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- Keywords polymer flooding rod pumping wells;power law fluid;sucker rod string;liquid friction force;longitudinal vibration;dynamometer card;simulation model; 聚合物驱抽油机井;幂律流体;抽油杆柱;液体摩擦力;纵向振动;示功图;仿真模型;
- liquid friction force 液体摩擦力
- As soon as sliding begins, it is found that the friction force decreases. 人们发现，滑动一开始，摩擦力就减
- The observed friction force is the force required to break these tiny welds. 我们观察到的摩擦力，就是破坏这些细微的焊接点所需要的力。
- In such a situation he would give anything for the sake of just a little friction force. 在这样的情况下，他会不惜任何代价来换取那怕只是一点儿摩擦力。
- It analyzed and proved in theory that at present there exist not only liquid friction but also solid one in gauge deni-erer. 从理论上分析和证实目前隔距式定纤感知器不仅存在液体摩擦,同时还存在固体摩擦。
- When the friction force acts alone, the total mechanical energy is not conserved. 当只有摩擦力作用时，总机械能就不守恒。
- This nonlinear change in friction force over a small change in velocity results in uncomfortable feeling when people hitchhike hydraulic lift. 该摩擦力的非线性改变使速度产生变化,导致人们在搭乘液压电梯时产生不舒适感。
- The friction force is therefore called a nonconservative or a dissipative force. 因此，摩擦力称为非保守力或耗散力。
- What effect does this have no the friction force between the opposing lineman's feet and the ground? 这对这名边线防守队员的脚与地面之间的摩擦力产生了怎样的影响？
- The friction force between Si3N4 probe of AFM with WS2 nanotube is lower than that with MoS2 powder. 在室温大气下干摩擦时原子力显微镜的S3iN4探针与WS2纳米管之间的摩擦系数小于与MoS2粉末的摩擦系数。
- The work of the friction force does depend on the path; the longer the path between two given points, the greater the work. 摩擦力的功则取决于路径，路径越长，功越大。
- In pneumatic proportional position control system, the friction force is a key factor affected the accuracy of its positioning. 摘要气动比例位置控制系统中，摩擦力是影响其定位精度的一个关键因素。
- Because of the ice and the snow, it has less frictional force. 再加上冰雪在减少磨擦力。
- This frictional force causes the velocity of an object to decrease. 这种摩擦力使物体的速度减低。
- The isolation of this damper is performed by the friction force caused by relative slip between plate layers under loading. 根据动力学原理,建立了阻尼器的振动系统模型及系统方程;
- The friction force is described by a hysteretic model, which is determined by the state of motion of the damper, i.e. stick or slip. 阻尼器摩擦力由黏滞模型描述，由接触面滑动或黏滞状态决定。
- If there are nonideal constraints in the system, such as a spring force or a friction force etc, they can be treated as a positive force. 若要求解约束反力，需解除相应的约束，代之以约束反力，并计入主动力。
- Flanged valves have following features : small opening stroke , small friction force when opening and shutting ,and high abrasion resistance . 本阀门结构为法兰连接，具有开启行程小、摩擦力小、耐磨等特点。
- The distribution of the friction force on the interface between soil and mortar and the variation of pretress in anchors are obtained through test. 通过试验，测试了锚固体在岩土中摩阻力的分布规律及其锚杆中的预应力变化，校验了锚杆的设计数据，为工程提供了设计依据。
