Original scientific paper

A STUDY ON THE TWO-ROW EFFECT IN THE SLOSHING PHENOMENON

Sang Beom Lee ; Pusan National University, Global Core Research Center for Ships and Offshore Plants, Busan, Republic of Korea
Hyun Yi Kim ; Daewoo Shipbuilding & Marine Engineering Co., Ltd, Hydrodynamics R&D Group, Seoul, Republic of Korea
Jun Soo Park ; Kyungnam University, Dpt. Naval Architecture, Ocean and IT Engineering, Changwon, Republic of Korea
Sun Hong Kwon ; Pusan National University, Dpt. Naval Architecture and Ocean Engineering, Busan, Republic of Korea

Abstract

In this study, changes in fluid impact loads inside a tank were examined according to a two-row tank arrangement in an LNG-FPSO (Liquefied Natural Gas-Floating Production Storage Offloading) vessel. The motion RAO (Response Amplitude Operator) of the LNG-FPSO, coupled with the sloshing phenomenon inside the tank, was calculated by using HydroStar by Bureau Veritas. The motion simulation in the tank was conducted under filling ratios of 30%H, 60%H, and 80%H. The RAO in each condition was calculated according to the one-row and the two-row tank arrangement. The motion response spectrum using the calculated RAO and the JONSWAP (Joint North Sea Wave Analysis Project) spectrum were computed by implementing irregular motion according to each filling ratio and tank arrangement. The sloshing phenomenon inside the tank was implemented by using a 6-DOF (Degree Of Freedom) sloshing motion platform; impact pressure on the walls of the tank was measured with pressure sensors installed inside the tank. The sloshing experiment was conducted under the three filling ratios in the one-row and the two-row tank arrangement and impact loads were compared under each filling ratio according to the one-row and the two-row tank arrangement.

Keywords

sloshing phenomenon; LNG-FPSO (Liquefied Natural Gas-Floating Production Storage Offloading); CCS (Cargo Containment System); RAO (Response Amplitude Operator); model-based testing; 6-DOF SMP (Sloshing Motion Platform); impact load; two-row effect; coupling effect

Hrčak ID:

135874

URI

https://hrcak.srce.hr/135874

Publication date:

4.3.2015.

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