高钢级厚壁直缝埋弧焊管静水压试验时环向应力的有限元模拟

Finite Element Simulation of Hoop Stress of High Grade Thick Wall Longitudinal Submerged Arc Welded Pipe during Hydrostatic Pressure Test

摘要: 采用有限元模拟了壁厚32 mm的高钢级(X70钢)直缝埋弧焊管在静水压试验时的环向应力, 同时根据API SPC 5L标准、DNV-OS-F101标准和机械工程师手册计算环向应力, 并与有限元模拟的环向应力进行了比较。结果表明: 对于同一规格X70钢管静水压试验时的环向应力, 其公式计算结果和有限元模拟结果较为吻合, 且与机械工程师手册中厚壁管的计算结果最接近, 内外表面环向应力误差分别为0.1%和1.1%。

Abstract: The hoop stress of high grade (X70) longitudinal submerged arc welded pipe with wall thickness of 32 mm during hydrostatic pressure test was simulated by finite element method and was computed using API SPC 5L, DNV-OS-F101 and mechanical engineer manual, and the computation results were compared with the simulation ones. The results show that the simulation results was correspondent with computation results for the same X70 steel pipe during hydrostatic pressure test, especially with the results of thick wall pipe computed using mechanical engineer manual, and the error of hoop stress on internal and external surface was 0.1% and 1.1%, respectively.