Simulation of Ship-Ice Collision Using a Constitutive Model of Ice Material Considering the Effect of Temperature
- Tongqiang Yu (Jiangsu University of Science and Technology) | Kun Liu (Jiangsu University of Science and Technology) | Qingfeng Wang (Jiangsu University of Science and Technology) | Jiaxia Wang (Jiangsu University of Science and Technology)
- Document ID
- International Society of Offshore and Polar Engineers
- The 28th International Ocean and Polar Engineering Conference, 10-15 June, Sapporo, Japan
- Publication Date
- Document Type
- Conference Paper
- 2018. International Society of Offshore and Polar Engineers
- temperature, ice material constitutive, ship-ice collision, ship structures
- 0 in the last 30 days
- 18 since 2007
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The fully opening of the northern shipping line puts forward a great challenge for the safety of polar ships, the presence of floating ice and icebergs increases the possibility of collision between ship and sea ice. However, due to the complex mechanical properties of sea ice, a reasonable description of its material constitutive relation is the main factor affecting the accusation of calculation and analysis.
In this paper, a constitutive model of ice material considering the effect of temperature is presented, a user-defined subroutine is developed and embedded into the finite element software LS-DYNA. The experimental and numerical studies of marine steel are carried out. Based on this, the collision scenario is established, the damage and deformation characteristics of the ship structure and ice are studied, The effects of collision scenario parameters are discussed. The results of this paper can provide reference for the design and manufacture of polar ships.
Arctic sea ice, especially summer sea ice, is declining at a rate of 10% every ten years (Richter M J, 2008a). The fully opening of the Arctic sea lanes is becoming possible and the polar shipping industry is bound to boom. However, due to the complicated environmental features in polar water, the strength of ships in polar waters is gaining more and more attention due to numerous ice floe and icebergs even in summer. Ship-ice collision will cause damage to ships, water or even sink and other consequences, bringing about significant loss of life and property. Therefore, the research on the collision performance of polar ships is essential to reduce the accident loss of polar ice collision and as well as the design of polar ships.
A reasonable description of sea ice's material properties plagued the scholars for years, the main obstacles are its various components and random inherent effects. Dozens of studies has been done in this area (Paige R A, 1967; Peyton H R, 1968; Timco G W, 2010). Full scale real ship-ice collision tests or ship model tests are also carried out in order to study the loading force during the collision process (Ritch R, 2008b; Valanto, 2001c). These results is available in deducing empirical formulas and analytical equations. For example, Dempsey (2001a) and Ian J. Jordaan (2001c) proposed the analytical methods for ice loading and ice pressure calculation and pointed out that sea ice had a clear scale effect. Frederking R. (2011b) studied the effect of strain rate on ice loading through comparative experiments. In recent years, with the rapid development of computer simulation technology, commercial finite element analysis software is increasingly used to simulate sea ice material and ice load as a more concise and effective way. Many material constitutive models are modified or justified to describe the iteration between the structure and sea ice reasonably(Gagnon, 2006a; Shunying Ji, 2002; Carney, 2006b ). Among them, crushable foam materials is widely accepted as for its rationality to reflect the brittleness of ice and good consistency with the experiment, but it does not have physical definitions as well as neglects the impact of damage. Other material constitutive models like Viscouselastic- plastic, elastic-plastic, and elastic-brittle sea ice material(Liu, 2012; Derradji, 2000a; Derradji, 2001b) are also detruded by different scholar in accordance with their focus point and research content.
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