综合考虑规范对立管强度的要求，防止发生压溃和屈曲扩展的要求及限制立管发生漂浮的要求三个条件，确定了满足条件的最小壁厚。
Considering the requirements of riser strength, system collapse, propagated buckling and limitation of floating, the smallest thickness that meets the requirements is determined.
结果显示立管顶部预张力、管外流速分布、立管外径对疲劳损伤的影响非常明显，而管内流体密度和立管壁厚因其变化范围有限，对疲劳损伤的影响没有上述三个参数显著。
The effects of various factors, such as top pre-tension, inner fluid density, current velocity profile, outer diameter and riser wall thickness on VIV-induced fatigue damage in the …
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