埋藏式压力钢管受外压失稳屈曲分析的半解析有限元法

The semi-analytical finite element method of buckling analysis for penstock under external pressure

埋藏式压力钢管受外压失稳屈曲的分析 ,采用半解析有限元法 ,即周向采用离散柱壳有限条元法。该方法的柱壳有限条元弧长是可变的 ,从而模拟失稳屈曲波形变化的状态。理论分析及实验研究都告诉我们 ,该理论具有精度高、计算结果合理 ,有广泛的推广应用价值。

The semi-analytical finite element method,i.e.the discrete cylinder shell finite strip element method in the circumferential direction is adopted in the buckling analysis of penstock under external pressure,in which the length of the arc of the cylinder shell finite strip is variable in order to simulate the variation of the buckling wave shape.The theoretical analysis and the experimental research have be proved that this theory is of high accuracy,the computation result is credible and reliable,and it processes the extensive application value.