Assessment of internal pressure effect, causing additional bending of the pipeline
Article justifies accounting for internal pressure effect in the pipeline, causing additional bending of the pipeline. According to some scientists, there is an erroneously used concept of the equivalent longitudinal axial force (ELAF) Sx, which depends on working pressure, temperature stresses, and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Saint-Petersburg Mining University
2020-04-01
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| Series: | Записки Горного института |
| Subjects: | |
| Online Access: | https://pmi.spmi.ru/index.php/pmi/article/view/13436?setLocale=en_US |
| _version_ | 1797947179749343232 |
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| author | Ramil N. BAKTIZIN Rail M. ZARIPOV Gennadii E. KOROBKOV Radik B. MASALIMOV |
| author_facet | Ramil N. BAKTIZIN Rail M. ZARIPOV Gennadii E. KOROBKOV Radik B. MASALIMOV |
| author_sort | Ramil N. BAKTIZIN |
| collection | DOAJ |
| description | Article justifies accounting for internal pressure effect in the pipeline, causing additional bending of the pipeline. According to some scientists, there is an erroneously used concept of the equivalent longitudinal axial force (ELAF) Sx, which depends on working pressure, temperature stresses, and joint deformations of pipelines with various types of soils. However, authors of the article use ELAF Sx concept at construction of mathematical model of stress-strain state (SSS) for complex section of the trunk pipeline, and also reveal it when analyzing the results of calculating the durability and stability of the pipeline. Analysis of SSS for calculated section of the pipeline was carried out for two statements of the problem for different values of operation parameters. In the first statement, effect of internal pressure causing bending of the pipeline is taken into account, and in the second it is neglected. It is shown that due to effect of ELAF Sx at p0 = 9.0 MPa, Dt = 29 °C extreme value of bend increases by 54 %, extreme values of bending stresses from span bending moment increase by 74 %, and extreme value of bending stresses from support bending moment double with regard to corresponding SSS characteristics of the pipeline. In case of neglecting the internal pressure effect causing additional bending of the pipeline (second statement of the problem), error in calculating the extreme value of bend is 35 %, extreme value of bending stresses from span bending moments is 44 %, and extreme value of bending stresses from support bending moments is 95 %. |
| first_indexed | 2024-04-10T21:23:46Z |
| format | Article |
| id | doaj.art-3a152698d04346aa922a2142167c94fe |
| institution | Directory Open Access Journal |
| issn | 2411-3336 2541-9404 |
| language | English |
| last_indexed | 2024-04-10T21:23:46Z |
| publishDate | 2020-04-01 |
| publisher | Saint-Petersburg Mining University |
| record_format | Article |
| series | Записки Горного института |
| spelling | doaj.art-3a152698d04346aa922a2142167c94fe2023-01-20T02:04:54ZengSaint-Petersburg Mining UniversityЗаписки Горного института2411-33362541-94042020-04-0124216016010.31897/pmi.2020.2.16013436Assessment of internal pressure effect, causing additional bending of the pipelineRamil N. BAKTIZIN0Rail M. ZARIPOV1Gennadii E. KOROBKOV2Radik B. MASALIMOV3Ufa State Petroleum Technological UniversityUfa State Petroleum Technological UniversityUfa State Petroleum Technological UniversityUfa State Petroleum Technological UniversityArticle justifies accounting for internal pressure effect in the pipeline, causing additional bending of the pipeline. According to some scientists, there is an erroneously used concept of the equivalent longitudinal axial force (ELAF) Sx, which depends on working pressure, temperature stresses, and joint deformations of pipelines with various types of soils. However, authors of the article use ELAF Sx concept at construction of mathematical model of stress-strain state (SSS) for complex section of the trunk pipeline, and also reveal it when analyzing the results of calculating the durability and stability of the pipeline. Analysis of SSS for calculated section of the pipeline was carried out for two statements of the problem for different values of operation parameters. In the first statement, effect of internal pressure causing bending of the pipeline is taken into account, and in the second it is neglected. It is shown that due to effect of ELAF Sx at p0 = 9.0 MPa, Dt = 29 °C extreme value of bend increases by 54 %, extreme values of bending stresses from span bending moment increase by 74 %, and extreme value of bending stresses from support bending moment double with regard to corresponding SSS characteristics of the pipeline. In case of neglecting the internal pressure effect causing additional bending of the pipeline (second statement of the problem), error in calculating the extreme value of bend is 35 %, extreme value of bending stresses from span bending moments is 44 %, and extreme value of bending stresses from support bending moments is 95 %.https://pmi.spmi.ru/index.php/pmi/article/view/13436?setLocale=en_USoil pipelinepipelinesoilbendforcemomentsstressstrainpressure |
| spellingShingle | Ramil N. BAKTIZIN Rail M. ZARIPOV Gennadii E. KOROBKOV Radik B. MASALIMOV Assessment of internal pressure effect, causing additional bending of the pipeline Записки Горного института oil pipeline pipeline soil bend force moments stress strain pressure |
| title | Assessment of internal pressure effect, causing additional bending of the pipeline |
| title_full | Assessment of internal pressure effect, causing additional bending of the pipeline |
| title_fullStr | Assessment of internal pressure effect, causing additional bending of the pipeline |
| title_full_unstemmed | Assessment of internal pressure effect, causing additional bending of the pipeline |
| title_short | Assessment of internal pressure effect, causing additional bending of the pipeline |
| title_sort | assessment of internal pressure effect causing additional bending of the pipeline |
| topic | oil pipeline pipeline soil bend force moments stress strain pressure |
| url | https://pmi.spmi.ru/index.php/pmi/article/view/13436?setLocale=en_US |
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