船舶结构不同应力点的应力概率模型

Probabilistic stress model of different stress points in ship structure

为揭示船舶运行品质与其结构应力点之间的内在关系,对船舶结构中关键应力点在安全受力情形下所受应力构建主应力大小概率模型和主应力方向概率模型,并讨论和确定这两个概率模型的相关参数.研究表明,不同位置的应力点在安全受力时主应力大小概率模型和主应力方向概率模型主要服从高斯分布或韦布尔分布,但所服从的参数不尽相同.该方法从应力点受力安全的角度为船舶结构安全和运行品质的评测提供一定理论依据.

To reveal intrinsic relationship between operation quality and structure stress points of ships,two probabilistic models of the principal stress magnitude and the principal stress direction are constructed regarding the stress of critical points with secure force in the ship structure. Further,the corresponding parameters of the two probabilistic models are discussed and determined. It is concluded that the two probabilistic models regarding the different stress points with secure force follow Gaussian distribution or Weibull distribution,but are subject to different parameters. This method provides theoretical foundation for evaluation on ship structure safety and operation quality from the perspective of the stress points with secure force.