动摩擦

The influence of with or without longitudinal joint, with or without initial opening, with or without filling in the joints and different friction factor in the joint face and so on are studied on the seismic response of Fengman Dam. Thus the conclusions for gravity dams with longitudinal joints is drawn.

对于丰满重力坝，本文考虑了有、无纵缝，纵缝有、无宽度，纵缝有、无填充物及缝面的不同摩擦系数等情况，进行了静动组合的地震反应分析，对存在纵缝的重力坝的抗震特性得出了一系列规律性的认识。

A mixed iterative method for 3-D frictional contact problems is proposed based on a combination of the iterative method and the fixed point method.

利用迭代法与不动点算法相结合给出了三维摩擦接触问题的一种混合迭代算法，克服了三维问题在接触面上因有无穷多个可能的滑动状态而无法确定带来的困难。

The transmission case is used to change the speeds of rotary disd and elevator, it consists of friction clutch, shift gear and transfer gear.

变速箱的用途是改变转盘、升降机的转速，它包括摩擦离合器、变速机构和分动机构。

The dynamic coupling drive, no friction and collision sounds.

盘动联轴器，无摩擦及碰撞声音。

Dynamic coupling drive, no friction and impact sound.

盘动联轴器，深井泵无摩擦及碰撞声音。

The nonlinearities, uncertainties and unknown disturbances, such as second-hand DC motors, vibration effect, variable friction, gear backlash, stick-and-slip and self-made driving circuits, of the proposed platform affect the dynamic behavior very much.

本文提出一神经模糊动模式控制架构并应用於小台控制系统。这个实验平台的非线性、确定性及未知干扰，如：二手的直马达、振动效应、变动的摩擦、齿间隙、平顺运转及自制驱动电，严重影响系统的动态为。

"Kinetic friction arises between surfaces in relative motion, static friction acts between surfaces at rest with respect to each other"

动摩擦力存在于相对运动之表面间，静摩擦则存在于静止的表面间，。

Then we summarize three basic mathematical-mechanical models of granular flow dynamics: kinetic theory model, friction-plasticity model and discrete element simulation model.

首先叙述了颗粒流研究的背景和基本概念，接着概述了颗粒流动力学研究的三种基本数学力学模型：颗粒动理论模型、摩擦塑性模型和离散元模拟模型。

Joint friction and micromotion should inevitably form the biofilm and debris around the prosthesis, which will provide a breeding ground for the propagation of pathogenic microorganisms. On the contrary, the destruction of bone around the joint caused by infection is one of the reasons of joint sinking.

在一定条件下，术后关节感染与假体松动又是相互促进的，关节的摩擦和微动，必然会在假体周围形成界膜和微粒，这就为病原微生物的繁殖提供了条件；反之，关节周围的感染所造成的骨破坏，也是关节松动下沉的一个原因。

In order to reduce friction, the moving parts of a machine are often oiled.

为了减少摩擦，机器的可动部件常常涂上润滑油。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。