45°焊接斜三通应力增大系数的分析计算
Stress intensification factor analysis and calculation for the welded 45°lateral tee
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- 引用格式:
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郭礼,闫东军,代长林,高建林,董安轲,王毅,吴振元.45°焊接斜三通应力增大系数的分析计算[J].天然气与石油,2021,39(1):56-60.doi:10.3969/j.issn.1006-5539.2021.01.009
GUO Li, YAN Dongjun , DAI Changlin, GAO Jianlin, DONG Anke, WANG Yi, WU Zhenyuan.Stress intensification factor analysis and calculation for the welded 45°lateral tee [J].Natural Gas and Oil,2021,39(1):56-60.doi:10.3969/j.issn.1006-5539.2021.01.009
- DOI:
- 10.3969/j.issn.1006-5539.2021.01.009
- 作者:
- 郭礼，闫东军，代长林，高建林，董安轲，王毅，吴振元
GUO Li, YAN Dongjun , DAI Changlin, GAO Jianlin, DONG Anke, WANG Yi, WU Zhenyuan
- 作者单位:
- 中国石油工程建设有限公司西南分公司
China Petroleum Engineering & Construction Corp. Southwest Company, Chengdu, Sichuan, 610041,China
- 关键词:
- 放空系统;焊接斜三通;应力增大系数;有限元
Vent system; Welded lateral tee; Stress intensification factor; Finite element
- 摘要:
- 应力增大系数是45°焊接斜三通在放空系统管道应力分析中的重要参数。为了使45°焊接斜三通应力增大系数的计算更加准确,利用有限元分析软件NozzlePRO对低压放空系统中常用的45°焊接斜三通的六种应力增大系数进行了计算,并将结果与ASME B31.3 Process Piping和ASME B31J Standard Test Method for Determining Stress Intensification Factors(i-factors) for Metallic Piping Components规范中90°未补强型焊制三通公式计算结果进行对比。结果表明:ASME B31J Standard Test Method for Determining Stress Intensification Factors(i-factors) for Metallic Piping Components中90°未补强型焊制三通支管及主管在平面内和平面外的应力增大系数计算公式对45°焊接斜三通仍具有适用性;45°焊接斜三通的支管及主管的扭转应力增大系数在三通处扭矩不能被忽略时,应利用有限元软件进行求解。该研究结果可为管道应力分析计算提供一些参考。
The stress intensification factor is a key parameter in the piping stress analysis of 45° lateral tee in the vent system. In order to make the calculation more accurate, six kinds of stress intensification factors of welded 45° lateral tee commonly used in low-pressure vent system were calculated by using finite element analysis software NozzlePRO. The results were compared with those calculated by formulas of 90°unreinforced fabricated tee in ASME B31.3 Process Piping and ASME B31J Standard Test Method for Determining Stress Intensification Factors (i-factors) for Metallic Piping Components. The results show that the stress intensification factor calculation formulas for branch pipe and main pipe in and out of the plane of the 90°unreinforced fabricated tee in ASME B31J are still applicable to the welded 45°lateral tee. When the torque at the tee cannot be ignored, the torsional stress intensification factor of the branch pipe and main pipe of the fabricated 45° lateral tee should be calculated using the finite element software. This research results can be used asareference for piping stress analysis.
