Pitch Motion Response of an Equipped Semi-Submersible Platform with Tuned Sloshing Dampers

Mostafa Gharabaghi, Ahmad Reza; Emami, Arefeh

doi:10.22034/ijcoe.2019.149317

Pitch Motion Response of an Equipped Semi-Submersible Platform with Tuned Sloshing Dampers

Authors

Sahand University of Technology

10.22034/ijcoe.2019.149317

Abstract

Tuned sloshing dampers (TSDs) are applied to dissipate and absorb vibrational energy in structures. They can become an appropriate candidate for damping vibration in rotating offshore structures. In this study, the TSD systems are utilized in a semi-submersible platform in order to suppress its pitch motion response. First, the hydrodynamic behaviors of two different types of vessels are evaluated including a typical GVA4000 semi-submersible rig, and a floating oil storage tank using a finite element analysis. The results are compared with the available data from previous research, which the agreement is good. Subsequently, the semi-submersible platform equipped with four TSDs, which are located inside the bilge of pontoons and filled with 20% water is analyzed. It is analyzed in the frequency domain by considering the effect of internal fluid sloshing of TSDs. The results show that TSDs play a significant role for reducing the pitch motion response of the semi-submersible platform.

Keywords

20.1001.1.25382667.2019.4.1.6.4

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