基于ANSYS的压力容器开孔补强结构可靠性分析与优化设计

Reliable Analysis and Optimum Design for Opening Reinforcement Structure of Pressure Vessel Based on ANSYS

在压力容器上开孔,不仅削弱了材料的强度,而且会导致开孔部位局部应力集中,降低压力容器的承载能力,严重影响压力容器的安全性。国标中对压力容器开孔补强设计虽然有一系列规定,但对影响结构安全性诸因素的随机性考虑较少。采用ANSYS有限元软件可靠性分析及优化设计功能相结合的方法,对压力容器开孔补强结构进行可靠性分析并获得应力敏感因素,从而进行相应优化设计。结果表明这种设计方法切实可行。

If the pressure vessel was holed, it not only weakened the material strength of container, but also led to local stress con- centration in the hole site, so that the pressure vessel carrying capacity was reduced, which seriously affected the safety of the pressure vessel. Although there were a series of regulations on opening reinforcement structure design for pressure vessel in GB, but the influence of the safety factors＇ randomness was considered less. It analyzed and designed for pressure vessel with a method of combining reliable analysis and optimum design function of ANSYS, the reliability of opening reinforcement structure was analyzed, and stress sensitive factors was obtained, then the corresponding optimization was designed on stress sensitive factors. The result showed that this method was practical and feasible.