《Table 3Main particulars of LNG-FPSO》

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《考虑晃荡耦合船舶运动的晃荡压力算法（英文）》

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A vessel with simultaneous sloshing in two partially filled prismatic tank is considered.This vessel geometry corresponds to a simplified LNG-FPSO model which has been considered in the experimental studies of Nam et al.（2009）on a 1/100 scaled model.The main particulars of the vessel and tanks are given in Tables 3 and 4.A schematic of the vessel with two tanks is shown in Fig.8.Both the tanks are prismatic in form with a conventional chamfer angle of 135°.The centroids of both the tanks are located 6.96 m above the keel.The aft tank is located 95.105 m aft of midship and the forward tank is located 57.66 m forward of midship.The chosen vessel and tanks configurations are practical and realistic.The other reason that prompted the present selection of LNG-FPSO with partial filling in two tanks is that validation studies on motions with slosh coupling has been performed by us in a previous study for this case based on the present algorithm（refer Saripilli and Sen 2017b）.In that study，comparison of motions（roll and heave）against the experimental and numerical results of Nam et al.（2009）and other numerical results of Gou et al.（2011）and Jiang et al.（2015）for two filling condition，a 20%–20%filling and a 30%–30%filling in the fore and aft tanks，have been presented and discussed.The fill level is defined in terms of% Htankwhere Htankis height of the tank.The roll natural frequency of the vessel（without partial filling）isωo=0.483 rad/s，i.e.ωoL=g=2.60.As the tanks are identical in breadth（Btank=46.92 m），the slosh natural frequency for both the tanks in first mode（ω1）for 20%filling is 0.52 rad/s and for 30%filling is0.61 rad/s.