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首页> 外文会议>ASME(American Society of Mechanical Engineers)/JSME Pressure Vessels and Piping Conference: Fitness for Service, Life Extension, Remediation, Repair, and Erosion, Corrosion Issues for Pressure Vessels and Components; 20040725-20040729; San Diego,CA; US >ASSESSMENT OF A DAMAGED PIPING SYSTEM UTILIZING LASER SURFACE SCANNING AND FINITE ELEMENT ANALYSIS
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ASSESSMENT OF A DAMAGED PIPING SYSTEM UTILIZING LASER SURFACE SCANNING AND FINITE ELEMENT ANALYSIS

机译：利用激光表面扫描和有限元分析对损坏的管道系统进行评估

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摘要

The application of laser surface scanning technology in conjunction with finite element analysis to evaluate the fitness for service of a damaged section of piping is presented in this paper. The difference between the results obtained using a simplified dimensional model produced using hand measurements and the laser scan is also discussed. A section of NPS 18 (DN 450) diameter piping that carries vapors generated by a coke drum in an oil refinery delayed coking unit had been damaged in service from contact with a nearby structural steel member. The damaged area was deformed nearly 1.2 in. (30 mm) deep over an area measuring approximately 10 in. x 12 in. (250 mm x 300 mm) and included a pronounced crease along the line of contact with the steel. The piping was also slightly out of round outside of the area of gross distortion. Laser scanning was employed to obtain an accurate dimensional representation of the surface geometry and to develop a finite element analysis model. The decision to allow the piping system to continue to operate until the next scheduled outage was then based upon the operating stresses, maximum strain in the deformed area and fatigue life determined for the damaged section.
机译：本文介绍了激光表面扫描技术与有限元分析相结合的应用，以评估管道损坏部分的使用寿命。还讨论了使用手动测量产生的简化尺寸模型获得的结果与激光扫描之间的差异。直径为NPS 18（DN 450）的管道的一部分因在炼油厂延迟焦化装置中焦炭鼓产生的蒸气而与附近的结构钢构件接触，因此在使用中已损坏。损坏的区域在约10英寸x 12英寸（250毫米x 300毫米）的区域上变形了近1.2英寸（30毫米）深，并沿与钢的接触线出现了明显的折痕。在严重变形区域之外，管道也略微不圆。使用激光扫描来获得表面几何形状的精确尺寸表示并开发有限元分析模型。然后，根据操作应力，变形区域的最大应变以及为受损部分确定的疲劳寿命，决定允许管道系统继续运行直到下一次计划的停运。

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