查询词典 friction

By making use of multi-points backward pressure of one dry gas well, this paper introduces how to confirm dynamic friction coefficient of downhole tubing at the exact moment through stable testing material, gives the productivity and the corresponding bottom hole pressure by using productivity equation, calculates wellhead pressure in combination with dynamic friction coefficient of tubing, establishes the correct wellhead outflow performance equation for this well, draws out wellhead outflow performance curve and discusses how wellhead outflow performance equation or wellhead outflow performance curve changes with the decrease of formation pressure or the change of wellhead outflow performance curve.

借助1口干气井的多点回压法试井资料，介绍了如何利用气井稳定试井资料，确定该气井此时此刻井下油管动态摩阻系数；利用产能方程给出产量和对应的井底压力，结合油管动态摩阻系数计算井口压力，建立该井准确的井口流出动态方程并编绘井口流出动态曲线；讨论了随着地层压力递减和井下油管动态摩阻系数变化规律，井口流出动态方程或井口流出动态曲线的变化规律。

The other type of friction has a kinetic coefficient of friction wh....

相对的，有些校舍在柱两侧配置适当的壁体，形成所谓翼墙柱。。。。

Viscosity lower coefficient of friction small, can effectively reduce the mechanical operation of friction, easy to clean.

粘度较低、摩擦系数小，能有效地减少机械运行的摩擦阻力，容易清洗。

The value of the stable friction coefficient is equal to the average value of the friction coefficient of matrix and reinforcement.

在摩擦试验的最初阶段，复合材料的摩擦系数随摩擦的进行而降低，并在一定的摩擦距离以后趋于稳定。

The results show that the friction coefficient of the steel in dry sliding friction decreases with increment of load and speed.

结果表明，摩擦系数是随着法向载荷和滑动速度的增加而降低。

Static coefficient of friction Surface roughness Dry friction

静摩擦因数；表面粗糙度；干摩擦

The correct answer is "when covered by a film of liquid sufficient to reduce the coefficient of static friction between the tire and the road to essentially zero, but not so deep as to introduce a new source of friction."

正确的答案是"当被覆盖上一层液体足以把轮胎和道路之间的静态摩擦系数减少到理论上的零值又不产生新的摩擦源"。

With increasing temperature of separate plate,shapes of friction torque became dissymmetrical,and dynamic and static coefficient of friction declined in this process.

以自制炭纤维增强纸基摩擦材料和45#钢为摩擦副，采用惯量试验方法研究了温度对摩擦副摩擦性能的影响。

Generally speaking, according to the GB 10006 (plastic film and slice method for determination of the coefficient of friction) and ASTM D1894 to film on the surface of dynamic and static coefficient of friction for forward and inverse.

凡是给根据GB 10006(塑料薄膜和薄片摩擦系数测定办法)和ASTM D1894来测定薄膜正反暗不天的不静静摩擦系数。

Experiments were performed with this device to measure the static coefficient of friction for three kinds of material(45steel,HT35-61,QT80-2) in the same processing method,the same surface texture,the same load,dry friction and different surface roughness conditions respectively.

分别对材料(45钢、HT35-61、QT80-2)在相同加工方法、相同表面纹理、载荷恒定、干摩擦条件下，改变表面粗糙度时的静摩擦因数进行了测定。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。