渤海海冰动力学中的粘弹塑性本构模型

Viscous-elastic-plastic constitutive model for sea ice dynamics in the Bohai Sea

在粘塑性海冰本构模型的基础上 ,将Kelvin Voigt粘弹性本构理论引入到海冰动力学中 ,进而建立了粘弹塑性海冰本构模型。该模型可较好地反映渤海海冰在小应变和小应变率条件下的粘弹性力学行为 ,同时还考虑了大应变率下的海冰粘塑性力学行为。对渤海辽东湾海冰进行了 48h数值模拟。结果表明 :粘弹塑性海冰本构方程较Hibler的粘塑性本构模型可更好地处理渤海的冰间相互作用 ,提高海冰数值模拟的计算精度。

The viscous plastic constitutive model for sea ice dynamics has been widely applied in sea ice numerical simulations of the polar regions and their marginal ice zones.This model,however, can't be used to simulate the ice rafting and ridging processes that occur over small temporal and spatial scales.This presents a problem in the Bohai Sea where due to the dynamic conditions that exist, these processes are significant factors.To remedy this situation, the Kelvin Voigt viscous elastic constitutive equation was introduced into the sea ice dynamics, and a viscous elastic plastic constitutive model was developed based on the viscous plastic model.In the numerical sea ice simulation, both the viscous elastic behavior under small strains and strain rates, and the viscous plastic behavior under high strains and strain rates can be properly modeled.The sea ice dynamic process of Liaodong Bay was simulated for 48 hours, and the results indicate that the viscous elastic plastic model is more accurate