The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform
Yoshiharu Matsumi - One of the best experts on this subject based on the ideXlab platform.
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a fundamental study on construction scheme for rubble foundation of deep water breakwater from hopper Barges
22nd International Conference on Coastal Engineering, 1991Co-Authors: Yoshiharu MatsumiAbstract:This study aims to establish the effective construction scheme of the rubble mounds which are constructed by discharging a large amount of rubble from hopper Barges. The numerical simulation technique is developed to estimate the spatial geometry of individual rubble mound discharged from a hopper barge. The effective distance between the discharge sites of the barge which makes the uneven property of the mound surface a minimum is discussed in connection with the change in the spatial geometry of the discharged rubble, the water depth and the direction of barge allocation.
Xin Xu - One of the best experts on this subject based on the ideXlab platform.
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hydrodynamic performance study of two side by side Barges
Ships and Offshore Structures, 2014Co-Authors: Xin Xu, Jianmin Yang, Xin Li, Liangyu XuAbstract:Recently, hydrodynamic interaction between two vessels in a side-by-side configuration has become a research focus. Because of the interaction of multiple bodies, the fluid movement and responses of the vessels are complex. First, the hydrodynamic performances of two identical Barges in close proximity in a side-by-side configuration are numerically investigated with a wave elevation in between the Barges. Second, corresponding experiments are carried out to validate the numerical results, and comparison of the experimental and calculation results shows that the numerical calculation accurately predicts the resonance period despite a difference in the peak values. Both fixed Barges and Barges undergoing constrained motions are also compared with free-floating Barges to illustrate the influence of motion on the wave elevation and resonance phenomena. Sensitivity analyses of the gap width, barge length, barge breadth, and draft are performed, revealing that the resonant wavelength increases with increasing ...
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wave drift forces on three Barges arranged side by side in floatover installation
ASME 2013 32nd International Conference on Ocean Offshore and Arctic Engineering, 2013Co-Authors: Xin Xu, Jianmin Yang, Xin Li, Haining LuAbstract:Floatover is a new method for installing integrated topside of a spar platform. It has several obvious advantages such as less time and cost compared with derrick lifting. In general, the floatover installation consists of three procedures: firstly a single barge is used for long-distance transportation of the topside in order to get good stability; secondly two Barges take place of the single barge for floatover installation near the operating site; finally the topside is transferred from the two Barges to the spar hull and the installation is completed. Between the first and second procedures, the case occurs that the single transportation barge is sided left and right by two floatover Barges in the second procedure with close proximity. This case is concerned by many designers and operators for the security problem brought by possible large relative motions and forces of the three Barges in side by side configuration.The hydrodynamics of side-by-side Barges are much more complex than that of a single barge in waves. In numerical simulation, it is a challenge to consider all effects including the hydrodynamic interactions, the shielding effects, the viscous effects and the wave resonance effect which has been observed in the gaps between the Barges and has a significant impact on wave drift forces. In this paper, motion responses and wave drift forces were calculated in frequency domain for both the multi-body system and the single body. Far-field, middle-field and near-field method were all carried out to calculate wave drift forces. Numerical analysis was executed using potential flow code WAMIT. Corresponding model tests were also performed in the Deepwater Offshore Basin in Shanghai Jiao Tong University. Comparison between numerical and experimental results shows that numerical results agree well with the experiment and that middle-field method has better convergence than near-field method. The comparison between the multi-body system and single body shows that the hydrodynamic interactions (including wave shielding effect and Helmholtz resonance of water in the gaps) are remarkable and motion responses in the multi-body system are larger than single barge at some frequencies.Copyright © 2013 by ASME
Haining Lu - One of the best experts on this subject based on the ideXlab platform.
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wave drift forces on three Barges arranged side by side in floatover installation
ASME 2013 32nd International Conference on Ocean Offshore and Arctic Engineering, 2013Co-Authors: Xin Xu, Jianmin Yang, Xin Li, Haining LuAbstract:Floatover is a new method for installing integrated topside of a spar platform. It has several obvious advantages such as less time and cost compared with derrick lifting. In general, the floatover installation consists of three procedures: firstly a single barge is used for long-distance transportation of the topside in order to get good stability; secondly two Barges take place of the single barge for floatover installation near the operating site; finally the topside is transferred from the two Barges to the spar hull and the installation is completed. Between the first and second procedures, the case occurs that the single transportation barge is sided left and right by two floatover Barges in the second procedure with close proximity. This case is concerned by many designers and operators for the security problem brought by possible large relative motions and forces of the three Barges in side by side configuration.The hydrodynamics of side-by-side Barges are much more complex than that of a single barge in waves. In numerical simulation, it is a challenge to consider all effects including the hydrodynamic interactions, the shielding effects, the viscous effects and the wave resonance effect which has been observed in the gaps between the Barges and has a significant impact on wave drift forces. In this paper, motion responses and wave drift forces were calculated in frequency domain for both the multi-body system and the single body. Far-field, middle-field and near-field method were all carried out to calculate wave drift forces. Numerical analysis was executed using potential flow code WAMIT. Corresponding model tests were also performed in the Deepwater Offshore Basin in Shanghai Jiao Tong University. Comparison between numerical and experimental results shows that numerical results agree well with the experiment and that middle-field method has better convergence than near-field method. The comparison between the multi-body system and single body shows that the hydrodynamic interactions (including wave shielding effect and Helmholtz resonance of water in the gaps) are remarkable and motion responses in the multi-body system are larger than single barge at some frequencies.Copyright © 2013 by ASME
Xin Li - One of the best experts on this subject based on the ideXlab platform.
