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Heave Compensator를 고려한 파랑 중 해상 크레인 설치작업 수치해석Numerical Analysis of Offshore Installation Using a Floating Crane with Heave Compensator in Waves

Other Titles
Numerical Analysis of Offshore Installation Using a Floating Crane with Heave Compensator in Waves
Authors
남보우홍사영김종욱이동엽
Issue Date
29-2월-2012
Publisher
한국해양공학회
Keywords
Floating crane; Heave compensator; Wave-induced motion; tension; Lowering simulation
Citation
한국해양공학회지, v.26, no.1, pp 70 - 77
Pages
8
Journal Title
한국해양공학회지
Volume
26
Number
1
Start Page
70
End Page
77
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/7957
ISSN
1225-0767
2287-6715
Abstract
In this study, a numerical analysis of offshore installation using a floating crane with heave compensator is carried out in time domain. The motion analysis of crane vessels is based on floating body dynamics using convolution integral and the crane wire is treated as simple spring. Lifted structure is assumed as a rigid body with 3 degree-of-freedom translational motion. Heave compensator is numerically modelled by the generalized spring-damper system. Firstly, forced motion simulations of crane wire system are carried out to figure out the basic principle of heave compensator. The transfer function of crane wire system is obtained and effective wave period of heave compensator are found. Then, coupled analysis of crane vessel, crane wire, and lifted structure are performed in regular and irregular sea conditions. Two different crane vessels and two lifted structures (suction pile and manifold) are considered in this study. Through a series of numerical calculations, the effective zone of heave compensator is investigated with respect to wave period and crane wire length. and the crane wire is treated as simple spring. Lifted structure is assumed as a rigid body with 3 degree-of-freedom translational motion. Heave compensator is numerically modelled by the generalized spring-damper system. Firstly, forced motion simulations of crane wire system are carried out to figure out the basic principle of heave compensator. The transfer function of crane wire system is obtained and effective wave period of heave compensator are found. Then, coupled analysis of crane vessel, crane wire, and lifted structure are performed in regular and irregular sea conditions. Two different crane vessels and two lifted structures (suction pile and manifold) are considered in this study. Through a series of numerical calculations, the effective zone of heave compensator is investigated with respect to wave period and crane wire length.
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