船舶腐蚀断裂力学的一种数值计算方法  

A numerical simulation approach for stress-assisted problem in ship structures

作　　者：唐志波[1] 谢永和[1] 楼林燕[1] 

机构地区：[1]浙江海洋学院船舶与建筑工程学院,浙江舟山316004

出　　处：《船舶力学》2007年第2期231-236,共6页Journal of Ship Mechanics

基　　金：浙江省教育厅基金(20061137);浙江省重大科技攻关项目基金(2004C11034);浙江海洋学院归国博士科研启动基金(20051217)

摘　　要：基于船体表面微裂缝在应力和海水腐蚀耦合作用下的扩展机理,根据Charles-Hillig模型用数值方法模拟了裂缝的动态扩展过程,并用front-tracking图形技术开发了有限元网格剖分软件,从根本上解决了以往该模型无法进行数值模拟的难题。文中侧重于对腐蚀断裂问题进行一般性的基础研究,探索裂缝扩展时的形态以及速度与外荷载之间的关系,数值计算表明,计算结果和实验得出的曲线在形态上比较吻合。Based on the mechanisms for stress-assisted corrosion problem of ship structures, the numerical simulation was carried out,with application of Charles-Hillig Model,to study the behavior of crack propagation,where the advanced front-tracking method was employed for finite element mesh construction and re-construction.Instead of explaining some specific chemical corrosive case,the general investigation of this paper is focussed on the relationship between crack tip velocity and the load,also the behavior of crack evolution, the simulation results meet the experiments very well.

关 键 词：船舶结构 应力腐蚀耦合 裂缝动态扩展 数值方法 

分 类 号：U661.5[交通运输工程—船舶及航道工程]