13 Elastic Wave Propagation Modeling During Exploratory Drilling …
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a
b
Fig. 13.7 Distribution under static load impact of: a pressure, b the Mises stresses
a
b
Fig. 13.8 Stress propagation by side impact: a—the initial moment of collision, b—the stated
elastic wavefront propagating through ice island
13.4.4 The Modeling of Collision of Ice Island with Ice Layer
The collision of ice island with drifting ice layer modeled as impact of external force
on side of ice island. The process of stress propagation is represented in Fig. 13.8.
The maximum stress values are reached the collision site and propagate in the
form of shear vibrations along the upper boundary of the ice island. In the case of
strong collisions in these areas, the destruction is possible.
13.5 Conclusions
The approach based on grid-characteristic method allows to model of ice island
stability problems. We simulated the drill impact, impact of earthquakes, exposure
to static load, and side impact on an ice island drifting ice floes. The approach helps
to estimate influence of different impacts on ice island and determine their critical