基于结构疲劳动态可靠性分析的船舶结构概率损伤容限设计  

PROBABILISTIC DAMAGE TOLERANCE DESIGN FOR SHIP STRUCTURAL COMPONENTS BASED ON DYNAMIC RELIABILITY ANALYSIS

作　　者：钱仍勣 陈洪平[1] 何东明[1] 

机构地区：[1]上海交通大学

出　　处：《中国造船》1997年第2期46-52,共7页Shipbuilding of China

摘　　要：本文根据结构可靠性理论，提出了一种基于结构疲劳动态可靠性分析的损伤容限分析方法，给出结构疲劳裂纹随机扩展过程中疲劳寿命分布和结构疲劳可靠性的表达式。在给定与疲劳寿命有关的各参数条件下求得动态可靠性曲线，从而在结构设计中根据可靠性要求确定或选择设计参数。A method of structure damage tolerance analysis based on the structural fatigue reliability analysis is presented in the present paper. The stochastic distribution of the fatigue life in the process of the fatigue cracks growing in the structure and the relevant representation of structure reliability is given. Under the condition of the statistical parameters related to fatigue life of the structure, such as the initial crack length, the material toughness used, and the load acting on the structure being given, the dynamic reliability curves are obtained. Thus, the damage tolerance and the other design parameters can be determined according to the request of reliability.

关 键 词：船舶 结构设计 损伤容限分析 动态可靠性 

分 类 号：U662.2[交通运输工程—船舶及航道工程]