外压作用下深海腐蚀缺陷管道的屈曲失稳机理

龚顺风,徐勤贵,周家伟,王喜鹏,刘承斌

Buckle and collapse mechanisms of deep-sea corrosion defect pipes under external pressure

Shun-feng GONG,Qin-gui XU,Jia-wei ZHOU,Xi-peng WANG,Cheng-bin LIU

表 3 试件失稳压力模拟结果与试验值的比较

Tab.3 Comparison of collapse pressure between simulation results and experimental values for test specimens

试件编号 pCOR/MPa $ {{\hat p}_{_{{\rm{COR}}}}}/{\rm{MPa}}$ e/% TD1 22.41 22.30 −0.49 TD2 21.79 21.59 −0.92 TD3 19.88 20.33 2.26 TD4 18.27 18.67 2.18 TD5 16.80 17.01 1.25 TD6 21.55 21.27 1.30 TD7 16.70 17.19 2.93 TD8 16.21 16.33 0.74 TD9 20.12 19.93 −0.94 TD10 17.19 17.79 3.49 TD11 16.88 16.90 0.12