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 Dynamics of a Payload Influence in the Polar Ship*
Yao Cheng 1), Oleg Gaidai2),Daniil Yurchenko3),Xiaosen Xu4), Song Gao1)
1)

4)

Marine Design and Research Institute of China, Shanghai, China
2)
Shanghai Ocean University, Shanghai, China
3)
University of Southampton, Southampton, UKJiangsu University of Science and Technology, Zhenjiang, ChinaABSTRACT

improvement of the polar transportation, operation and rescue abilities.
Because Air-cushion Ice-breaking/Transportation platform is carried byicebreakers, usually icebreakers have a crane, which is controlled by acrane operator to conduct launch and recovery air cushion
vehicle(ACV). A payload connected to the crane hook and hanging on
the cable usually is modelled as a mathematical pendulum, thereby
organizing a single-degree-of-freedom (SDOF) system.

Polar research has important scientific value has brought attention ofmany countries and motivated further exploration of new technologies
for enabling operations in the adverse unfriendly environmentalconditions. In China researcher want to develop an new air cushionveicle(ACV). To deliver ACV and people to this region a ship will
have to withstand the harsh conditions and interact with icebergs andlarge floating ice pieces. This interaction may result in impact typeloading of a ship hull by ice, preventing a planned navigation and evencausing to abort some routine operations like launch and recovery ofcargo or other equipment (ACV, boats, cars, ROVs and AUVs, etc.).
This paper studied the influence of such vibroimpact interaction
between the ice and ship onto the recovery capabilities of the ship. The
main goal of this study is to understand the influence of the vibroimpact
motion onto the dynamics of the payload in order to prevent collision
between the payload and the ship’s hull. Results of the numericalsimulations are presented.

Considerable literature exists on the ship-based crane models andpayload dynamics, including crane models with several control options(luff, slew, overhead, hoist), each of which adds another DOF to themodel, under deterministic or random excitations(Vaughters, 1997,Abdel-Rahman, 2003; Witz, 1995; Ellermann, 2002; Idres, 2003;
Yurcheko 2014). The main danger during such an operation is in thecase if the payload starts to oscillates and collide the ship’s hull, cause
substantial damage since the mass of the payload is usually high andcan reach several tones, depending on the type of the payload (ACV,cargo, AUV, submarine, etc.). This may happen due to a number ofreasons, one of which is the ship’s roll motion. In the icy environment
the roll dynamics of the ship can be accompanied by impacting motionof the ship against ice floe, ice sheets or icebergs(Naess 2012). Such amodel was proposed in where the authors were focused on the shipdynamics with an impacting interaction. Mathematically this problem
was reduced to a problem of stability and instability (capsizing) of theship motion in the presence of impacts and grazing bifurcation, which
separates the regime of motion with and without impacts.

KEY WORDS: Offshore crane; roll motion; stochastic dynamics;
vibroimpact.

1.INTRODUCTION
Polar research has important scientific value. Moreover, the Arctic
Ocean can also be considered as a strategic maritime shipping route,which is barely used so far since it remains covered by ice most of thetime. To go from Europe to the China ships have to pass theMediterranean SEA, cross Suez Canal and Malacca strait, which is theshortest distance, currently available to the ships. This distance could
be significantly reduced if ships could go through areas covered withice, saving time and cost of shipment. Thus, the importance of theArctic region is hard to overestimate from different points of view,
including scientific research, which has been conducted by a number ofcountries, which established small laboratories in different parts of theregion.
It is of great significance to develop an Air-cushion Ice-breaking
platform with both ice-breaking and transportation function on theincrease of the navigation tiom of the Arctic Passage and theFigure 1. Motion of a ship transmitted to the payload vibration.

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