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hydrodynamic performance study of two side by side Barges
Ships and Offshore Structures, 2014Co-Authors: Xin Xu, Jianmin Yang, Xin Li, Liangyu XuAbstract:Recently, hydrodynamic interaction between two vessels in a side-by-side configuration has become a research focus. Because of the interaction of multiple bodies, the fluid movement and responses of the vessels are complex. First, the hydrodynamic performances of two identical Barges in close proximity in a side-by-side configuration are numerically investigated with a wave elevation in between the Barges. Second, corresponding experiments are carried out to validate the numerical results, and comparison of the experimental and calculation results shows that the numerical calculation accurately predicts the resonance period despite a difference in the peak values. Both fixed Barges and Barges undergoing constrained motions are also compared with free-floating Barges to illustrate the influence of motion on the wave elevation and resonance phenomena. Sensitivity analyses of the gap width, barge length, barge breadth, and draft are performed, revealing that the resonant wavelength increases with increasing ...
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wave drift forces on three Barges arranged side by side in floatover installation
ASME 2013 32nd International Conference on Ocean Offshore and Arctic Engineering, 2013Co-Authors: Xin Xu, Jianmin Yang, Xin Li, Haining LuAbstract:Floatover is a new method for installing integrated topside of a spar platform. It has several obvious advantages such as less time and cost compared with derrick lifting. In general, the floatover installation consists of three procedures: firstly a single barge is used for long-distance transportation of the topside in order to get good stability; secondly two Barges take place of the single barge for floatover installation near the operating site; finally the topside is transferred from the two Barges to the spar hull and the installation is completed. Between the first and second procedures, the case occurs that the single transportation barge is sided left and right by two floatover Barges in the second procedure with close proximity. This case is concerned by many designers and operators for the security problem brought by possible large relative motions and forces of the three Barges in side by side configuration.The hydrodynamics of side-by-side Barges are much more complex than that of a single barge in waves. In numerical simulation, it is a challenge to consider all effects including the hydrodynamic interactions, the shielding effects, the viscous effects and the wave resonance effect which has been observed in the gaps between the Barges and has a significant impact on wave drift forces. In this paper, motion responses and wave drift forces were calculated in frequency domain for both the multi-body system and the single body. Far-field, middle-field and near-field method were all carried out to calculate wave drift forces. Numerical analysis was executed using potential flow code WAMIT. Corresponding model tests were also performed in the Deepwater Offshore Basin in Shanghai Jiao Tong University. Comparison between numerical and experimental results shows that numerical results agree well with the experiment and that middle-field method has better convergence than near-field method. The comparison between the multi-body system and single body shows that the hydrodynamic interactions (including wave shielding effect and Helmholtz resonance of water in the gaps) are remarkable and motion responses in the multi-body system are larger than single barge at some frequencies.Copyright © 2013 by ASME
Jianmin Yang - One of the best experts on this subject based on the ideXlab platform.
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hydrodynamic performance study of two side by side Barges
Ships and Offshore Structures, 2014Co-Authors: Xin Xu, Jianmin Yang, Xin Li, Liangyu XuAbstract:Recently, hydrodynamic interaction between two vessels in a side-by-side configuration has become a research focus. Because of the interaction of multiple bodies, the fluid movement and responses of the vessels are complex. First, the hydrodynamic performances of two identical Barges in close proximity in a side-by-side configuration are numerically investigated with a wave elevation in between the Barges. Second, corresponding experiments are carried out to validate the numerical results, and comparison of the experimental and calculation results shows that the numerical calculation accurately predicts the resonance period despite a difference in the peak values. Both fixed Barges and Barges undergoing constrained motions are also compared with free-floating Barges to illustrate the influence of motion on the wave elevation and resonance phenomena. Sensitivity analyses of the gap width, barge length, barge breadth, and draft are performed, revealing that the resonant wavelength increases with increasing ...
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wave drift forces on three Barges arranged side by side in floatover installation
ASME 2013 32nd International Conference on Ocean Offshore and Arctic Engineering, 2013Co-Authors: Xin Xu, Jianmin Yang, Xin Li, Haining LuAbstract:Floatover is a new method for installing integrated topside of a spar platform. It has several obvious advantages such as less time and cost compared with derrick lifting. In general, the floatover installation consists of three procedures: firstly a single barge is used for long-distance transportation of the topside in order to get good stability; secondly two Barges take place of the single barge for floatover installation near the operating site; finally the topside is transferred from the two Barges to the spar hull and the installation is completed. Between the first and second procedures, the case occurs that the single transportation barge is sided left and right by two floatover Barges in the second procedure with close proximity. This case is concerned by many designers and operators for the security problem brought by possible large relative motions and forces of the three Barges in side by side configuration.The hydrodynamics of side-by-side Barges are much more complex than that of a single barge in waves. In numerical simulation, it is a challenge to consider all effects including the hydrodynamic interactions, the shielding effects, the viscous effects and the wave resonance effect which has been observed in the gaps between the Barges and has a significant impact on wave drift forces. In this paper, motion responses and wave drift forces were calculated in frequency domain for both the multi-body system and the single body. Far-field, middle-field and near-field method were all carried out to calculate wave drift forces. Numerical analysis was executed using potential flow code WAMIT. Corresponding model tests were also performed in the Deepwater Offshore Basin in Shanghai Jiao Tong University. Comparison between numerical and experimental results shows that numerical results agree well with the experiment and that middle-field method has better convergence than near-field method. The comparison between the multi-body system and single body shows that the hydrodynamic interactions (including wave shielding effect and Helmholtz resonance of water in the gaps) are remarkable and motion responses in the multi-body system are larger than single barge at some frequencies.Copyright © 2013 by ASME
