摘要
探讨了建立潜艇疲劳载荷概率模型的方法,引入了正态分布和两参数威布尔分布两种概率模型。两参数威布尔分布较适合于用来描述潜艇下潜深度分布的概率特征。可根据潜艇的设计参数、任务及航行区域等因素来选取最可能的分布形式获得潜深分布密度函数。潜艇疲劳热点部位的应力(应变)幅值分布,可由应力(应变)和潜深的关系通过相应的变换得到。
The process of establishing a probability model of fatigue load of submarines or submersibles is discussed. The normal distridution and twoparameter Weibull distribution are introduced to establish the probability model. The twoparameter Weibull distribution is more suitable for describing the probability feature of the diving depth distribution of submarines or submersibles. The diving depth distribution density function of an actual submarine or submersible can be determined by considering all the factors of the design parameters, task and action area. The hot spot stress(strain) amplitude distribution of submarines or submersibles can be derived through corresponding transform based on the relationship between stress(strain) and its diving depth.
出处
《海洋工程》
CSCD
北大核心
2003年第3期18-23,共6页
The Ocean Engineering
基金
中国博士后基金赞助项目
关键词
潜艇
潜器
疲劳载荷
概率模型
submarine
submersible
fatigue load
probability model
