Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Study on the structural response of ship shoulder in narrow ice channel using SPH-FEM
Ruitong Chen1, Hui Li1,*, Yan Feng1, Xiangyu Wang1
1College of Shipbuilding Engineering, Harbin Engineering University

Harbin, Heilongjiang, China

Since the commercial shipping of Northeast Passage was carried outlate and mainly concentrated in summer, there are a few studies oncarriers sailing in narrow ice channel in winter. Dobrodeev A et al.
from Krylov State Research Center developed a method for calculationof ship resistance in ice channel based on model test data (Dobrodeev A,2018), and improved it considering carriers asymmetrically sailing(Dobrodeev A et al.,2018; Sazonov K and Dobrodeev A,2021). They
also develop a calculation method for the forces acting on the hull of aship during channel exit (Dobrodeev A et al.,2020). Liu et al.
conducted a numerical simulation of two ships sailing in level ice insequence based on DEM (Liu L and Ji S Y,2021), calculating andanalyzing the ice resistance of the two ships at different speeds and shipwidth ratios (Liu L et al.,2020). The current research mainly focuses on
ice resistance of ships when sailing in ice channel, while there are few
researches on hull’s structural response.

ABSTRACTThe shoulder becomes the main ice breaking area when the carrier issailing in the narrow ice channel of the Arctic. Therefore, it issignificant to study and evaluate the structural response of shoulder. Inthis paper, an ice-water-ship coupling numerical simulation model,
which realizes the simulation of crushed ice slide along the hull after
the ice channel broken, is established based on SPH-FEM. The
numerical simulation of a carrier sailing in the narrow ice channel iscarried out, of which results can well reflect the structural response ofhull shoulder. Simulation results show that the structural stress inicebelt below the waterline is larger during the navigation of carrier.
The research work in this paper can be applied to the ship side-structure
design optimization.

KEY WORDS: Narrow ice channel; SPH-FEM; carrier shoulder;

The SPH method was first proposed by Lucy (1977) and used to solve
astrophysical problems. Due to its meshless properties, good
adaptability and Lagrange properties, it has been coupled with FEM byscholars and is widely used in solving large deformation problems suchas explosion (Ming F R et al.,2016; Jayasinghe L B et al.,2017; Li Y etal.,2020), penetration (Xue B et al.,2021; Mardalizad A et al.,2020) andFSI (Yang Q et al.,2012; Long T et al.,2021). Therefore, the SPH-FEM
method can be used to carry out the research on structural response ofship shoulder in narrow ice channel. Two large deformable objects, iceand water, are simulated with particles, and the hull structure issimulated with finite elements.

structural response; numerical simulation

INTRODUCTION
The Northeast Passage is covered by level ice in winter, requiring
icebreakers to assist LNG carriers to navigate. The LNG carrier sails in
the narrow ice channel behind the icebreaker, as shown in Fig. 1. In thiscase, the ship-ice collision mainly occurs on the shoulder which is
weaker in structure compared to the bow. The structural safety of LNG
carrier is very important, so it is necessary to calculate the structural
response of shoulder when LNG carrier sailing in narrow ice channel.

In this paper, an ice-water-ship coupling numerical simulation model isestablished based on the SPH-FEM method. After verifying the model,
the numerical simulation of the ship sailing in the ice channel wascarried out and the structural response of the hull shoulder wasanalyzed.

ALGORITHM OF NUMERICAL SIMULATION
Fig.1 Schematic diagram of the LNG carrier sails in the narrow icechannelBasic Theory of SPH

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