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.
研究发现稳态摩擦系数的数值依赖于介质性质和实验条件。
It was found that the value of steady friction coefficient was depended on the fluidic medium property and experimental conditions.
研究了埋头弹火炮弹带挤进时的流动应力和摩擦系数，针对其特殊结构数值计算了挤进阻力，分析了挤进过程对内弹道性能的影响。
The stress and the friction coefficient of band during the engraving process were researched, and the resistance of this special structure was calculated.
通过数值模拟得到管壁的最大减薄和增厚部位，并讨论了芯轴的摩擦系数和钢管末端的压力对管壁厚度变化的影响。
The influences of friction coefficient between tube and mandrels and the press force on the end of tube for thickness chang...
通过数值模拟得到管壁的最大减薄和增厚部位，并讨论了芯轴的摩擦系数和钢管末端的压力对管壁厚度变化的影响。
The influences of friction coefficient between tube and mandrels and the press force on the end of tube for thickness chang...
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