Abstract
In the case of sandglass-type floating bodies (STFBs), small water-plan area with low metacentric height may limit their dynamic stability. One strategy to solve this problem is to use damping appendages. Therefore, the main objective of the present paper is to study the effects of the heave damping plate (as a horizontal plate), and flap (as an oblique plate) on the dynamic response of STFBs. To achieve this accomplishment, a STFB is numerically simulated in a numerical wave tank (NWT) in an open-source package of OpenFOAM. CFD results are compared with experimental and other numerical data, an acceptable accuracy is achieved. The main results of the current study show that using damping appendages has significant effects on control of the heave and pitch motions of the STFB. The most acceptable dynamics of this floating structure is also achieved for STFBs using flap with approximately 30% less heave motion and about 20% less pitch motion compared to the original version.
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