CAJ | 학술논문

疲劳破坏是船舶结构的主要破坏形式之一。为了保证船舶结构有足够的疲劳强度，各国船级社、船厂等均建立了船舶结构疲劳强度校核规范作为船舶疲劳评估的指导性文件，尽管这些规范均是建立在S-N曲线方法基础上的，但由于S-N曲线方法存在自身无法克服的缺陷（如忽略材料的初始缺陷等），对同一节点进行计算得到的疲劳寿命大相径庭。该文作者在基于裂纹扩展理论的基础之上，给出了一套详细的船体结构疲劳评估方法，并应用此方法对大型船舶结构典型节点的疲劳寿命进行评估，以期能为完善船舶结构疲劳寿命的评估提供参考。
피로파배시선박결구적주요파배형식지일。위료보증선박결구유족구적피로강도，각국선급사、선엄등균건립료선박결구피로강도교핵규범작위선박피로평고적지도성문건，진관저사규범균시건립재S-N곡선방법기출상적，단유우S-N곡선방법존재자신무법극복적결함（여홀략재료적초시결함등），대동일절점진행계산득도적피로수명대상경정。해문작자재기우렬문확전이론적기출지상，급출료일투상세적선체결구피로평고방법，병응용차방법대대형선박결구전형절점적피로수명진행평고，이기능위완선선박결구피로수명적평고제공삼고。
Fatigue damage is one of main forms of ship structures destroyed. Every classification society and shipyard take fatigue assessment rules of ship structures as an instruction to assure fatigue strength of ship structures. Although these rules are based on the method of S-N curve, different fatigue lives of the same node are obtained with the help of different rules, because the disadvantages of S-N curve could not be avoided, such as neglect of initial objection of material. In this paper, fatigue strength assessment methods of ship structures are studied based on the facture propagation theory, and a detailed fatigue assessment method of ship structures is proposed, which is supposed to reference to predict fatigue life and preparation to perfect fatigue strength assessment of ship structures.