约旦次临界装置主结构坐落在细长的钢管支腿上,支腿在压力下具有失稳的可能性,为此需要对其进行屈曲分析。利用ANSYS提供的屈曲分析功能进行特征值屈曲分析,该方法为线性屈曲分析,由于装置的安全设防标准较低,所以该结果已能满足计算精度的要求。支腿的分析选用较精确的三维壳单元建立有限元模型,而没有采用管单元,并在支腿顶板的 The Jordan primary structure of the subcritical unit sits on a slender steel tube leg, which has the potential for instability under pressure and for which buckling analysis is required. The buckling analysis provided by ANSYS is used to perform eigenvalue buckling analysis. The method is linear buckling analysis. Because of the low safety fortification standard of the device, the result can meet the requirement of calculation accuracy. Outrigger analysis selects the more accurate three-dimensional shell element to establish the finite element model, but does not adopt the tube unit,