The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform
Chunwei Zhang - One of the best experts on this subject based on the ideXlab platform.
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A swing control module for large off-shore hook structures: Design and validation using a wireless inclination measurement system
International Journal of Innovative Computing Information and Control, 2010Co-Authors: Yan Yu, Jin-ping Ou, Luyu Li, Chunwei ZhangAbstract:In order to reduce the vibration under intense wind and wave load to\nmeet the demand on sea work and further increase the working efficiency\nfor Lager Scale Heavy Derrick Lay Barge, an innovative Tuned Mass Damper\n(TMD) based swing control module for the hook is designed and validated.\nThe,vibration model of Lanjiang Hook is developed and a TMD control\nmodule for Lanjiang hook is provided. Based on the vibration model, the\ncontrol module and actual application, a new gear-pendulum-type TMD\ncontrol system including pendulum and inverted pendulum is presented so\nas to realize the control of the structure that has a long period,\nespecially when there is a strict space requirement for the size of the\ncontrol device to be small such as the application of control device on\nLanjiang hook. The analysis of the proposed control system's parameters\nshows the suitable ones for the whole control system work effectively.\nFinally, the validation experiment for the presented control system\nusing a wireless inclination measurement system is conducted.\nExperimental results show that, the wireless inclination measurement\nsystem can be used more conveniently in swing monitoring for the hook\ncontrol of Lager Scale Heavy Derrick Lay Barge. Furthermore, the control\neffect of the developed TMD system is at least 33 percent which also\nvalidates the effectiveness and feasibility of the proposed control\nsystem for improving the swing movement of large hook model.
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Wireless inclinometer acquisition system for reducing swing movement control module experiment of hook model
SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL MECHANICAL AND AEROSPACE SYSTEMS 2008 PTS 1 AND 2, 2008Co-Authors: Yan Yu, Jin-ping Ou, Chunwei Zhang, Luyu LiAbstract:Large Scale Heavy Derrick Lay Barge is very important for sea work.\nUnder intense wind and wave load, the hook on the Barge will vibrate so\nlarge that in some cases it can not work. Through installing the Tuned\nMass Damper(TMD) on the hook, the vibration will be reduced to a certain\nrange to meet the demand on sea work, which is also important for\nincreasing the efficiency of sea work. To design the suitable TMD for\nthe hook, the dynamical parameters should be specified beforehand.\nGenerally, the related dynamical parameters such as inclinometer and\nacceleration are measured by wire sensors. But due to the restriction of\nthe actual condition, the wire sensors are very hard to implement.\nRecently, the wireless sensors have been presented to overcome the\nshortcomings of wire ones. It is more suitable and also convenient to\nutilize wireless sensors to acquire the useful data of large scale heavy\nderrick Lay Barge.\nIn this paper, the hook reducing swing movement control module is\ndesigned for large scale heavy derrick Lay Barge. Secondly, wireles's\ninclinometer sensor system is integrated using the technique of MEMS,\nsensing and wireless communication. Finally, the hook reducing swing\nmovement control module is validated by the developed wireless\ninclinometer data acquisition system. The wireless inclinometer sensor\ncan be used not only in swing monitoring for large scale heavy derrick\nLay Barge's Hook, but also in vibration monitoring for TV tower, large\ncrane. In general, it has great application foreground.
Yan Yu - One of the best experts on this subject based on the ideXlab platform.
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A swing control module for large off-shore hook structures: Design and validation using a wireless inclination measurement system
International Journal of Innovative Computing Information and Control, 2010Co-Authors: Yan Yu, Jin-ping Ou, Luyu Li, Chunwei ZhangAbstract:In order to reduce the vibration under intense wind and wave load to\nmeet the demand on sea work and further increase the working efficiency\nfor Lager Scale Heavy Derrick Lay Barge, an innovative Tuned Mass Damper\n(TMD) based swing control module for the hook is designed and validated.\nThe,vibration model of Lanjiang Hook is developed and a TMD control\nmodule for Lanjiang hook is provided. Based on the vibration model, the\ncontrol module and actual application, a new gear-pendulum-type TMD\ncontrol system including pendulum and inverted pendulum is presented so\nas to realize the control of the structure that has a long period,\nespecially when there is a strict space requirement for the size of the\ncontrol device to be small such as the application of control device on\nLanjiang hook. The analysis of the proposed control system's parameters\nshows the suitable ones for the whole control system work effectively.\nFinally, the validation experiment for the presented control system\nusing a wireless inclination measurement system is conducted.\nExperimental results show that, the wireless inclination measurement\nsystem can be used more conveniently in swing monitoring for the hook\ncontrol of Lager Scale Heavy Derrick Lay Barge. Furthermore, the control\neffect of the developed TMD system is at least 33 percent which also\nvalidates the effectiveness and feasibility of the proposed control\nsystem for improving the swing movement of large hook model.
