哈尔滨工程大学学报2011，Vol.32Issue(2)：153-158,6.DOI:10.3969/j.issn.1006-7043.2011.02.004
船舶结构低周疲劳强度分析方法
A low-cycle-fatigue assessment method of ship structures
摘要
Abstract
A model to analyze the low-cycle-fatigue strength of ship structures was presented. It combined dissipation energy of continuum mechanics with plastic mechanics, and is based on continuum damage mechanics and thermodynamics theories. The applicability of the model has been verified by fatigue test results of high strength steel 402, the Manson-Coffin equation, the universal slopes method, and a method of extrapolating a high-cycle-fatigue S-N curve in a low cycle life region. The convenience of assessing the low-cycle-fatigue strength and damage of local ship structures precisely was proven. It was also implied by the models that the low-cycle-fatigue strength was related to the effective mean amplitude and steel fatigue test constants K and m. The damage limit of steel which is commonly used in shipbuilding was shown to be 0.3.关键词
船舶工程/低周疲劳/塑性应变/高周疲劳/S-N曲线/损伤Key words
ship engineering/ low-cycle-fatigue/ plastic strain/ high-cycle-fatigue/ S-N curve/ damage分类
交通工程引用本文复制引用
田雨,纪卓尚..船舶结构低周疲劳强度分析方法[J].哈尔滨工程大学学报,2011,32(2):153-158,6.基金项目
辽宁省博士启动基金资助项目(20061065). （20061065）
