Seung-Ho Ham, Myung-Il Roh, “Time-domain Structural Analysis During Block Turnover and Lifting Using 2D Flexible Multibody Dynamics”, Marine Structures, Vol. 75, pp. 102841.1-26, 2021.01.01

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Abstract	Ship construction involves the assembly of several blocks on a dock. When a block is lifted using a crane, it undergoes deformation. Until now, structural analysis has been applied in a few cases to evaluate the stress on such blocks. Therefore, this study proposes an evaluation method for time- domain stress using 2D flexible multibody dynamics. We adopt the discrete Euler-Lagrange equation to achieve robustness during the numerical integration of problems that involve high stiffness. We formulate the equations of motion of 2D shell elements based on the absolute nodal coordinate formulation, which is an efficient analysis technique for nonlinear and large defor-mation cases. We also derive the two types of kinematic constraints (ball and fixed joints) be-tween the rigid and shell element, which can be attached to an arbitrary point. Based on the theories, we develop the program to build models, including 2D flexible multibody dynamics and several joints, and to solve the equations of motion efficiently. As a result, it is successfully applied to the dynamic analysis of the block turnover by a gantry crane and the block lifting by a floating crane. The von-Mises stresses that change over time are compared to the maximum yield stress and analyzed according to the wave direction.
Publication Date	2021-01-01
Role	Corresponding Author
Category	SCIE
Impact Factor	3.960

Seung-Ho Ham, Myung-Il Roh, “Time-domain Structural Analysis During Block Turnover and Lifting Using 2D Flexible Multibody Dynamics”, Marine Structures, Vol. 75, pp. 102841.1-26, 2021.01.01

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Seung-Ho Ham, Myung-Il Roh, “Time-domain Structural Analysis During Block Turnover and Lifting Using 2D Flexible Multibody Dynamics”, Marine Structures, Vol. 75, pp. 102841.1-26, 2021.01.01

단축키

단축키

오민재, 노명일, 김범수, 김용환, “선박 내항성능 해석을 위한 선형 곡면으로부터의 오프셋 생성 프로그램 개발”, 한국CDE학회 논문집, Vol. 24, No. 2, pp. 1-10, 2019.06.01

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Seung-Ho Ham, Myung-Il Roh, Hye-Won Lee, "Collision Detection and Response of Multibody Systems Using a Position Difference Method and Non-Interpenetration Constraint in Shipbuilding Simulation", Ocean Engineering, Vol. 195, pp. 1-18, 2020.01.01

Joo-Pil Lee, Myung-Il Roh, Hye-Won Lee, Seung-Ho Ham, "Design of a Wreck Removal Method Considering Safety and Economy", Ships and Offshore Structures, Vol. 15, No. 10, pp. 1037-1056, 2020.12.01

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Seong-Hoon Kim, Myung-Il Roh, Min-Jae Oh, Sung-Woo Park, "Estimation of Ship Operational Efficiency from AIS Data Using Big Data Technology", IJNAOE, Vol. 12, pp. 440-453, 2020.05.21

Do-Hyun Chun, Myung-Il Roh, Seung-Ho Ham, “Optimum Arrangement Design of Mastic Ropes for Membrane-type LNG Tanks Considering the Flatness of Thermal Insulation Panel and Production Cost”, Journal of Marine Science and Engineering, Vol. 8, No. 5

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Hye-Won Lee, Myung-Il Roh, Seung-Ho Ham, "Underactuated Crane Control for the Automation of Block Erection in Shipbuilding", Automation in Construction, Vol. 124, pp. 1-28, 2021.04.01

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