Nonlinear response of a multidirectional negative-stiffness isolation system via semirecursive multibody dynamic approach  

作　　者：Wei Dai Biagio Carboni Giuseppe Quaranta Yongjun Pan Walter Lacarbonara 

机构地区：[1]College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing,China [2]Department of Structural and Geotechnical Engineering,Sapienza University of Rome,Rome,Italy

出　　处：《International Journal of Mechanical System Dynamics》2024年第3期258-277,共20页国际机械系统动力学学报（英文）

基　　金：RETURN Extended Partnership,Grant/Award Number:D.D.1243 PE0000005;China Scholarship Council,Grant/Award Number:202206050096;PRIN 2022,Grant/Award Number:2022TH5HC2;PRIN 2022 PNRR,Grant/Award Number:P20227KKF5。

摘　　要：This paper investigates an innovative negative-stiffness device(NSD)that modifies the apparent stiffness of the supported structure for seismic isolation.The NSD comprises a lower base on the bottom and a cap on the top,together with a connecting rod,vertical movable wall,and compressed elastic spring,as well as circumferentially arranged,pretensioned external ropes,and inclined shape memory wires.This configuration can deliver negative stiffness and energy dissipation in any direction within the horizontal plane.A numerical model of the device is developed through a two-step semirecursive method to obtain the force–displacement characteristic relationship.Such a model is first validated through comparison with the results obtained via the commercial software ADAMS.Finally,a large parametric study is performed to assess the role and the influence of each design variable on the overall response of the proposed device.Useful guidelines are drawn from this analysis to guide the system design and optimization.

关 键 词：multibody system negative stiffness semirecursive approach seismic protection vibration isolation 

分 类 号：TH12[机械工程—机械设计及理论]