High-performance vibration isolation technique using passive negative stiffness and semiactive damping

Xiang Shi, Fulei Zhao, Zhidan Yan, Songye Zhu, Jin Yang Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Among active, semiactive, and passive vibration isolation methods, active control can provide the best isolation performances. However, high-energy consumption hinders its wide applications in civil engineering field. This paper proposes a novel vibration isolation technique based on a passive negative stiffness spring (NSS) and a semiactive device (SAD), aiming to achieve an active isolation performance by using a low-power semiactive technique. Due to its nature of negative potential energy, an NSS enables the semiactive isolation system to provide negative transient power flow that injects power into the structure and avoids the clipping phenomenon of semiactive control forces. Consequently, the combined NSS and SAD isolation system can perfectly generate the theoretical control forces calculated by an active control algorithm and achieve a considerably improved semiactive isolation performance. The prospects and performance advantages of the proposed NSS and SAD isolation system are validated through a series of numerical simulations of single-degree-of-freedom and multi-degree-of-freedom structures excited by various types of ground motions and a benchmark building model excited by seismic ground motions.

Original languageEnglish
Pages (from-to)1034-1055
Number of pages22
JournalComputer-Aided Civil and Infrastructure Engineering
Volume36
Issue number8
DOIs
Publication statusPublished - Aug 2021

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Computer Science Applications
  • Computer Graphics and Computer-Aided Design
  • Computational Theory and Mathematics

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