CAJ | 학술논문

文章给出线性波激振动和砰击颤振引起的大型油船结构疲劳贡献度的计算方法。基于三维线性水弹性理论可计算得到包括刚体和2节点的振动模态下的垂向弯矩的传递函数，采用谱分析法对某30万吨油船进行结构疲劳强度计算，分析波激振动对船体结构疲劳损伤影响；基于二维非线性波浪载荷程序（含砰击颤振的波浪载荷），采用时域方法对该油船进行船体梁弯矩计算，分析砰击颤振对船体梁弯矩及疲劳载荷的影响；结果表明对于该类大型油船波激振动和砰击颤振对船体的结构疲劳损伤的影响不可忽略。
문장급출선성파격진동화팽격전진인기적대형유선결구피로공헌도적계산방법。기우삼유선성수탄성이론가계산득도포괄강체화2절점적진동모태하적수향만구적전체함수，채용보분석법대모30만둔유선진행결구피로강도계산，분석파격진동대선체결구피로손상영향；기우이유비선성파랑재하정서（함팽격전진적파랑재하），채용시역방법대해유선진행선체량만구계산，분석팽격전진대선체량만구급피로재하적영향；결과표명대우해류대형유선파격진동화팽격전진대선체적결구피로손상적영향불가홀략。
This paper presents the calculation method of the springing and whipping induced structural fatigue contribution to very large oil tankers. The vertical bending moment RAOs including rigid body motions and two-node vibration are calculated by the linear three-dimensional hydroelasticity theory. The structural fatigue strength of a 300 000 ton oil tanker is calculated by the spectral method for the analysis of the springing effect on the fatigue damage of hull structures. The vertical bending moment in time domain is calculated by the two-dimension nonlinear wave load program with consideration of the whipping induced wave loads, resulting in the evaluation of the whipping effect on the hull girder bending moment and on the fatigue load. The results show that the wave induced springing and whipping have a strong impact on the structural fatigue damage of the very large oil tankers.