CAJ | 학술논문

针对开大长矩形口的甲板结构，在开口内缘加设围缘扁钢，可以降低角隅处的应力集中。采用参数化分析方法，基于结构有限元数值计算结果，研究不同甲板厚度、开口尺寸和角隅半径时，扁钢长、宽、厚尺寸参数对应力集中的影响，并分析其原因。研究结果表明，随着扁钢尺寸的增大，开口处应力集中系数为先减小后增大，合理地设计扁钢加强方式才能有效降低应力集中。通过参数化计算，提出开口处围缘扁钢加强方式优化设计思想，给出最佳扁钢宽度值、厚度的设计公式及设计图谱，可以为甲板开口加强设计提供参考。
침대개대장구형구적갑판결구，재개구내연가설위연편강，가이강저각우처적응력집중。채용삼수화분석방법，기우결구유한원수치계산결과，연구불동갑판후도、개구척촌화각우반경시，편강장、관、후척촌삼수대응력집중적영향，병분석기원인。연구결과표명，수착편강척촌적증대，개구처응력집중계수위선감소후증대，합리지설계편강가강방식재능유효강저응력집중。통과삼수화계산，제출개구처위연편강가강방식우화설계사상，급출최가편강관도치、후도적설계공식급설계도보，가이위갑판개구가강설계제공삼고。
Decks with large rectangle openings often have stress concentration problems at corner regions, and such a problem can be alleviated through planting ring plates along the inside edges. In this paper,a parametric study based on the structural finite element method is implemented to investigate the strengthen-ing effects of ring plates with different sizes, namely plate thickness, width, and length,on deck opening corners with different thickness, opening sizes,and corner radius. It is seen that the Stress Concentration Factor (SCF) decreases first and then increases with the growth of the ring plate size, and only ring plates with reasonable scantling can alleviate the stress concentration effectively. An optimum design of ring plates is presented accordingly. Both the formula and design diagrams are proposed to calculate the opti-mum dimensions of ring plates, which serves as a good reference for future design on reducing the stress concentration for opening corners.