Suspension bridges’ in-plane extended configuration makes them vulnerable to wind-induced vibrations. Vortex shedding is a kind of aerodynamic phenomenon causing bridge vibrate in vertical and torsional modes. Vortex-induced vibrations disturb the bridge’s serviceability limit, which not favorable, long run, they can cause fatigue damage. In this condition, vibration control strategies seem be ...

Abstract In this paper, the parameters optimization of a tuned mass damper (TMD) is presented to enhance seismic performance six-story steel structure based on ductility damage index. Herein, frame modeled nonlinearly in OpenSees software by concentrated plasticity model. Finally, most suitable algorithm selected among several algorithms convergence rate and objective function's values. process...

This paper examines a set of parametric tunings for vibration absorbers to enhance stability in the event simultaneous chatter during machining and proposes novel tuning criterion minimizing definite integral frequency response function, while accounting damping absorber’s base component. Chatter vibrations are an inherent characteristic processes, common tool mitigating is tuned mass damper (T...

Steel large-megawatts wind turbines have the light-damping and long-period properties, resulting in adverse vibrations under loads. In this paper, a novel tuned mass damper refitted via inner platform (IP-TMD) is proposed to control excessive vibration of steel turbine tower (WTT). Firstly, dynamic equation WTT controlled by IP-TMD system established according principle virtual work, its coeffi...

This paper emphasizes on the application of genetic algorithm (GA) to optimize the parameters of the TMD for achieving the best results in the reduction of the building response under earthquake excitations. The Integral of the Time multiplied Absolute value of the Error (ITAE) based on relative displacement of all floors in the building is taken as a performance index of the optimization crite...

To investigate vibration control and optimal design of transmission lines with tuned-mass-damper-inerter (TMDI), the motion equation TMDI is established in paper, closed-form solutions response spectrum line displacement are derived by frequency domain analysis method. The parameters optimized fixed-point theory, performance discussed. results show that increase apparent mass ratio has a positi...

In this study, the Tuned Mass Damper (TMD) optimization is carried out to reduce resonant motion of Submerged Floating Tunnel (SFT) under wave excitations. The SFT dynamics evaluated in frequency domain; a new approach cost-effectively optimizing TMD parameters for moored system suggested. Discrete-Module-Beam (DMB) method used model Tunnel; mooring lines are included as equivalent stiffness ma...

Abstract Inerter-based vibration absorbers (IVAs), such as the tuned-mass-damper-inerter (TMDI), have become popular in recent years for earthquake protection of building structures. Previous studies using linear structural models shown that IVAs can achieve enhanced suppression, but at expense increased control forces exerted from IVA to host structure. The authors recently developed a bi-obje...

This article proposes a design method for producing H control performance for structural systems using the Tagagi-Sugeno (T-S) fuzzy model. A structural system with a tuned mass damper is modeled using a T-S type fuzzy model. Using the parallel distributed compensation (PDC) scheme, we design a nonlinear fuzzy controller for the tuned mass damper system. A sufficient stability condition for the...

The Acoustic Black Hole (ABH) effect refers to a special vibration damping technique adapted thin-walled structures such as beams or plates. It usually consists of local decrease the structure thickness profile, associated thin viscoelastic coating placed in area minimum thickness. has been shown that structural design acts an efficient damper high frequency range, but not at low frequencies. T...