Negative stiffness devices for vibration isolation applications: A review

• Published in: Advances in structural engineering Vol. 23; no. 8; pp. 1739 - 1755
• Main Authors: Li, Huan, Li, Yancheng, Li, Jianchun
• Format: Journal Article
• Language: English
• Published: London, England SAGE Publications 01.06.2020
• Subjects: base isolation; vibration isolation; negative stiffness damper; seismic protection; negative stiffness
• DOI: 10.1177/1369433219900311
• ISSN: 1369-4332

In recent years, negative stiffness vibration isolation device with nonlinear characteristic has become an emerging research area and attracted a significant amount of attentions in the community due to the promising potentials it brought into the field. Its high-static-low-dynamic stiffness property endows the capacity to realize effective vibration isolation and in the meantime to maintain the system stability. This article presents a comprehensive review of the recent research and developments on negative stiffness vibration isolation device. It begins with an introduction on the concept of negative stiffness and then provides a summary and discussion regarding the realization and characteristics of negative stiffness vibration isolation device. The article places its special interest on the principles, structure design, and device characterisation of different types of negative stiffness vibration isolation devices, including spring type, pre-bucked beam type, magnetism type, geometrically nonlinear structural type, and composite structural type. Besides, the applications of negative stiffness vibration isolation device, as well as negative stiffness damper, are summarized and discussed based on the current state-of-the-art. Finally, the conclusions and further discussion provide highlights of the investigation.