CAJ | 학술논문

基于三维时域Rankine源法计算不同航速下三体船的总纵垂向弯矩、垂向剪力和总纵扭矩以及连接桥上的横向弯矩、垂向剪力和横向扭矩。基于北大西洋海况的长期预报结果，研究片体纵向位置以及航速效应对三体船波浪载荷沿船长、随浪向的分布规律以及对载荷大小的影响，得出基于波浪载荷的片体优化分析和航速建议，可以为三体船的载荷直接计算和结构强度分析提供参考。研究发现，片体位置对纵向扭矩以及连接桥弯扭载荷的分布和大小影响很大，片体位于距船尾约35%~40% L比较有利；船舶在中高航速(0.25≤Fn <0.4)下的波浪载荷比较小。此外，改善片体重量分布有利于减小连接桥载荷。
기우삼유시역Rankine원법계산불동항속하삼체선적총종수향만구、수향전력화총종뉴구이급련접교상적횡향만구、수향전력화횡향뉴구。기우북대서양해황적장기예보결과，연구편체종향위치이급항속효응대삼체선파랑재하연선장、수랑향적분포규률이급대재하대소적영향，득출기우파랑재하적편체우화분석화항속건의，가이위삼체선적재하직접계산화결구강도분석제공삼고。연구발현，편체위치대종향뉴구이급련접교만뉴재하적분포화대소영향흔대，편체위우거선미약35%~40% L비교유리；선박재중고항속(0.25≤Fn <0.4)하적파랑재하비교소。차외，개선편체중량분포유리우감소련접교재하。
In this paper, 3-D Rankine panel method was applied to calculate the response functions of the wave load on typical sections along the mainhull and on the crossdeck. Then long term prediction results based on statistical wave information of North Atlantic were used to demonstrate their distribution characteristics along ship length as well as over wave directions. Sensitivity analysis of wave loads with different sidehull ’ s layouts and different ship speeds was investigated respectively. Sidehull ’ s layouts have significant impacts on longitudinal torsion moment and crossdeck’s transverse load. Desirable position of sidehull is about 35% ~40%of the whole ship length from the aft. The voyage speed within (0. 25≤Fn <0. 4) is good for wave load on trimaran. Reducing the distance between center of mass and buoyancy of sidehull is good for crossdeck′s structural performance. This paper provides some information for the direct structural analysis of trimaran.