Mitigating jacket offshore platform vibration under earthquake and ocean waves utilizing tuned inerter damper

Effect of earthquake directional uncertainty on the seismic response of jacket-type offshore platform

In the seismic risk assessment of structures, two main random variables are involved, namely the vulnerability of the structure and the seismic action. The aim of the study presented here is to analyze the seismic behavior of the jacket-type offshore platforms as an expensive and vital structure. Furthermore, the influence of the incidence angle of the seismic action is also investigated by usi...

بررسی رفتار دینامیکی سکوهای فراساحلی شابلونی مجهز به سیستم میراگر مایع تنظیم شده تحت تحریک لرزه‌ای

In the present paper, the effectiveness of Tuned Liquid Damper (TLD) in controlling the dynamic responses of offshore jacket platforms under earthquake excitation is investigated. This type of dampers consisting of one or more fluid (generally water) containers can be installed on the platform’s deck. Hydrodynamic actions induced by the tilting of the water surface in the container act as...

Vibration suppression of cables using tuned inerter dampers

This paper considers the use of a tuned inerter damper (TID) system for suppressing unwanted cable vibrations. The TID consists of an inerter, a device that exerts a force proportional to relative acceleration, coupled with a parallel spring and damper. It may be thought of as similar to a tuned-mass-damper, but requiring two terminals. As a two terminal device, the performance of the TID is co...

Study of Fixed Jacket Offshore Platform in the Optimization Design Process under Environmental Loads

In the structural optimization problem, the aim is to decrease the amount of structural costs and weight, but the safety of platform should not violate the individual limits enforced by offshore codes. The outer diameter and thickness of members are two important variables in the optimization process and their final dimensions should be obtained according to the optimization algorithms such as ...

Assessing the effect of nonlinearities on the performance of a tuned inerter damper