A viscoelastic-plastic constitutive model with Mohr-Coulomb yielding criterion for sea ice dynamics

查看全文 作　　者：JI [1]Shunying;SHEN Hung [2]Tao;WANG [2]Zhilian;SHEN H [2]Hayley;YUE [1]Qianjin 机构地区：[1]State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China;[2]Department of Civil and Environmental Engineering, Clarkson University, Potsdam, New York 13699-5710, USA 出　　处：《Acta Oceanologica Sinica》索引2005年第24卷第4期,共12页 基　　金：The authors would like to acknowledge the supports by the National Natural Science Foundation of China under contract No.40206004;partly by the East-Asia and Pacific Program of US National Science Foundation under contract No.INT-9912246. 摘　　要：A new viscoelastic-plastic (VEP) constitutive model for sea ice dynamics was developed based on continuum mechanics. This modelconsists of four components: Kelvin-Vogit viscoelastic model, Mohr-Coulomb yielding criterion, associated normality flow rule forplastic rehololgy, and hydrostatic pressure. The numerical simulations for ice motion in an idealized rectangular basin were made usingsmoothed particle hydrodynamics (SPH) method, and compared with the analytical solution as well as those based on the modified vis-cous plastic(VP) model and static ice jam theory. These simulations show that the new VEP model can simulate ice dynamics accu-rately. The new constitutive model was further applied to simulate ice dynamics of the Bohai Sea and compared with the traditionalVP, and modified VP models. The results of the VEP model are compared better with the satellite remote images, and the simulated iceconditions in the JZ20-2 oil platform area were more reasonable. 关 键 词：海冰 动力学 黏弹性塑料 VP模型