极地研究

极地研究 ›› 2008, Vol. 19 ›› Issue (2-English): 237-248.

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Mechanical and numerical models for sea ice dynamics on small-meso scale

Ji Shunying1,2, Wang Anliang1, Li Hai3 and Yue Qianjin1   

  1. 1 State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 11602, China;
    2 Key Laboratory of Polar Sciecnce of the State Oceanic Administration, Shanghai 200136, China;
    3 National Marine Environment Forecast Center, Beijing 100081, China
  • 出版日期:1958-06-30 发布日期:1958-06-30
  • 通讯作者: Ji Shunying

Mechanical and numerical models for sea ice dynamics on small-meso scale

Ji Shunying1,2, Wang Anliang1, Li Hai3 and Yue Qianjin1   

  1. 1 State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian 11602, China;
    2 Key Laboratory of Polar Sciecnce of the State Oceanic Administration, Shanghai 200136, China;
    3 National Marine Environment Forecast Center, Beijing 100081, China
  • Online:1958-06-30 Published:1958-06-30
  • Contact: Ji Shunying

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摘要：

On small-meso scale, the sea ice dynamic characteristics are quite different from that on large scale. To model the sea ice dynamics on small-meso scale, a new elastic-viscous-plastic (EVP) constitutive model and a hybrid Lagrangian-Eulerian (HLE) numerical method are developed based on continuum theory. While a modified discrete element model (DEM) is introduced to model the ice cover at discrete state. With the EVP constitutive model, the numerical simulation for ice ridging in an idealized rectangular basin is carried out and the results are comparable with the analytical solution of jam theory. Adopting the HLE numerical model, the sea ice dynamic process is simulated in a vortex wind field. The furthering application of DEM is discussed in details for modeling the discrete distribution of sea ice. With this study, the mechanical and numerical models for sea ice dynamics can be improved with high precision and computational efficiency.

关键词: sea ice dynamics, constitutive model, numerical method, discrete element model, small-meso scale

Abstract:

On small-meso scale, the sea ice dynamic characteristics are quite different from that on large scale. To model the sea ice dynamics on small-meso scale, a new elastic-viscous-plastic (EVP) constitutive model and a hybrid Lagrangian-Eulerian (HLE) numerical method are developed based on continuum theory. While a modified discrete element model (DEM) is introduced to model the ice cover at discrete state. With the EVP constitutive model, the numerical simulation for ice ridging in an idealized rectangular basin is carried out and the results are comparable with the analytical solution of jam theory. Adopting the HLE numerical model, the sea ice dynamic process is simulated in a vortex wind field. The furthering application of DEM is discussed in details for modeling the discrete distribution of sea ice. With this study, the mechanical and numerical models for sea ice dynamics can be improved with high precision and computational efficiency.

Key words: sea ice dynamics, constitutive model, numerical method, discrete element model, small-meso scale