通过建立砂粒自锁条件及实测长石砂岩、石英砂岩与泵筒镀铬层或氮化层的滑动摩擦系数值， 证实了对柱塞拉伤失效原因的推测是正确的。
The deduction is confirmed by establishing self locking conditions and determining the sliding friction coefficients between sand and chromium plating layer and between sand and nitrided surface.
本文通过刚块动力模型试验，对具有光滑表面刚性块体的动、静摩擦系数关系进行了初步探讨，并以模型试验结果验证了离散元数值模型的正确性。
The relationship between static and dynamic friction coefficients of the rigid blocks with smooth surfaces has been studied preliminarily by means of a dynamic test of rigid blocks in this paper.
在传统的数值模拟工作中，底摩擦系数被当作一个常数或者在不同的海域取不同的常数。
In the traditional numerical simulation, the bottom friction coefficient has been treated as a constant or different constant in different region.
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