考虑中性轴偏转的碰撞损伤船体梁剩余极限强度分析  

Residual Ultimate Strength Analysis of Damaged Ship Hull after Collision with Consideration of Neutral Axis’s Shifting and Rotation

作　　者：刘昆[1] 严力宇 张延昌[1] 王自力[1] LIU Kun;YAN Liyu;ZHANG Yanchang;WANG Zili(School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Jiangsu Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《船舶工程》2020年第5期35-40,共6页Ship Engineering

基　　金：国家自然科学基金(51609110,51779110)。

摘　　要：安全性一直是船舶设计建造及运营维护的首要目标。船舶碰撞作为船舶最常见事故之一,会显著削弱船体结构强度,甚至导致结构整体失效。因此,碰撞后的剩余极限强度计算对结构安全性尤为重要。文章基于《散货船和油船共同结构规范》,采用Visual Basic 6.0软件编写计算程序,实现了对极限/剩余承载力的计算,并对加载过程中的中性轴偏移规律作了简要分析。考虑到中性轴在加载过程中的偏转,通过改进计算分析程序,再次计算船体梁的剩余极限强度,并且讨论了中性轴偏转对船体梁剩余极限强度的影响,为船舶设计评估提供参考。Safety is the primary goal of ship design,construction and operation and maintenance.As one of the most frequent disasters,collisions always weaken the structural strength of ship hulls,and even lead to ships’entire collapse.Therefore,it is important to perform residual strength analyses of damaged ship hulls after a collision.Based on the"Harmonized Common Structural Rules for Bulk Carriers and Oil Tankers",ultimate/residual strength is calculated with the self-developed code written by Visual Basic 6.0 and the tendency of neutral axis’s shifting is briefly analyzed with bending loads applied gradually.With the consideration of both shifting and rotation of the neutral axis,the code is improved and then the residual strength of the ship hull is recalculated.The incidence of the rotation of the neutral axis on the ship hull’s residual strength is discussed,which provides a reference for ship design evaluation.

关 键 词：损伤船体 极限强度 剩余强度 逐步破坏法 中性轴偏转 

分 类 号：U661.43[交通运输工程—船舶及航道工程]