The results showed that: similar to the wedge dented riser, ultimate strength reduced significantly as the maximum depth of the spherical dent increased;
结果表明：和楔形凹陷损伤立管一样，随着凹陷深度的加大，立管的极限强度明显减小；
The results showed that: similar to the wedge dented riser, ultimate strength reduced significantly as the maximum depth of the spherical dent increased;
结果表明：和楔形凹陷损伤立管一样，随着凹陷深度的加大，立管的极限强度明显减小；
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