CAJ | 학술논문

近年来,集装箱船的大型化趋势日益明显.MARIC积极研发符合市场需求的超大型集装箱船,在2013年成功获得了18 000 TEU超大型集装箱船的实船设计任务.并以此船为实例阐述了集装箱船超大型化后给结构设计带来的挑战.介绍了一种利用全船有限元直接加载规范载荷校核合成应力的计算方法,通过加集中力来拟合船体梁所受到的弯矩、扭矩包络线.与薄壁梁理论相比,该方法的合成应力计算结果更精确,有利于优化设计.在超大型集装箱船的舱段有限元与全船有限元分析中,规范的垂向波浪弯矩值往往比实际值小,这时需要采用直接载荷预报的垂向波浪弯矩值进行分析.超大型集装箱船的航速较高,显著的艏部外飘,并且一阶固有频率比常规船型低,容易引起颤振(whipping)和弹振(springing).应用水弹性分析,探讨了颤振和弹振对于超大型集装箱船结构的极限强度和疲劳强度的影响.
근년래,집장상선적대형화추세일익명현.MARIC적겁연발부합시장수구적초대형집장상선,재2013년성공획득료18 000 TEU초대형집장상선적실선설계임무.병이차선위실례천술료집장상선초대형화후급결구설계대래적도전.개소료일충이용전선유한원직접가재규범재하교핵합성응력적계산방법,통과가집중력래의합선체량소수도적만구、뉴구포락선.여박벽량이론상비,해방법적합성응력계산결과경정학,유리우우화설계.재초대형집장상선적창단유한원여전선유한원분석중,규범적수향파랑만구치왕왕비실제치소,저시수요채용직접재하예보적수향파랑만구치진행분석.초대형집장상선적항속교고,현저적수부외표,병차일계고유빈솔비상규선형저,용역인기전진(whipping)화탄진(springing).응용수탄성분석,탐토료전진화탄진대우초대형집장상선결구적겁한강도화피로강도적영향.
In recent years, the trend of container ship size maximization has become increasingly evident. MARIC has been actively developing ultra large container ships in line with market demand, and successfully attained a real ship design task of 18000TEU ultra large container ship in 2013. Taking this ship as the example, this paper elaborates the challenges to structural design due to ultra large container ships. A new method for calculating hull girder combined nominal stress is introduced, which is by applying nodal forces to the global finite element model to obtain envelopes of hull girder bending moments and torsion moments. Compared with beam theory, this method has higher combined stress calculation result accuracy, which is good for design optimization. During cargo hold and global FEM analyses, the rule values of vertical wave bending moment are underestimated for ULCS, therefore direct calculation of the vertical wave bending moment should be adopted for FEM analysis. ULCS features high speed, large bow flare, and lower natural frequency of first hull girder mode than conventional ships, thus is more vulnerable to whipping and spring phenomenon. Based on hydro-elastic analysis of structure response, this paper indicates the impact of whipping and springing on ULCS structure ultimate strength and fatigue strength.