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A dynamic solution of the shear band propagation in submerged landslides

机译：淹没滑坡中剪切带传播的动态解

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摘要

A failure mechanism of submarine landslides based on the phenomenon of shear band propagation has been investigated using the energy balance approach. Dynamic analysis includes inertia effects in the sliding layer and viscous resistance of the water, but ignores elastic and plastic wave propagation in the sliding layer. The resulting differential equation has been solved numerically. Analytical approximation of this numerical solution provides a convenient basis for the parametric and sensitivity studies. The solution allows assessing the velocity and acceleration of both the landslide and the shear band at the moment when the slide fails due to the limiting equilibrium (i.e., the initial post-failure velocity). The effects of the initial landslide velocity on the tsunami wave height are discussed and validated for a number of landslide examples.
机译：利用能量平衡方法研究了基于剪切带传播现象的海底滑坡破坏机理。动力学分析包括滑动层中的惯性效应和水的粘性阻力，但忽略了弹性和塑性波在滑动层中的传播。所得的微分方程已通过数值求解。该数值解的解析近似为参数和灵敏度研究提供了方便的基础。该解决方案可以在由于极限平衡而导致滑坡失效时评估滑坡和剪切带的速度和加速度（即初始破坏后的速度）。讨论了初始滑坡速度对海啸波高的影响，并通过许多滑坡实例进行了验证。

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