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Wireless inclinometer acquisition system for reducing swing movement control module experiment of hook model
SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL MECHANICAL AND AEROSPACE SYSTEMS 2008 PTS 1 AND 2, 2008Co-Authors: Yan Yu, Jin-ping Ou, Chunwei Zhang, Luyu LiAbstract:Large Scale Heavy Derrick Lay Barge is very important for sea work.\nUnder intense wind and wave load, the hook on the Barge will vibrate so\nlarge that in some cases it can not work. Through installing the Tuned\nMass Damper(TMD) on the hook, the vibration will be reduced to a certain\nrange to meet the demand on sea work, which is also important for\nincreasing the efficiency of sea work. To design the suitable TMD for\nthe hook, the dynamical parameters should be specified beforehand.\nGenerally, the related dynamical parameters such as inclinometer and\nacceleration are measured by wire sensors. But due to the restriction of\nthe actual condition, the wire sensors are very hard to implement.\nRecently, the wireless sensors have been presented to overcome the\nshortcomings of wire ones. It is more suitable and also convenient to\nutilize wireless sensors to acquire the useful data of large scale heavy\nderrick Lay Barge.\nIn this paper, the hook reducing swing movement control module is\ndesigned for large scale heavy derrick Lay Barge. Secondly, wireles's\ninclinometer sensor system is integrated using the technique of MEMS,\nsensing and wireless communication. Finally, the hook reducing swing\nmovement control module is validated by the developed wireless\ninclinometer data acquisition system. The wireless inclinometer sensor\ncan be used not only in swing monitoring for large scale heavy derrick\nLay Barge's Hook, but also in vibration monitoring for TV tower, large\ncrane. In general, it has great application foreground.
Luyu Li - One of the best experts on this subject based on the ideXlab platform.
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A swing control module for large off-shore hook structures: Design and validation using a wireless inclination measurement system
International Journal of Innovative Computing Information and Control, 2010Co-Authors: Yan Yu, Jin-ping Ou, Luyu Li, Chunwei ZhangAbstract:In order to reduce the vibration under intense wind and wave load to\nmeet the demand on sea work and further increase the working efficiency\nfor Lager Scale Heavy Derrick Lay Barge, an innovative Tuned Mass Damper\n(TMD) based swing control module for the hook is designed and validated.\nThe,vibration model of Lanjiang Hook is developed and a TMD control\nmodule for Lanjiang hook is provided. Based on the vibration model, the\ncontrol module and actual application, a new gear-pendulum-type TMD\ncontrol system including pendulum and inverted pendulum is presented so\nas to realize the control of the structure that has a long period,\nespecially when there is a strict space requirement for the size of the\ncontrol device to be small such as the application of control device on\nLanjiang hook. The analysis of the proposed control system's parameters\nshows the suitable ones for the whole control system work effectively.\nFinally, the validation experiment for the presented control system\nusing a wireless inclination measurement system is conducted.\nExperimental results show that, the wireless inclination measurement\nsystem can be used more conveniently in swing monitoring for the hook\ncontrol of Lager Scale Heavy Derrick Lay Barge. Furthermore, the control\neffect of the developed TMD system is at least 33 percent which also\nvalidates the effectiveness and feasibility of the proposed control\nsystem for improving the swing movement of large hook model.
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Wireless inclinometer acquisition system for reducing swing movement control module experiment of hook model
SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL MECHANICAL AND AEROSPACE SYSTEMS 2008 PTS 1 AND 2, 2008Co-Authors: Yan Yu, Jin-ping Ou, Chunwei Zhang, Luyu LiAbstract:Large Scale Heavy Derrick Lay Barge is very important for sea work.\nUnder intense wind and wave load, the hook on the Barge will vibrate so\nlarge that in some cases it can not work. Through installing the Tuned\nMass Damper(TMD) on the hook, the vibration will be reduced to a certain\nrange to meet the demand on sea work, which is also important for\nincreasing the efficiency of sea work. To design the suitable TMD for\nthe hook, the dynamical parameters should be specified beforehand.\nGenerally, the related dynamical parameters such as inclinometer and\nacceleration are measured by wire sensors. But due to the restriction of\nthe actual condition, the wire sensors are very hard to implement.\nRecently, the wireless sensors have been presented to overcome the\nshortcomings of wire ones. It is more suitable and also convenient to\nutilize wireless sensors to acquire the useful data of large scale heavy\nderrick Lay Barge.\nIn this paper, the hook reducing swing movement control module is\ndesigned for large scale heavy derrick Lay Barge. Secondly, wireles's\ninclinometer sensor system is integrated using the technique of MEMS,\nsensing and wireless communication. Finally, the hook reducing swing\nmovement control module is validated by the developed wireless\ninclinometer data acquisition system. The wireless inclinometer sensor\ncan be used not only in swing monitoring for large scale heavy derrick\nLay Barge's Hook, but also in vibration monitoring for TV tower, large\ncrane. In general, it has great application foreground.
