ABSTRACT

Based on the working condition of the LNG bunkering Tanker, the hydrodynamic interaction between the LNG bunkering tanker and the LNG receiving tanker was analyzed. Based on the theory of three-dimensional potential flow, the multi-body hydrodynamics software AQWA was applied to calculate the wave excitation force and amplitude response operator of two tankers considering the hydrodynamic interaction. Meanwhile, the influence of different side spacing on the hydrodynamic performance was analyzed. The hydrodynamic interaction of the side mooring system is not negligible, and the hydrodynamic interaction between the ships mainly produces obvious effects in the middle and low frequency band of waves. The research results can provide reference for the design and research of side by side mooring system.

INTRODUCTION

With the rapid development of global trade and shipping industry, ship emissions have become one of the important sources of air pollution in route areas and port cities. The International Maritime Organization (IMO) set a global sulphur limit on January 1, 2020, and set up an inland and coastal ship emission control zone. To meet increasingly stringent emissions requirements, the global shipping industry is actively seeking greener alternatives. As a ship fuel, LNG has become the most practical and feasible for ship carbon emission reduction and cost reduction due to its green and economic advantages. The domestic and foreign LNG ship refueling industry emerged at the historic moment. Due to the ultra-low temperature characteristics of LNG, tail-off unloading is not suitable for LNG refueling operation, so it can only be carried out by side-unloading. The LNG bunkering tanker and the receiving tanker form a multi-floating body unit system. Due to the interaction between the units of the system and the shielding effect of wind, wave and current, the multi-floating body unit system is worth further study.

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