Optimal design of inerter systems for the force-transmission suppression of oscillating structures  

作　　者：Zhang Ruifu Zhao Zhipeng Lin Xuchuan Zhang Lingxin 

机构地区：[1]Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China [2]Department of Disaster Mitigation for Structures,Tongji University,Shanghai 200092,China

出　　处：《Earthquake Engineering and Engineering Vibration》2022年第2期441-454,共14页地震工程与工程振动（英文刊）

基　　金：Scientific Research Fund of Institute of Engineering Mechanics,China Earthquake Administration under Grant Nos.2019EEVL03,2019D14 and 2020EEEVL0401;National Natural Science Foundation of China under Grant No.51978525;National Key R&D Program of China 2021YFE0112200。

摘　　要：When dealing with the oscillations of fixed-base structures or machines induced by external forces,suppressing the vibrational impact on the adjacent structures and the environment helps to maintain the structural durability and ensure the users′comfort level.This study proposed an inerter-based optimal solution to suppress the vibrational forces and energy transmitted to the supporting ground by utilizing the great potential of the inerter.For the external force,which contains various frequency bands,the stochastic response and an energy balance analysis are conducted to evaluate the force transmissibility,structural displacement,and vibration power flow.Given the benefits of the inerter,a transmitted-force-based optimal design framework is proposed for inerter systems,of which the effectiveness is validated by numerical examples.The obtained results show that inerter systems are capable of providing significant reductions in the structural displacement and the force transmitted to the supporting ground.Particularly,the closed-form power equation indicated that a grounded inerter can suppress the force transmission and vibrational energy,thus leading to a less negative impact on the ground and environment.Revealing the working mechanism and optimal design strategy of the inerter can help solve the force-transmission control problem experienced by some practical structures.

关 键 词：inerter transmitted force oscillating structure optimal design 

分 类 号：TU311.3[建筑科学—结构工程]