Herdiyanti Jihan - One of the best experts on this subject based on the ideXlab platform.
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Comparisons study of S-Lay and J-Lay methods for pipeline installation in ultra deep water
University of Stavanger Norway, 2013Co-Authors: Herdiyanti JihanAbstract:The pipeline industry has developed its technical capabilities to enable operations in deeper water. In ultra deepwater developments, the offshore industry has been challenged to solve demanding tasks, to develop new and reliable installation technologies for deepwater and uneven seafloor conditions, and to discover technology to deal with harsh environmental conditions. Pipeline installation in deeper water area needs special considerations regarding the Lay vessel capabilities. These capabilities are that the vessel should have enough tension capacity for the deeper water and good dynamic positioning system restricted to small movements only. Two common methods used to install pipeline are the S-Lay and J-Lay methods. Some parameters need to be considered when choosing the appropriate installation method, therefore limitations for each methods are investigated. For the S-Lay method, these important parameters Include vessel tension capacity, stinger length, stinger curvature, strain in the overbend region and bending moment in the sagbend region. The maximum depth at which a given pipeline can be laid could be increased with a longer stinger of the Lay Barge and bigger vessel tension capacity. However, choosing these options may require clamping to pull the pipeline that can cause a heavy mooring system and high risk associated with a very long stinger subject to hydrodynamic forces. In addition, these options also could destroy the pipe coating. On the contrary with the S-Lay method, the J-Lay method reduces any horizontal reaction on the vessel’s equipment, and because of this, the J-Lay technology might be used to meet project requirements in deeper water. However, the capability of the J-Lay method in deep and very deep waters requires Barges with dynamic positioning capabilities. This is because positioning by spread mooring with anchors would always be worthless and often unfeasible due to the safety of operations. Under extreme conditions, the loading process induced by the Lay Barge response to wave actions in deep waters is less severe for J-Lay method compared to other methods. However, special attention has to be paid to the complex nature of vortex shedding induced oscillations along the suspended pipeline span. Considering the aspects mentioned above, studies will be carried out in this master thesis. The thesis will expose two pipeline installation methods, i.e. S-Lay and J-Lay methods for various water depths and pipe sizes. Starting from 800 m to 4000 m water depth, pipe sizes more than 24 inch will be investigated. The effect of increasing strain in the overbend region and effect of reducing the stinger length will be studied to meet these challenges and to improve the Laying efficiency especially using the S-Lay method. Plot for various water depths and pipeline properties will be presented as the results of this master thesis. The installation analysis will be performed by using computer program SIMLA
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Comparisons study of S-Lay and J-Lay methods for pipeline installation in ultra deep water
University of Stavanger Norway, 2013Co-Authors: Herdiyanti JihanAbstract:Master's thesis in Offshore technologyThe pipeline industry has developed its technical capabilities to enable operations in deeper water. In ultra deepwater developments, the offshore industry has been challenged to solve demanding tasks, to develop new and reliable installation technologies for deepwater and uneven seafloor conditions, and to discover technology to deal with harsh environmental conditions. Pipeline installation in deeper water area needs special considerations regarding the Lay vessel capabilities. These capabilities are that the vessel should have enough tension capacity for the deeper water and good dynamic positioning system restricted to small movements only. Two common methods used to install pipeline are the S-Lay and J-Lay methods. Some parameters need to be considered when choosing the appropriate installation method, therefore limitations for each methods are investigated. For the S-Lay method, these important parameters Include vessel tension capacity, stinger length, stinger curvature, strain in the overbend region and bending moment in the sagbend region. The maximum depth at which a given pipeline can be laid could be increased with a longer stinger of the Lay Barge and bigger vessel tension capacity. However, choosing these options may require clamping to pull the pipeline that can cause a heavy mooring system and high risk associated with a very long stinger subject to hydrodynamic forces. In addition, these options also could destroy the pipe coating. On the contrary with the S-Lay method, the J-Lay method reduces any horizontal reaction on the vessel’s equipment, and because of this, the J-Lay technology might be used to meet project requirements in deeper water. However, the capability of the J-Lay method in deep and very deep waters requires Barges with dynamic positioning capabilities. This is because positioning by spread mooring with anchors would always be worthless and often unfeasible due to the safety of operations. Under extreme conditions, the loading process induced by the Lay Barge response to wave actions in deep waters is less severe for J-Lay method compared to other methods. However, special attention has to be paid to the complex nature of vortex shedding induced oscillations along the suspended pipeline span. Considering the aspects mentioned above, studies will be carried out in this master thesis. The thesis will expose two pipeline installation methods, i.e. S-Lay and J-Lay methods for various water depths and pipe sizes. Starting from 800 m to 4000 m water depth, pipe sizes more than 24 inch will be investigated. The effect of increasing strain in the overbend region and effect of reducing the stinger length will be studied to meet these challenges and to improve the Laying efficiency especially using the S-Lay method. Plot for various water depths and pipeline properties will be presented as the results of this master thesis. The installation analysis will be performed by using computer program SIMLA.2015-06-1
Jin-ping Ou - One of the best experts on this subject based on the ideXlab platform.
