Numerical modelling techniques for the assessment of dented pipelines

用于评估凹陷管道的数值建模技术

• 批准号: 537243-2018
• 负责人: Dhar, Ashutosh
• 金额: $ 1.82万
• 依托单位: Memorial University of Newfoundland
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=649204
• 关键词: Numerical; modelling; techniques; assessment; dented

Pipelines are extensively used across Canada and worldwide as a safe, reliable and environmentally friendly way of transporting oil and gas. The pipelines traversing different ground conditions are sometime subjected to minor mechanical damages from external interference. A dent is a type of mechanical damage resulting in a plastic deformation of pipe wall. The performance of the pipes subjected to the wall dents are not well-understood. As a result, current pipeline design codes recommend an expensive solution of removing the dented portion for pipes having a dent depth of 2% to 6% of the pipe diameter. To develop a cost-effective solution for the dented pipes, in the current research, numerical modelling techniques will be developed for the assessment of the pipeline subjected to wall dents. Finite element modelling techniques will be developed for simulating the mechanisms involved in dent formation and for assessing the performance of dented pipes under service loads. The research findings would be useful for updating the pipe design codes with better understanding the behavior of the dented pipes. The industry collaborator will utilize the results to provide pipeline integrity assessment services to the pipeline industry for safe and economic transportation of oil and gas. ****

管道作为一种安全、可靠和环保的石油和天然气运输方式在加拿大和世界各地广泛使用。穿越不同地面条件的管道有时会因外部干扰而受到轻微的机械损坏。凹痕是一种导致管壁塑性变形的机械损伤。受到壁凹痕的管道的性能还没有得到很好的理解。因此，当前的管道设计规范推荐了一种昂贵的解决方案，即对于具有管道直径的2%至6%的凹陷深度的管道去除凹陷部分。为了开发一个具有成本效益的解决方案，凹陷的管道，在目前的研究中，数值模拟技术将开发的管道壁凹陷的评估。将开发有限元建模技术，以模拟凹痕形成的机制，并评估凹痕管道在使用荷载下的性能。研究结果将有助于更新管道设计规范，更好地了解凹陷管道的行为。行业合作者将利用这些结果为管道行业提供管道完整性评估服务，以实现石油和天然气的安全和经济运输。****