Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, "Simulation of Load Lifting with Equalizers Used in Shipyards", Automation in Construction, Vol. 61, pp. 98-111, 2016.02.01
International Journal
2015.08.26 15:32
Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, "Simulation of Load Lifting with Equalizers Used in Shipyards", Automation in Construction, Vol. 61, pp. 98-111, 2016.02.01
조회 수 431
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Abstract | One of the most commonly used pieces of equipment for lifting a load is the equalizer of a crane in shipbuilding production. The equalizer distributes the tension in wire ropes between the load and equipment equally. While the equalizer is composed simply of several fixed and moving pulleys, themechanismof an equalizer is not easy to adapt to physics-based simulations because only onewire rope is coiled around all of the pulleys. Thus, instead of the real mechanism of the equalizer, an alternative mechanism, such as stretching or shortening the initial lengths of the wire ropes, logically, has been used in previous simulations. In this study, a mass-less constraint-based wire rope is adopted to realize the real mechanism of the equalizer. The constant length constraint is used to realize one wire rope among the fixed and moving equalizer pulleys. We derive a discrete Euler–Lagrange (DEL) equation to represent the motion of a multibody system including the constraint wire ropes. The DEL equation is shown to be numerically stable for the case of linear holonomic constraints, such as the constant length constraint. Wetest several series of fixed and moving pulleys andmodel the equalizer based on the real mechanism. Finally, the equalizer based on the real mechanism is applied to two typical lifting cases in shipbuilding production. One is lifting a load using a Goliath cranewith three equalizers and the other is to use a floating cranewith one equalizer and two crawler cranes. As a result, the tensions in the wire ropes connected to the load are adjusted equally as the position of the moving pulleys and the orientation of the equalizer change. |
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Publication Date | 2016-02-01 |
Role | Corresponding Author |
Category | SCIE |
Impact Factor | 2.442 |
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Hye-Won Lee, Myung-Il Roh, Seung-Ho Ham, Nam-Kug Ku, "Coupled Analysis Method of a Mooring System and a Floating Crane Based on Flexible Multibody Dynamics Considering Contact with the Seabed", Ocean Engineering, Vol. 163, pp. 555-569, 2018.09.01
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Sung-Woo Park, Myung-Il Roh, Min-Jae Oh, Seong-Hoon Kim, "Association Analysis of Piping Materials of an Offshore Structure Using Big Data Technology", Journal of Ship Production and Design, Vol. 35, No. 3, pp. 220-230, 2019.08.01
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Seung-Ho Ham, Myung-Il Roh, Luman Zhao, "Integrated Method of Analysis, Visualization, and Hardware for Ship Motion Simulation", Journal of Computational Design and Engineering, Vol. 5, No. 3, pp. 285-298, 2018.07.01
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Luman Zhao, Myung-Il Roh, Seung-Ho Ham, "Anti-Sway Control of the Crane on an Offshore Support Vessel Based on the Hardware-In-The-Loop Simulation", International Journal of Offshore and Polar Engineering, Vol. 28, No. 2, pp. 182-189, 2018.06.01
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Seung-Ho Ham, Myung-Il Roh, Ju-Sung Kim, "Numerical Analysis of Wreck Removal Based on Multibody System Dynamics", Journal of Marine Science and Technology, Vol. 23, No. 3, pp. 521-535, 2018.09.01
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Seung-Ho Ham, Myung-Il Roh, Jung-Woo Hong, “Dynamic Effect of a Flexible Riser in a Fully Connected Semisubmersible Drilling Rig Using the Absolute Nodal Coordinate Formulation”, Journal of Offshore Mechanics and Arctic Engineering, 2017.10.01
CategoryInternational Journal -
Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, Jin-Wuk Hong, Hong-Rae Lee, "Development and Validation of a Simulation-based Safety Evaluation Program for a Mega Floating Crane", Advances In Engineering Software, Vol. 112, pp. 101-116, 2017.10.01
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Seong-Hoon Kim, Myung-Il Roh, Ki-Su Kim, Min-Jae Oh, “Big Data Platform Based on Hadoop and Application to Weight Estimation of FPSO Topside”, Journal of Advanced Research in Ocean Engineering, Vol. 3, No. 1, pp. 32-40, 2017.03.01
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Sung-Min Lee, Myung-Il Roh, Ki-Su Kim, Seung-Ho Ham, "Optimum Design of Lug Arrangement Based on Static and Dynamic Analyses for Block Lifting", Journal of Ship Production and Design, Vol. 34, No. 2, pp. 119-133, 2018.05.01
CategoryInternational Journal -
Dong-Hoon Jeong, Myung-Il Roh, Seung-Ho Ham, Chan-Young Lee, “Performance Analyses of Naval Ships Based on Engineering Level of Simulation at the Initial Design Stage”, IJNAOE, Vol. 9, No. 4, pp. 446-459, 2017.07.01
CategoryInternational Journal -
Sung-Kyoon Kim, Myung-Il Roh, Ki-Su Kim, “Evaluation of Feasibility Index in the Arrangement Design of an Offshore Topside based on the Automatic Transformation of Experts’ Knowledge and the Fuzzy Logic”, Ocean Engineering, Vol. 130, 2017.01.15
CategoryInternational Journal -
Sung-Kyoon Kim, Myung-Il Roh, Ki-Su Kim, “Arrangement Method of Offshore Topside Based on an Expert System and Optimization Technique”, Journal of Offshore Mechanics and Arctic Engineering, Vol. 139, No. 2, pp. 1-19, 2017.04.01
CategoryInternational Journal