考虑初始缺陷的压力容器筒体外压屈曲分析

Bulking Analysis of Pressure Vessels with Initial Imperfections under External Pressure

以某压力容器筒体为例,采用ANSYS分析软件对其在外压载荷作用下的屈曲特性进行详细分析,首先采用特征值屈曲分析对屈曲载荷及屈曲形状进行预估;然后针对分析模型引入初始缺陷,进行非线性屈曲分析,进而对两种分析方法确定的屈曲载荷进行对比分析,后者确定的屈曲载荷更为精确。

A pressure vessel shell is analyzed with software ANSYS to find out the bulking characteristics under external pressure.First,the eigenvalue bulking analysis is used to predict the bulking load and shape.Then,the model with added initial imperfections undergoes nonlinear bulking analysis to determine the bulking load and shape.The comparison between the results of the eigenvalue bulking analysis and nonlinear bulking analysis indicates that the later one could determine bulking load more accurately.