, Volume 52, Issue 3, pp 651-657
Date: 24 Feb 2009

Effects of volumetric allocation on heave response of semisubmersible in deep sea

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Abstract

The configuration of semisubmersibles consisting of pontoons and columns and their corresponding heave motion response in incident progressive waves are examined. The purpose of the present study is to provide a theoretical approach to estimating the effects of volumetric allocation on natural period and response amplitude operator (RAO) in heave motion. We conclude that the amplitude of heave motion response can be considerably suppressed by appropriately adjusting volumetric allocation so that the natural heave period keeps away from the range of wave energy. The theoretical formulae are found in good agreement with the corresponding computational results by WAMIT.

Supported by the collaboration project between CNOOC & CAS and 863 Project of Ministry of Science and Technology of China (Grant No. 2006AA09A103)