针对半可燃药筒在竖向放置过程中可能出现的受力变形问题,建立了力学模型.采用三维非线性有限元理论对药筒的接触变形进行了计算,得到了药筒的应变、应力分布规律和半可燃药筒结构强度的数值预测.结果表明,在竖放无载荷的情况下,筒体在变直径区域产生应力集中,与金属底座的交界处应力最大.半可燃药筒的筒体变形量较大,金属底座各处的变形量几乎为零.筒体与金属底座上的最大应力远小于材料的许用应力,因此筒体结构和金属底座是安全的.%For the mechanical deformation of semi-combustible cartridge under upright storage, a mechanics model was established. The contact deformation of semi-combustible cartridge was calculated by 3-dimensional nonlinear finite element method theory. The distribution of stress and strain and numerical prediction of structural strength of semi-combustible cartridge were obtained. The results showed that the stress concentration occurred at the alterative area of diameter of case, when semi-combustible cartridge was upright and unloaded. The stress of intersection between the case and metal pedestal reached maximum value. The case deformation of semi-combustible cartridge was larger,but the deformation everywhere of metal pedestal closed to zero. The maximum stresses of the case and metal pedestal were far less than allowable stress of material,so the whole semi-combustible cartridge remained secure.
展开▼
