Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones
Buried pipelines are the main means of long distance transportation of natural gas. These pipelines are in high risk crossing liquefaction areas due to large deformations and stresses that may exist in pipe induced by the buoyancy load. In this study, a systematic analytical and numerical analysis w...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2018-09-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1996-1073/11/9/2334 |
| _version_ | 1798041304136941568 |
|---|---|
| author | Mengying Xia Hong Zhang |
| author_facet | Mengying Xia Hong Zhang |
| author_sort | Mengying Xia |
| collection | DOAJ |
| description | Buried pipelines are the main means of long distance transportation of natural gas. These pipelines are in high risk crossing liquefaction areas due to large deformations and stresses that may exist in pipe induced by the buoyancy load. In this study, a systematic analytical and numerical analysis were performed to investigate the mechanical behavior of a buried gas pipeline subjected to buoyancy in liquefaction areas. Soil constraints on pipe were considered accurately in the proposed models through soil spring assumptions. Effects of axial forces on pipe’s bending deformation were also considered via the governing equations for beam under bending and tension. Deformation compatibility condition was utilized to derive the axial forces in pipe. The accuracy of the proposed analytical model was validated by comparing its results with those derived by an established rigorous finite element model. In addition, parametric analysis was finally performed using the analytical model to study the influences of pipe diameter, pipe wall thickness, soil spring stiffness and width of liquefaction zone on pipe’s mechanical responses. This study can be referenced in the strength analysis and performance based safety evaluation of buried gas pipelines crossing liquefaction areas. |
| first_indexed | 2024-04-11T22:19:41Z |
| format | Article |
| id | doaj.art-f779c9d7fe7b4da588b44e19cc3ff229 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T22:19:41Z |
| publishDate | 2018-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f779c9d7fe7b4da588b44e19cc3ff2292022-12-22T04:00:15ZengMDPI AGEnergies1996-10732018-09-01119233410.3390/en11092334en11092334Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction ZonesMengying Xia0Hong Zhang1College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, ChinaCollege of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, ChinaBuried pipelines are the main means of long distance transportation of natural gas. These pipelines are in high risk crossing liquefaction areas due to large deformations and stresses that may exist in pipe induced by the buoyancy load. In this study, a systematic analytical and numerical analysis were performed to investigate the mechanical behavior of a buried gas pipeline subjected to buoyancy in liquefaction areas. Soil constraints on pipe were considered accurately in the proposed models through soil spring assumptions. Effects of axial forces on pipe’s bending deformation were also considered via the governing equations for beam under bending and tension. Deformation compatibility condition was utilized to derive the axial forces in pipe. The accuracy of the proposed analytical model was validated by comparing its results with those derived by an established rigorous finite element model. In addition, parametric analysis was finally performed using the analytical model to study the influences of pipe diameter, pipe wall thickness, soil spring stiffness and width of liquefaction zone on pipe’s mechanical responses. This study can be referenced in the strength analysis and performance based safety evaluation of buried gas pipelines crossing liquefaction areas.http://www.mdpi.com/1996-1073/11/9/2334gas pipelinestressbuoyancy loadliquefaction areaanalytical methodfinite element method |
| spellingShingle | Mengying Xia Hong Zhang Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones Energies gas pipeline stress buoyancy load liquefaction area analytical method finite element method |
| title | Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones |
| title_full | Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones |
| title_fullStr | Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones |
| title_full_unstemmed | Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones |
| title_short | Stress and Deformation Analysis of Buried Gas Pipelines Subjected to Buoyancy in Liquefaction Zones |
| title_sort | stress and deformation analysis of buried gas pipelines subjected to buoyancy in liquefaction zones |
| topic | gas pipeline stress buoyancy load liquefaction area analytical method finite element method |
| url | http://www.mdpi.com/1996-1073/11/9/2334 |
| work_keys_str_mv | AT mengyingxia stressanddeformationanalysisofburiedgaspipelinessubjectedtobuoyancyinliquefactionzones AT hongzhang stressanddeformationanalysisofburiedgaspipelinessubjectedtobuoyancyinliquefactionzones |