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쐐기형 모형선 주위 연속 쇄빙과정에 관한 입자 기반 수치 시뮬레이션Particle-based Numerical Simulation of Continuous Ice Breaking Process around Wedge-type Model Ship

Other Titles
Particle-based Numerical Simulation of Continuous Ice Breaking Process around Wedge-type Model Ship
Authors
Ren Di신우진김동현박종천정성엽
Issue Date
2020
Publisher
대한조선학회
Keywords
Ice resistance(빙 저항); Particle-based simulation(입자기반 시뮬레이션); Continuous ice breaking(연속 쇄빙); Model ship with wedge-type bow(쐐기형 선수 모형선); 3-point bending test(3점 굽힘 시험)
Citation
대한조선학회 논문집, v.57, no.1, pp 23 - 34
Pages
12
Journal Title
대한조선학회 논문집
Volume
57
Number
1
Start Page
23
End Page
34
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/292
DOI
10.3744/SNAK.2020.57.1.023
ISSN
1225-1143
Abstract
This paper covers the development of prediction techniques for ice load on ice-breakers operating in continuous ice-breaking under level ice conditions using particle-based continuum mechanics. Ice is assumed to be a linear elastic material until the fracture occurs. The maximum normal stress theory is used for the criterion of fracture. The location of the crack can be expressed using a local scalar function consisting of the gradient of the first principal stress and the corresponding eigen-vector. This expression is used to determine the relative position of particle pair to the new crack. The Hertz contact model is introduced to consider the collisions between ice fragments and the collisions between hull and ice fragments. In order to verify the developed technique, the simulation results for the three-point bending problems of ice-specimen and the continuous ice-breaking problem around a wedge-type model ship with bow angle of 20°are compared with the experimental results carrying out at Korea Research Institute of Ships and Ocean Engineering (KRISO).
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