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. ****

管道在加拿大和全球范围内广泛用于运输石油和天然气的安全，可靠和环保的方式。横穿不同地面条件的管道有时会受到外部干扰的少量机械损害。凹痕是一种机械损伤，导致管壁的塑性变形。受到墙凹痕的管道的性能并没有得到很好的理解。结果，当前的管道设计代码建议一种昂贵的解决方案，以去除凹痕深度为管道直径2％至6％的管道的凹痕部分。为了为凹陷管道开发一种具有成本效益的解决方案，在当前的研究中，将开发数值建模技术，以评估受壁凹口的管道。将开发有限元建模技术，以模拟凹痕形成所涉及的机制以及评估服务负载下的凹陷管道的性能。研究发现对于更好地了解凹痕管道的行为而更新管道设计代码非常有用。该行业合作者将利用结果为管道行业提供管道完整性评估服务，以安全和经济运输石油和天然气。 ****