两种纵骨端部连接形式的疲劳强度分析

Fatigue Analysis on Two Types of Longitudinal Stiffener End Connections

介绍纵骨端部连接形式的应力集中系数替代设计方法,并采用该方法对船舶结构设计中常用的两种纵骨端部连接形式(简称Type A&Type B)以及H-CSR规范纵骨端部连接形式应力集中系数表格中的Type 2&Type 4进行研究,对比不同纵骨端部连接形式对应力集中系数和纵骨疲劳寿命的影响,分析对腹板加强筋屈服强度的影响,证明使用Type 2&Type 4替代Type A&Type B形式计算纵骨疲劳强度是可行的。

The method for alternative design of stress concentration factor of longitudinal stiffener end connection was discussed,and four types of longitudinal stiffener end connections including type A and type B which usually used in ship structural design and type 2 and type 4 which provided by H-CSR rules were studied by this method.The affection on the stress concentration factor and fatigue life of longitudinals was analyzed,as well as the yielding of web stiffener.It is feasible to use type 2 and type 4 instead of type A and type B to calculate fatigue life of the longitudinal.