Inerter

Experimental study and numerical modeling of nonlinear dynamic response of SDOF system equipped with tuned mass damper inerter (TMDI) tested on shaking table under harmonic excitation

This paper considers a novel shaking table testing campaign to assess the tuned mass-damper-inerter (TMDI) vibrations suppression attributes in harmonically excited structures under the combined effect of nonlinear structural response and nonlinear inerter device behavior deviating from the ideal linear inerter element developing acceleration-dependent force proportional to the inertance constant.

A generalized 2-DOF model for optimal design of MDOF structures controlled by Tuned Mass Damper Inerter (TMDI)

The paper illustrates a methodology to perform the optimal design of a Tuned Mass Damper Inerter (TMDI) equipped on a multi degree of freedom (MDOF) structure through a generalized model. The TMDI is considered in both configurations grounded and ungrounded. A generalized 2-DOF model is obtained: the primary oscillator, representing the original MDOF structure and the secondary oscillator, representing the control system. A Gaussian zero mean white noise random process is adopted for the excitation.

Vibration control of steel liquid storage tanks equipped with Inerter-based isolation systems

Base isolation represents a very widely used strategy to mitigate the effects of earthquake excitation on structures. However, it can induce high displacements between the isolation
layer and the ground, which may cause serious damage, and even heavy and dangerous consequences in case of industrial components. Among them, big steel tanks for storage of petroleum
or other chemical products, should be considered very carefully. Moreover, isolation technique

Optimal tuning and assessment of inertial dampers with grounded inerter for vibration control of seismically excited base-isolated systems

In this paper, the concept of an ideal grounded linear inerter, endowing supplemental inertia to passive linear tuned mass-dampers (TMDs) through its inertance property without increasing the TMD mass, is considered to reduce lateral displacement demands in base isolated structural systems (BISs). Optimal tuned mass-damper- inerter (TMDI) design parameters are numerically determined to maximize energy dissipation by the TMDI under stationary white noise support excitation.

Modal analysis and dynamic response of a two adjacent single degree of freedom systems linked by spring-dashpot-inerter elements

This paper illustrates the dynamics of a novel structural configuration represented by a two adjacent single-degree-of-freedom (2-ASDOF) systems coupled by a connection with spring-dashpot-inerter elements arranged in parallel. The connection is conservative if the link is realized only with spring and/or inerter, whereas becomes nonconservative when also the dashpot is added. The first part of the study concerns the system modal analysis: different linking schemes are considered in order to investigate the influence of each connection parameter on the coupled system modal properties.

Defective two adjacent single degree of freedom systems linked by spring-dashpot-inerter for vibration control

The paper deals with the analytical formulation of two adjacent single degree of freedom systems coupled by spring-dashpot-inerter elements adequately tuned in order to build a defective system. From modal analysis analytical expressions of eigenvalues, damping factor and connection parameters in order to build defective systems are given. It is demonstrated that is always possible to realize a defective system when a connection with spring-dashpot-inerter elements is utilized, irrespectively of the assumed structural parameters.

© Università degli Studi di Roma "La Sapienza" - Piazzale Aldo Moro 5, 00185 Roma