摘要
LNG储罐受到惯性力载荷的作用,其结构强度需要进行评估,但由于其几何形状及边界条件复杂,一直缺乏相应的评估体系。提出LNG储罐疲劳分析的一般方法,以某LNG储罐为例,进行了疲劳损伤的计算及校核分析,对单元选择、模型简化、约束定义、载荷施加等给出了指导性意见,并探讨了储罐的布置方向对疲劳损伤计算的影响,研究结果表明,储罐沿船舶纵向布置时对结构设计的要求较高,应尽量选择横向布置方式。
The LNG tank bears the inertial force load. lts structural strength needs to be evaluated But there is lacking of a corresponding evaluation system because of its complex geometry and boundary conditions. The general method of fatigue analysis of LNG tank is proposed Taking an LNG tank as an example, the fatigue damage calculation and the checking analysis are conducted The guidance for unit selection, model simplification, constraint definition and load application is given. The effect on fatigue damage calculation of the tank caused by arrangement direction is studied. The results show that the higher requirements on structure design of LNG tank are needed when it is arranged longitudinally on the ship; the transverse arrangement is adopted as far as possible.
出处
《船舶工程》
北大核心
2015年第5期19-23,共5页
Ship Engineering
基金
高技术船舶科研项目:中速双燃料发动机工程化开发(工信部联装[2013]412号)
关键词
LNG储罐
疲劳分析
损伤校核
结构设计
布置方向
LNG tank
fatigue analysis
damage check
structural design
arrangement direction
