摘要
采用有限元法计算了具有不同角度周向斜接管圆柱形容器在内压作用下的弹性应力和变形,对周向斜接管内压圆柱容器的弹性应力分布、应力集中范围、变形特征、应力集中系数等问题做了初步探讨。计算结果表明,周向斜接管内压圆柱容器在接管与容器的相贯区存在明显的应力集中,相贯区在筒体纵向截面沿径向收缩,而在筒体横向截面沿径向膨胀,最大主应力出现在筒体的纵向截面,相贯区外表面在筒体的横向截面处于三向压缩状态;与正交接管内压圆柱容器相比,周向斜接管圆柱容器在内压作用下的最大主应力略小,二者基本满足Sβ=S0(cosβ)0.5;应力集中系数随着角度β的增加而降低。
The tensile stress and deformation of cylindrical pressure vessel with hillside nozzles of various angles are calculated by using finite element method. Then a preliminary discussion is made about the rule of elastic stress distribution, stress concentration range, deformation characteristics and stress concentration factor of the intersection. The calculation results show that the distinct stress concentration occurs in the hillside intersection, and the intersection shrinks in the longitudinal section of the cylinder, while bulge appears in the transverse section. The maximum principle stress of hillside intersection occurs in the longitudinal section of cylinder, and the outer surface of intersection in the transverse section of cylinder is in three-dimensional compressed status. The maximum principle stress of the hillside intersection is a little smaller than that of the radial intersection. The relationship between them is in good agreement with equation Sβ =So (cos β )0.5. The stress concentration factor for cylindrical pressure vessel with hillside nozzles declines swith the increment of the angle β.
出处
《石油机械》
北大核心
2005年第11期11-14,共4页
China Petroleum Machinery