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A swing control module for large off-shore hook structures: Design and validation using a wireless inclination measurement system
International Journal of Innovative Computing Information and Control, 2010Co-Authors: Yan Yu, Jin-ping Ou, Luyu Li, Chunwei ZhangAbstract:In order to reduce the vibration under intense wind and wave load to\nmeet the demand on sea work and further increase the working efficiency\nfor Lager Scale Heavy Derrick Lay Barge, an innovative Tuned Mass Damper\n(TMD) based swing control module for the hook is designed and validated.\nThe,vibration model of Lanjiang Hook is developed and a TMD control\nmodule for Lanjiang hook is provided. Based on the vibration model, the\ncontrol module and actual application, a new gear-pendulum-type TMD\ncontrol system including pendulum and inverted pendulum is presented so\nas to realize the control of the structure that has a long period,\nespecially when there is a strict space requirement for the size of the\ncontrol device to be small such as the application of control device on\nLanjiang hook. The analysis of the proposed control system's parameters\nshows the suitable ones for the whole control system work effectively.\nFinally, the validation experiment for the presented control system\nusing a wireless inclination measurement system is conducted.\nExperimental results show that, the wireless inclination measurement\nsystem can be used more conveniently in swing monitoring for the hook\ncontrol of Lager Scale Heavy Derrick Lay Barge. Furthermore, the control\neffect of the developed TMD system is at least 33 percent which also\nvalidates the effectiveness and feasibility of the proposed control\nsystem for improving the swing movement of large hook model.
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Wireless inclinometer acquisition system for reducing swing movement control module experiment of hook model
SENSORS AND SMART STRUCTURES TECHNOLOGIES FOR CIVIL MECHANICAL AND AEROSPACE SYSTEMS 2008 PTS 1 AND 2, 2008Co-Authors: Yan Yu, Jin-ping Ou, Chunwei Zhang, Luyu LiAbstract:Large Scale Heavy Derrick Lay Barge is very important for sea work.\nUnder intense wind and wave load, the hook on the Barge will vibrate so\nlarge that in some cases it can not work. Through installing the Tuned\nMass Damper(TMD) on the hook, the vibration will be reduced to a certain\nrange to meet the demand on sea work, which is also important for\nincreasing the efficiency of sea work. To design the suitable TMD for\nthe hook, the dynamical parameters should be specified beforehand.\nGenerally, the related dynamical parameters such as inclinometer and\nacceleration are measured by wire sensors. But due to the restriction of\nthe actual condition, the wire sensors are very hard to implement.\nRecently, the wireless sensors have been presented to overcome the\nshortcomings of wire ones. It is more suitable and also convenient to\nutilize wireless sensors to acquire the useful data of large scale heavy\nderrick Lay Barge.\nIn this paper, the hook reducing swing movement control module is\ndesigned for large scale heavy derrick Lay Barge. Secondly, wireles's\ninclinometer sensor system is integrated using the technique of MEMS,\nsensing and wireless communication. Finally, the hook reducing swing\nmovement control module is validated by the developed wireless\ninclinometer data acquisition system. The wireless inclinometer sensor\ncan be used not only in swing monitoring for large scale heavy derrick\nLay Barge's Hook, but also in vibration monitoring for TV tower, large\ncrane. In general, it has great application foreground.