Numerical and experimental analysis of a vibration isolator equipped with a negative stiffness system

被引：84

作者：

Palomares, E. ^{[1
]}

Nieto, A. J. ^{[1
]}

Morales, A. L. ^{[1
]}

Chicharro, J. M. ^{[1
]}

Pintado, P. ^{[1
]}

机构：

[1] Univ Castilla La Mancha, Dept Mech Engn, Avda Camilo Jose Cela S-N, E-13071 Ciudad Real, Spain

来源：

JOURNAL OF SOUND AND VIBRATION | 2018年 / 414卷

关键词：

Negative stiffness; Nonlinear dynamics; Vibration isolator; DESIGN;

D O I：

10.1016/j.jsv.2017.11.006

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper presents a Negative Stiffness System (NSS) based on a set of two double-acting pneumatic linear actuators (PLA). The NSS is added to a system with a single degree of freedom, which consists of a sprung mass and a pneumatic spring. One end of each PLA is jointed to the sprung mass while the other end is jointed to the vibrating frame. In addition, the PLAs are symmetrically arranged so that they remain horizontal while the sprung mass is in static conditions. When the rear chamber is pressurised, the vertical component of the force applied by the PLAs will work against the pneumatic spring reducing the dynamic resonance frequency of the overall system. Experimental tests and simulations showed improvements regarding sprungmass isolation in comparison to the passive system without NSS, decreasing the resonance frequency by up to 58% and improving the vibration attenuation for different experimental excitations. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：31 / 42

页数：12

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