含腐蚀缺陷的顶张式立管局部屈曲特性
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摘要
采用有限元软件ABAQUS建立顶张式立管局部模型,对全局腐蚀和局部腐蚀参数进行敏感性分析和相关性分析。计算结果表明:全局腐蚀和局部腐蚀的压溃因数对腐蚀深度、长度的敏感性较强,对腐蚀宽度的敏感性较弱,当腐蚀宽度大于一定值时,压溃因数不再发生明显变化;压溃因数与腐蚀深度、长度、宽度参数的相关性依次减小,腐蚀深度、长度对压溃因数的影响远大于腐蚀宽度对其的影响。
The partial model of TTR is established by nonlinear finite element analysis software ABAQUS,the sensitivity analysis and correlation analysis are made on the whole and local corrosion parameters,respectively,and the impact of corrosion defects on the TTR buckling characteristics is studied.The results show that the sensitivity of crushing factor of the whole and local corrosion to the corrosion depth and length is stronger while that to the corrosion width is weaker.When the corrosion width reaches a certain level,the change of the crushing factor is not obvious.The correlations of the crushing factor with the corrosion depth,length and width weaken orderly.The impact of corrosion depth and length on the crushing factor is far greater than that of corrosion width.
The partial model of TTR is established by nonlinear finite element analysis software ABAQUS,the sensitivity analysis and correlation analysis are made on the whole and local corrosion parameters,respectively,and the impact of corrosion defects on the TTR buckling characteristics is studied.The results show that the sensitivity of crushing factor of the whole and local corrosion to the corrosion depth and length is stronger while that to the corrosion width is weaker.When the corrosion width reaches a certain level,the change of the crushing factor is not obvious.The correlations of the crushing factor with the corrosion depth,length and width weaken orderly.The impact of corrosion depth and length on the crushing factor is far greater than that of corrosion width.
引文
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[2]杨颖.腐蚀管道在复杂荷载作用下的数值仿真研究[D].大连:大连理工大学,2010.
[3]IFLEFEL I B,MOFFAT D G,MISTRY J.The interaction of pressure and bending on a dented pipe[J].International Journal of Pressure Vessels and Piping,2005(10):761-769.
[4]HAUCH S R,BAI Y.Bending moment capacity of groove corroded pipes[C]//Proceeding of the Tenth International Offshore and Polar Engineering Conference,Seattle,USA,2000.
[5]ALVES J L,ROEHL D.Numerical evaluation of load capacity of corroded pipes[C]//International Conference on Pipeline Engineering and Construction,2003.
[6]CHOI J B,GOO B K,KIM J C,et al.Development of limit load solutions for corroded gas pipeline[J].International Journal of Pressure Vessels and Piping,2003,80(02):121-128.
[7]American National Standards Institute(ANSI)/American Society of Mechanical Engineers 9(ASME).Manual for determining the remaining strength of corroded pipelines[S].ASME B31G,1984.
[8]余建星,卞雪航,余杨,等.深水海底管道全尺寸压溃试验及数值模拟[J].天津大学学报,2012(02):154-159.
[9]陈宏远,吉玲康,谢文江,等.受初始几何缺陷影响的管线管非线性屈曲分析[J].焊管,2009(09):22-26,30.
[10]孙逸敏.利用SPSS软件分析变量间的相关性[J].新疆教育学院学报,2007(02):120123.