The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Johan Blaauwendraad - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear Simulation of Jackup Platform Models
Spe Drilling & Completion, 1993Co-Authors: W.w. Massie, J.g. Wolters, Johan BlaauwendraadAbstract:The paper summarises the laboratory studies and associated computer simulation of three principal jackup platform models tested in a wave tank. The primary objective of this work is to investigate the influence of hydrodynamic and load/deflection nonlinearities on such rigs. The computations were carried out in the time domain using a nonlinear dynamic, multiple degree of freedom simulation which includes various hydrodynamic interaction options. Comparison of the computed results with the measured data shows that such simulations are reliable. Further results demonstrate that hydrodynamic interaction must include relative rather than absolute velocities. The load/deflection effect is essential, damping and stiffness at the Deck-Leg connection can within certain limits be 'traded off' and a realistic model should be callibrated using the recorded responses and also the recorded internal forces. Hydrodynamic parameter studies such as the influences of linearisation, free surface treatment, different wave theories, hydrodynamic force cancellation etc. are also presented.
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Nonlinear simulation of jackup platform models
Offshore Technology Conference, 1990Co-Authors: W.w. Massie, J.g. Wolters, Johan BlaauwendraadAbstract:This paper summarizes laboratory studies and associated computer simulations for three jackup models. Comparison of computed results with measured data shows that such simulations are reliable. Further results demonstrate that hydrodynamic interaction must include relative velocities, the P-δ effect is essential, and damping and stiffness at the Deck/Leg connection can be «traded off.» Parameter studies, such as the influences of linearization, free-surface treatment, different wave theories, and hydrodynamic force cancellation, also are presented
W.w. Massie - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear Simulation of Jackup Platform Models
Spe Drilling & Completion, 1993Co-Authors: W.w. Massie, J.g. Wolters, Johan BlaauwendraadAbstract:The paper summarises the laboratory studies and associated computer simulation of three principal jackup platform models tested in a wave tank. The primary objective of this work is to investigate the influence of hydrodynamic and load/deflection nonlinearities on such rigs. The computations were carried out in the time domain using a nonlinear dynamic, multiple degree of freedom simulation which includes various hydrodynamic interaction options. Comparison of the computed results with the measured data shows that such simulations are reliable. Further results demonstrate that hydrodynamic interaction must include relative rather than absolute velocities. The load/deflection effect is essential, damping and stiffness at the Deck-Leg connection can within certain limits be 'traded off' and a realistic model should be callibrated using the recorded responses and also the recorded internal forces. Hydrodynamic parameter studies such as the influences of linearisation, free surface treatment, different wave theories, hydrodynamic force cancellation etc. are also presented.
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Nonlinear simulation of jackup platform models
Offshore Technology Conference, 1990Co-Authors: W.w. Massie, J.g. Wolters, Johan BlaauwendraadAbstract:This paper summarizes laboratory studies and associated computer simulations for three jackup models. Comparison of computed results with measured data shows that such simulations are reliable. Further results demonstrate that hydrodynamic interaction must include relative velocities, the P-δ effect is essential, and damping and stiffness at the Deck/Leg connection can be «traded off.» Parameter studies, such as the influences of linearization, free-surface treatment, different wave theories, and hydrodynamic force cancellation, also are presented
J.g. Wolters - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear Simulation of Jackup Platform Models
Spe Drilling & Completion, 1993Co-Authors: W.w. Massie, J.g. Wolters, Johan BlaauwendraadAbstract:The paper summarises the laboratory studies and associated computer simulation of three principal jackup platform models tested in a wave tank. The primary objective of this work is to investigate the influence of hydrodynamic and load/deflection nonlinearities on such rigs. The computations were carried out in the time domain using a nonlinear dynamic, multiple degree of freedom simulation which includes various hydrodynamic interaction options. Comparison of the computed results with the measured data shows that such simulations are reliable. Further results demonstrate that hydrodynamic interaction must include relative rather than absolute velocities. The load/deflection effect is essential, damping and stiffness at the Deck-Leg connection can within certain limits be 'traded off' and a realistic model should be callibrated using the recorded responses and also the recorded internal forces. Hydrodynamic parameter studies such as the influences of linearisation, free surface treatment, different wave theories, hydrodynamic force cancellation etc. are also presented.
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Nonlinear simulation of jackup platform models
Offshore Technology Conference, 1990Co-Authors: W.w. Massie, J.g. Wolters, Johan BlaauwendraadAbstract:This paper summarizes laboratory studies and associated computer simulations for three jackup models. Comparison of computed results with measured data shows that such simulations are reliable. Further results demonstrate that hydrodynamic interaction must include relative velocities, the P-δ effect is essential, and damping and stiffness at the Deck/Leg connection can be «traded off.» Parameter studies, such as the influences of linearization, free-surface treatment, different wave theories, and hydrodynamic force cancellation, also are presented
Yosua Riskiyanto Palentek - One of the best experts on this subject based on the ideXlab platform.
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study on buckling strength at Deck Leg of fixed offshore platform
International Journal of Engineering, 2016Co-Authors: Muhammad Zubair Muis Alie, Arga Aditya, Yosua Riskiyanto PalentekAbstract:A Deck of fixed offshore platform is location where the all activities are performed, i.e. Deck must be supported by Leg with adequately strength under vertical or horizontal loading. The present study is focused on the buckling strength taking the Deck Leg of fixed jacket offshore platform into account. The axial compressive load is applied to the Deck Leg of the structure. Because dimension front view and side view of the Deck structure is completely different, so that the analysis is conducted by two stages. To investigate the critical buckling load and critical buckling stress including its deformation, the plane-frame (2D) analysis is considered. The Non-linear Finite Element Method so-called Structural Analysis Program (SAP) is adopted for the investigation of the structural behaviors. The critical buckling load and stress ratio obtained by Finite Element Analysis (FEA) is compared with the simple formula. As a result, it can be concluded that the stress ratio of the combination between axial compression and bending is less than 1,0 which indicates that the structure is safe.
Muhammad Zubair Muis Alie - One of the best experts on this subject based on the ideXlab platform.
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study on buckling strength at Deck Leg of fixed offshore platform
International Journal of Engineering, 2016Co-Authors: Muhammad Zubair Muis Alie, Arga Aditya, Yosua Riskiyanto PalentekAbstract:A Deck of fixed offshore platform is location where the all activities are performed, i.e. Deck must be supported by Leg with adequately strength under vertical or horizontal loading. The present study is focused on the buckling strength taking the Deck Leg of fixed jacket offshore platform into account. The axial compressive load is applied to the Deck Leg of the structure. Because dimension front view and side view of the Deck structure is completely different, so that the analysis is conducted by two stages. To investigate the critical buckling load and critical buckling stress including its deformation, the plane-frame (2D) analysis is considered. The Non-linear Finite Element Method so-called Structural Analysis Program (SAP) is adopted for the investigation of the structural behaviors. The critical buckling load and stress ratio obtained by Finite Element Analysis (FEA) is compared with the simple formula. As a result, it can be concluded that the stress ratio of the combination between axial compression and bending is less than 1,0 which indicates that the structure is safe.
