压力容器大开孔补强结构强度的有限元分析

运用压力面积法和有限单元法计算分析了一模型容器筒体上受内压的大开孔补强结构 ,用极限分析法求出其极限载荷和设计载荷 ,并用分析设计法进行了验证。通过比较和分析可知 ,压力面积法由于没有考虑弯曲应力的限制 ,用于大开孔补强设计有时是不可靠的 ,在工程实践中压力容器大开孔补强结构应有较大的安全系数 ,有限单元法对于大开孔补强设计是合理和安全的

Finite Element Analysis of the Reinforcement Structure Strength of Pressure Vessel with Large Opening

The reinforcement structure strength of a model pressure cylinder with large opening subject to internal pressure is calculated using two large opening reinforcement methods including pressure area method (PAM) and finite element method (FEM).Its limit load and design load are analyzed by limit analysis method, its strength subject to internal design load pressure is checked using analysis design.By comparing and analyzing the model pressure cylinder with a nozzle subject to internal pressure by using these two methods respectively, sometimes, PAM is unreliable because of neglecting bending stress.The reinforcement structure strength of pressure vessel with large opening needs a conservative safe coefficient on engineering practice.Meanwhile, FEM are available and reliable for pressure vessel with large opening.