Discrete-element model for the interaction between ocean waves and sea ice.
Discrete-element model for the interaction between ocean waves and sea ice.
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DOI：
10.1103/physreve.85.016703
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发表时间：
2012-01
期刊：
影响因子：
--
通讯作者：
Zhijie Xu;A. Tartakovsky;Wenxiao Pan
中科院分区：
文献类型：
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作者：
Zhijie Xu;A. Tartakovsky;Wenxiao Pan
提出了一种离散单元法(DEM)模型来模拟海冰对海浪的响应。海浪和海冰的相互作用可能会导致海冰的破裂和破碎，具体取决于海浪的幅度和周期。海冰的破裂行为用DEM方法显式模拟，其中海冰由密实堆积的有限大小的球形颗粒模拟。这些颗粒在它们的接触点通过机械结合在一起，这种机械结合可以承受拉力和压缩力以及力矩。断裂自然可以用机械键的顺序断裂来表示。对于给定的入射海浪幅度和周期，该模型提供了应力和微裂缝的空间分布和时间演化以及破片尺寸分布的信息。我们证明了断键比例α随着波幅的增加而增加。反之，L冰块的大小随着振幅的增大而减小。这一信息对于理解单个浮冰的破碎和浮冰碎片的大小很重要。
We present a discrete-element method (DEM) model to simulate the mechanical behavior of sea ice in response to ocean waves. The interaction of ocean waves and sea ice potentially can lead to the fracture and fragmentation of sea ice depending on the wave amplitude and period. The fracture behavior of sea ice explicitly is modeled by a DEM method where sea ice is modeled by densely packed spherical particles with finite sizes. These particles are bonded together at their contact points through mechanical bonds that can sustain both tensile and compressive forces and moments. Fracturing naturally can be represented by the sequential breaking of mechanical bonds. For a given amplitude and period of incident ocean waves, the model provides information for the spatial distribution and time evolution of stress and microfractures and the fragment size distribution. We demonstrate that the fraction of broken bonds α increases with increasing wave amplitude. In contrast, the ice fragment size l decreases with increasing amplitude. This information is important for the understanding of the breakup of individual ice floes and floe fragment size.