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.

中文翻译：

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使用被动负刚度和半主动阻尼的高性能隔振技术

在主动、半主动和被动隔振方法中，主动控制可以提供最好的隔振性能。然而，高能耗阻碍了其在土木工程领域的广泛应用。本文提出了一种基于被动负刚度弹簧 (NSS) 和半主动装置 (SAD) 的新型隔振技术，旨在通过使用低功耗半主动技术实现主动隔振性能。由于其负势能的性质，NSS 使半主动隔离系统能够提供负瞬态功率流，将功率注入结构并避免半主动控制力的削波现象。最后，结合NSS和SAD隔振系统，可以完美地生成由主动控制算法计算出的理论控制力，并实现了显着提高的半主动隔振性能。所提出的 NSS 和 SAD 隔离系统的前景和性能优势通过一系列由各种类型地面运动和基准建筑模型激发的单自由度和多自由度结构的数值模拟得到验证由地震地面运动激发。