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中文摘要：
这份报纸在一个未经触动的冰封面下面为沉没的冰块建议批评条件变得不稳定，作为成功地预言冰拥挤形成或冰拥挤的任何数字模型的一个基本部件版本事件。试验性的斜槽模型和数字模拟方法两个都被使用分析沉没的冰块的稳定性。斜槽模型实验首先被进行，并且试验性的结果显示沉没的冰块的稳定性的影响因素包括相对长度，相对的水深度和相对宽度。沉没的冰块的稳定性上的相对宽度的效果很好没被学习，这被显示出。基于试验性的结果， k - 骚乱模型被使用建立为在沉没的冰下面学习压力分发的数字模型堵住的 3-D。液体流动测量器压力和前缘压力上的相对宽度的效果被评估。根据力量平衡方程和片刻平衡方程，最后，这份报纸为滑动和 underturning 建议一个计算公式沉没的冰块的批评条件，和结果在对试验性的结果的好同意。
英文摘要：
This paper proposes the critical conditions for a submerged ice block beneath an intact ice cover to become unstable,as a fundamental component of any numerical model to successfully predict the ice jam formation or the ice jam release events.The flume model experimental and numerical simulation methods are both applied to analyze the stability of submerged ice blocks.The flume model experiment is first conducted,and the experimental results indicate that the influencing factors of the stability of a submerged ice block include the relative length,the relative water depth and the relative width.It was shown that the effect of the relative width on the stability of submerged ice blocks was not well studied.Based on the experimental results,the k-eturbulence model is applied to establish a 3-D numerical model for studying the pressure distribution beneath submerged ice blocks.The effects of the relative width on the Venturi pressure and the leading edge pressure are evaluated.Finally,according to the force balance equation and the moment balance equation,this paper proposes a computational formula for the sliding and underturning critical conditions of submerged ice blocks,and the results are in good agreement with the experimental results.
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