{"title":"Quantitative study on thermal-mechanical failure of overhead steel pipelines under natural gas jet fire","authors":"","doi":"10.1016/j.ijpvp.2024.105350","DOIUrl":null,"url":null,"abstract":"<div><div>Parallel overhead pipelines are particularly adept at traversing intricate terrains. Nonetheless, the emergence of jet flames due to initial pipeline incidents can precipitate failures in adjacent pipelines, thereby intensifying the overall situation. Therefore, it is essential to examine the thermal-mechanical responses of pipelines exposed to natural gas jet fires. Building on combustion mechanisms, a transient thermal-mechanical coupling model has been developed for full-scale steel pipelines in the context of natural gas jet fires. The thermal-mechanical response characteristics of these pipelines are subsequently analyzed, and the impacts of four distinct variables on pipe wall temperature and normalized stress are quantitatively evaluated. Ultimately, a safety evaluation methodology for pipelines subjected to jet flames is proposed, which integrates critical thermal failure criteria with PSO-LSTM algorithm. The results demonstrate that the proposed thermal-mechanical coupling model effectively simulates the thermal effects of jet fires on pipelines, achieving a model error of less than 10 %. Notably, the flow velocity of crude oil has the most pronounced effect on the thermal failure of the pipeline. The established thermal-mechanical failure criterion, in conjunction with the PSO-LSTM hybrid model (average error of 5.57 %), enables the rapid prediction of critical failure conditions across a wide range of operational scenarios.</div></div>","PeriodicalId":54946,"journal":{"name":"International Journal of Pressure Vessels and Piping","volume":null,"pages":null},"PeriodicalIF":3.0000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Pressure Vessels and Piping","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S030801612400228X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Parallel overhead pipelines are particularly adept at traversing intricate terrains. Nonetheless, the emergence of jet flames due to initial pipeline incidents can precipitate failures in adjacent pipelines, thereby intensifying the overall situation. Therefore, it is essential to examine the thermal-mechanical responses of pipelines exposed to natural gas jet fires. Building on combustion mechanisms, a transient thermal-mechanical coupling model has been developed for full-scale steel pipelines in the context of natural gas jet fires. The thermal-mechanical response characteristics of these pipelines are subsequently analyzed, and the impacts of four distinct variables on pipe wall temperature and normalized stress are quantitatively evaluated. Ultimately, a safety evaluation methodology for pipelines subjected to jet flames is proposed, which integrates critical thermal failure criteria with PSO-LSTM algorithm. The results demonstrate that the proposed thermal-mechanical coupling model effectively simulates the thermal effects of jet fires on pipelines, achieving a model error of less than 10 %. Notably, the flow velocity of crude oil has the most pronounced effect on the thermal failure of the pipeline. The established thermal-mechanical failure criterion, in conjunction with the PSO-LSTM hybrid model (average error of 5.57 %), enables the rapid prediction of critical failure conditions across a wide range of operational scenarios.
期刊介绍:
Pressure vessel engineering technology is of importance in many branches of industry. This journal publishes the latest research results and related information on all its associated aspects, with particular emphasis on the structural integrity assessment, maintenance and life extension of pressurised process engineering plants.
The anticipated coverage of the International Journal of Pressure Vessels and Piping ranges from simple mass-produced pressure vessels to large custom-built vessels and tanks. Pressure vessels technology is a developing field, and contributions on the following topics will therefore be welcome:
• Pressure vessel engineering
• Structural integrity assessment
• Design methods
• Codes and standards
• Fabrication and welding
• Materials properties requirements
• Inspection and quality management
• Maintenance and life extension
• Ageing and environmental effects
• Life management
Of particular importance are papers covering aspects of significant practical application which could lead to major improvements in economy, reliability and useful life. While most accepted papers represent the results of original applied research, critical reviews of topical interest by world-leading experts will also appear from time to time.
International Journal of Pressure Vessels and Piping is indispensable reading for engineering professionals involved in the energy, petrochemicals, process plant, transport, aerospace and related industries; for manufacturers of pressure vessels and ancillary equipment; and for academics pursuing research in these areas.