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파랑 중 해상 크레인의 하강 작업 수치 시뮬레이션Lowering Simulation using Floating Crane in Waves

Other Titles
Lowering Simulation using Floating Crane in Waves
Authors
남보우홍사영김병완이동엽
Issue Date
2012
Publisher
한국해양공학회
Keywords
Floating crane 해상크레인; Lowering simulation 하강 시뮬레이션; Upending simulation 상승 시뮬레이션; Wave-induced motion 파랑운동; Tension 장력; Winch 윈치
Citation
한국해양공학회지, v.26, no.1, pp 17 - 26
Pages
10
Journal Title
한국해양공학회지
Volume
26
Number
1
Start Page
17
End Page
26
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/1029
ISSN
1225-0767
2287-6715
Abstract
A coupled analysis of a floating crane barge with a crane wire and hanging structure is carried out in thetime domain. The motion analysis of the crane barge is based on the floating multi-body dynamics, and thecrane wire is modeled as a simple spring tension. The hanging structure is assumed to be a rigid body with 3 degree-of-freedom translational motion. In this study, numerical simulations were conducted at three different stages. First, the developed code was validated by comparing the time-domain motion response of a crane barge with the frequency-domain results. Then, a coupled analysis of a crane barge and simple structure hanging by the crane wire was performed using the present scheme. The motion response and wire tension from the present calculations are compared with the results of OrcaFlex. The agreement between the two sets of results isfairly good. Last, lowering simulations in regular and irregular waves were conducted considering buoyancy changes in the hanging structure. The effects of the wave conditions, structure's weight, wire length, and lowering speed on the wire tension are considered.
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