Footbridges are generally slender and lightweight structures with low stiffness, designed to support dynamic loads generated by crowds. Therefore, these exposed vibration problems related the resonance of human walking step frequencies lower modes. To mitigate problems, one most applied corrective strategies is installation tuned mass damper (TMD) systems that aim at reduction footbridge’s domi...

Tuned mass dampers (TMDs) are widely implemented in many types of structures, such as tall buildings, wind turbines, towers, and bridges, to enhance the structural performance subjected seismic loading. In present study, we aim comprehensively investigate effectiveness TMD, by performing vulnerability assessment a 20-story steel building equipped with TMD considering soil-structure interaction ...

Floating offshore wind turbines (FOWTs) are generally located in the harsh deep-sea environment and highly susceptible to extreme loads. In order ensure normal operation of FOWTs, this article takes semi-submersible FOWT as an example, proposes a new double-rope mooring system, studies dynamic performance with system its effectiveness reducing response turbine. At same time, tuned mass damper (...

In this paper, passive structural control techniques are applied to a barge-type Floating Offshore Wind Turbine (FOWT) mitigate the impact of pendulum effect loads. The device, tuned mass damper (TMD) installed in nacelle, is analyzed on reduced dynamics FOWT model. Genetic algorithms used for optimization process, taking tower fatigue as fitness function, implemented standard deviation fore-af...

This paper aims to achieve vibration suppression for multi-component floating structures under ocean waves. To this end, a multiple-passive-TMD (tuned mass damper) structure is employed, and numerical model developed incorporating both the dynamics of hinged foundation passive TMDs. A data-driven parameter optimization method search optimal TMD parameters. built upon Bayesian Ascent (BA) – an a...

To reduce the adverse vibrations of buildings, tuned mass dampers (TMDs), which are most representative passive control devices, have been widely used and studied in aerospace, machinery, civil engineering, other fields for many years. Most scholars to treat TMD as a linear damper, but they show some nonlinear characteristics owing use limit devices large displacements. It is necessary consider...

this paper deals with new method for designing the tuned mass dampers (tmd) with considering both transient and steady state responses, simultaneously. this formulation is presented for undamped vibrations. for this purpose, the absolute value of the structural displacement ratio is minimized numerically. this procedure leads to optimum value of tmd's specifications. for numerical verification,...