查询词典 friction coefficient

The numerical results show that: the stress distribution on contact surface is relative to the relative velocity of sliding block and friction coefficient, and the maximum relative error of stress can be 100.08%. The non-linear Stribeck friction model can better describe the real situation of contact surface, because of the consideration of impact of the relative velocity to the friction.

研究结果表明：随着接触体相对速度的改变，摩擦因数相应变化，接触面上的应力与位移的分布随之改变，应力最大相对误差达100.08%；Stribeck模型考虑了速度对摩擦因数的影响，更能描述接触的真实情况。

The influence rules between the initial pressure,spring stiffness,oblique plane angle,friction coefficient of friction pair,friction force and the characteristics of draft gear were analyzed.

分析了缓冲器的初压力、弹簧刚度、斜面角度、摩擦副间的摩擦因数以及摩擦力对缓冲器工作性能的影响规律。

The effect of the tool composition on the friction and wear behavior was investigated,and the morphologies of the rake face and rear face of the tool cutting the steel in air and nitrogen were observed on a scanning electron microscope. It was found that the Al_2O_3/TiB_2 tool was dominated by adhesive and abrasive wear in low speed dry cutting; while in high speed dry cutting,the tool was characterized by oxidation wear. An oxide layer of TiO_2 was formed by way of the oxidation of the reinforcing agent TiB_2 at a very much high cutting temperature, which contributed to greatly reducing the friction coefficient and increasing the antiwear life of the tool.Such a friction-reducing and antiwear behavior of the oxide layer was enhanced with increasing content of TiB_2 in the tool composite. However,the tool showed a relatively poorer wear resistance in N_2 than in air, because N_2 acted to retard the oxidation of the TiB_2 and the formation of the oxide layer on the tool rake face.

结果表明：低速干切削时，Al2O3/TiB2陶瓷刀具的磨损机制主要表现为粘着磨损和磨料磨损；而在高速干切削时，刀具的磨损机制主要表现为氧化磨损，刀具表面经由氧化反应生成具有润滑作用的反应膜而起到固体润滑作用，从而使刀具的耐磨性能提高，随着TiB2含量和切削速度的增加，反应膜的减摩抗磨作用增强；而在切削区通入氮气时，由于刀具表面氧化膜形成受阻，刀具的抗磨能力有所降低。

Next, in ADAMS, friction coefficient database is set up, and dialog box for defining joint friction is extended based on analyzing joint friction in mechanical system, and the method of parametric analysis is discussed for analyzing manufacture errors influence on mechanism performance.

然后，建立了受电弓虚拟样机模型，基于该模型主要研究了运动副摩擦引起的升弓轨迹和升弓扭矩的运行误差；在ADAMS环境下建立受电弓的三维参数化模型，讨论了制造误差对受电弓升弓轨迹的影响。

Then, it used fiber friction coefficient analyzer to measure wool antidromic and direct friction coefficient.

同时，利用纤维摩擦因数测定仪测定羊毛纤维的顺逆摩擦因数，以确定改性后羊毛鳞片的去除情况。

Typically service brakes are concerned with dynamic coefficient of friction, or the coefficient of friction measured while the vehicle is moving.

典型工作条件下的刹车与动摩擦因数，即当车辆行驶时测出的摩擦因数有关。

Because of the small difference between the static friction coefficient and the dynamic friction coefficient of DF-5S slide, it avoids the squirming phenomenon in the restarting-up process efficiently and lowers the severe wear in the restarting-up process.

由于DF-5S铜基镶嵌滑块的动静摩擦系数的差值小，有效地避免了启动过程中的蠕动爬行现象的发生，降低了启动过程中的剧烈磨损。

At impacting condition, rigid polyarethane foam, rubber, and MDF concrete exhibited static friction coefficient of 0.29, 0.285, 0.28 - 0.29, and dynamic friction coefficient of 0.25,0.24, 0.23 respectively when running against aluminum lever.

在冲击加载条件下硬质聚氨酯泡沫塑料与铝杆之间的静摩擦系数为0.29，动摩擦系数为0.25；硅橡胶与铝杆之间的静摩擦系数为0.285，动摩擦系数为0.24；MDF水泥与铝合金杆之间的静摩擦系数为0.28～0.29，动摩擦系数约0.23。

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 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。

I hope that this success is just the first in a long series.

我希望这只是成功的开始。

Three dimensional stresses on the interface of tire and soil, tire deflection and soil sinkage are measured.

测试轮胎——沙土界面上的三向应力、轮胎变形和沙土沉陷；建立考虑剪切应力对沙土承载特性产生影响的车轮牵引性能预测模型；分析车轮作用下土壤的纵向稳定性。