase movement is observed due to the presence of proposed NMS, confirming the analytical solution. We further showed the dynamics of the system containing NS spring could also be derived from Hamilton＇s principle.

关 键 词：Negative stiffness Magnets Interaction 

分 类 号：TB12[理学—工程力学]