VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface Crack
Vortex-induced vibration (VIV) is one of the most common dynamic mechanisms that cause damage to marine risers. Hamilton’s variational principle is used to establish a vortex-induced vibration (VIV) model of a flexible riser in which the wake oscillator model is used to simulate cross-flow (CF) and...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/2968325 |
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| author | Jun Liu Zhigang Du Xiaoqiang Guo Liming Dai Liang Huang Xiao Li |
| author_facet | Jun Liu Zhigang Du Xiaoqiang Guo Liming Dai Liang Huang Xiao Li |
| author_sort | Jun Liu |
| collection | DOAJ |
| description | Vortex-induced vibration (VIV) is one of the most common dynamic mechanisms that cause damage to marine risers. Hamilton’s variational principle is used to establish a vortex-induced vibration (VIV) model of a flexible riser in which the wake oscillator model is used to simulate cross-flow (CF) and inline flow (IL) vortex-induced forces and their coupling, taking into account the effect of the top tension and internal flow in the riser. The VIV model is solved by combining the Newmark-β and Runge–Kutta methods and verified with experimental data from the literature. Combining Option 1 and Option 2 failure assessment diagrams (FADs) in the BS7910 standard, a fracture failure assessment model for a marine riser with circumferential semielliptical outside surface cracks is established. Using the VIV model and FAD failure assessment chart, the effects of riser length, inside/outside flows, and top tension on the VIV response and safety assessment of marine risers with outside surface cracks are investigated. It is shown that increasing the top tension can inhibit the lateral displacement amplitude and bending stress in a riser, but excessive top tension can increase the axial stress in the riser, which counteracts the decrease in the bending stress, so that the effect of top tension on crack safety is not significant. The increasing outside flow velocity significantly increases the lateral vibration amplitude and bending stress in the riser and reduces the crack safety. When other parameters remain unchanged, increasing riser length has no significant effect on the vibration amplitude of the lower part of the riser. |
| format | Article |
| id | doaj-art-dcb802cb55aa4c938f64feeffd7f565d |
| institution | DOAJ |
| issn | 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-dcb802cb55aa4c938f64feeffd7f565d2025-08-20T03:23:56ZengWileyShock and Vibration1875-92032021-01-01202110.1155/2021/2968325VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface CrackJun Liu0Zhigang Du1Xiaoqiang Guo2Liming Dai3Liang Huang4Xiao Li5School of Mechanical EngineeringSchool of Mechatronic EngineeringSchool of Mechanical EngineeringIndustrial Systems EngineeringZhanjiang BranchSchool of Mechatronic EngineeringVortex-induced vibration (VIV) is one of the most common dynamic mechanisms that cause damage to marine risers. Hamilton’s variational principle is used to establish a vortex-induced vibration (VIV) model of a flexible riser in which the wake oscillator model is used to simulate cross-flow (CF) and inline flow (IL) vortex-induced forces and their coupling, taking into account the effect of the top tension and internal flow in the riser. The VIV model is solved by combining the Newmark-β and Runge–Kutta methods and verified with experimental data from the literature. Combining Option 1 and Option 2 failure assessment diagrams (FADs) in the BS7910 standard, a fracture failure assessment model for a marine riser with circumferential semielliptical outside surface cracks is established. Using the VIV model and FAD failure assessment chart, the effects of riser length, inside/outside flows, and top tension on the VIV response and safety assessment of marine risers with outside surface cracks are investigated. It is shown that increasing the top tension can inhibit the lateral displacement amplitude and bending stress in a riser, but excessive top tension can increase the axial stress in the riser, which counteracts the decrease in the bending stress, so that the effect of top tension on crack safety is not significant. The increasing outside flow velocity significantly increases the lateral vibration amplitude and bending stress in the riser and reduces the crack safety. When other parameters remain unchanged, increasing riser length has no significant effect on the vibration amplitude of the lower part of the riser.http://dx.doi.org/10.1155/2021/2968325 |
| spellingShingle | Jun Liu Zhigang Du Xiaoqiang Guo Liming Dai Liang Huang Xiao Li VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface Crack Shock and Vibration |
| title | VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface Crack |
| title_full | VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface Crack |
| title_fullStr | VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface Crack |
| title_full_unstemmed | VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface Crack |
| title_short | VIV Fracture Investigation into 3D Marine Riser with a Circumferential Outside Surface Crack |
| title_sort | viv fracture investigation into 3d marine riser with a circumferential outside surface crack |
| url | http://dx.doi.org/10.1155/2021/2968325 |
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