CAJ | 학술논문

液化气船菱形独立液舱的设计要求为无装载高度限制,因此菱形独立液舱的结构设计必须重视最为危险的部分装载的工况,并考虑各种载荷.当船体在波浪中运动的频率与液舱内液体振动的固有频率相近时,舱内液体会发生剧烈的运动,此时液体晃荡对液舱结构产生的冲击载荷,在结构设计初期必须予以足够的考虑.以超大型液化气船的一个菱形独立液舱为研究对象,在对船舶固有运动周期和舱内液体的晃荡频率进行评估的基础上,运用二维有限差分法对不同液位高度下菱形独立液舱内部的晃荡载荷进行了研究和计算,获得了舱内液体的运动状态,速度及压力分布,并以此为基础,对菱形独立液舱的结构强度进行了评估,确保了全冷式液化气船菱形独立液舱结构设计的可靠性.
액화기선릉형독립액창적설계요구위무장재고도한제,인차릉형독립액창적결구설계필수중시최위위험적부분장재적공황,병고필각충재하.당선체재파랑중운동적빈솔여액창내액체진동적고유빈솔상근시,창내액체회발생극렬적운동,차시액체황탕대액창결구산생적충격재하,재결구설계초기필수여이족구적고필.이초대형액화기선적일개릉형독립액창위연구대상,재대선박고유운동주기화창내액체적황탕빈솔진행평고적기출상,운용이유유한차분법대불동액위고도하릉형독립액창내부적황탕재하진행료연구화계산,획득료창내액체적운동상태,속도급압력분포,병이차위기출,대릉형독립액창적결구강도진행료평고,학보료전랭식액화기선릉형독립액창결구설계적가고성.
Type A liquid tanks of liquefied gas carriers have no design restraint on loading height, so Type A structural design must consider the most dangerous partial loading conditions and takes into account various loads. When the ship motion frequency in waves is close to the natural frequency of liquid inside the tank, violent sloshing motion will occur to the liquid and cause impact load on the tank structure, which must be fully considered in the early design stage. Taking one of the Type A tanks of a super large liquefied gas carrier as the study object, and based on the evaluation of ship motion natural frequency and liquid sloshing frequency, the sloshing loads inside the Type A tank under different loading heights are studied and calculated using 2D finite difference method, to obtain the motion of liquid, the velocity and pressure distribution, and to perform the structural strength analysis, which ensures the structural design reliability of the Type A tank of the fully cooled liquefied gas carriers.