查询词典 static friction coefficient

The standard workpiece of the ring compression test by Lee and Altan will be used in this report. The specimen will first annealed to eliminate the internal stress and then through different ways of machining to produce different roughness of surface and different direction of machining marks. The ring compression test with various lubricants and dry friction were carried out at room temperature. The experiment results were drawn on the diagram of friction factor developed by Lee and Altan to compare the influence of the roughness of surface to plastic forming with or without lubricants.

实验将依Lee and Altan压环试验所用之标准压环试片进行，实验试片先经退火处理消除内应力，再将试片以各种不同之加工方式制作成具有不同的表面粗糙度，与不同刀痕方向之摩擦面，再於常温环境下实施乾摩擦与添加不同润滑剂之压环试验，将实验结果所得之数据绘制於Lee and Altan之定剪摩擦系数图中，以比较其不同表面粗糙度对塑性成形之影响，同时也说明在各种不同表面粗糙度下添加各种润滑剂对成形之影响。

During friction, the bondings between DDP and the surface of nanoaprticles break, as a result, the DDP and nanocore adsorb competitively and form a composite film on the friction surface.

在摩擦过程中，DDP和纳米微粒界面的键合断裂，DDP和纳米微粒在摩擦表面竞争吸附并形成复合边界润滑膜。

In this mode,l a grid- section model is introduced to determine the sectional tangent stiffness of reinforced concrete beam element and analyze its degeneration process, and three-node friction-sliding tendon elements are employed to analyze the friction and sliding of external tendons at deviators or sliding blocks.

引入分块截面模型确定钢筋混凝土梁单元截面的切线刚度和分析其退化过程，采用三节点摩擦滑移预应力筋单元分析体外预应力筋在转向块或滑块处的摩擦滑移效应。

The bearing is a kind of important part in the machine for supporting spindles. It is an urgent question for discussion to solve how to reduce the friction between bearings and shafts and how to improve the efficiency. Devisers have done many works to improve the performance of bearings, which include structure, lubricant, subtract friction material, and manufacturing process aspect.

轴承是机器中用来支撑轴的一种重要零件，如何减少轴承与轴之间的动摩擦，提高机械效率，一直是滑动轴承设计者所研究和迫切需要解决的课题，设计者们在轴承结构、润滑剂、减摩材料及制造加工工艺等方面进行了大量的改进工作。

ABSTRACT The bearing is a kind of important part in the machine for supporting spindles. It is an urgent question for discussion to solve how to reduce the friction between bearings and shafts and how to improve the efficiency. Devisers have done many works to improve the performance of bearings, which include structure, lubricant, subtract friction material, and manufacturing process aspect.

轴承是机器中用来支撑轴的一种重要零件，如何减少轴承与轴之间的动摩擦，提高机械效率，一直是滑动轴承设计者所研究和迫切需要解决的课题，设计者们在轴承结构、润滑剂、减摩材料及制造加工工艺等方面进行了大量的改进工作。

Analyses the seal mechanism of sleeve expansion joint and the defect of the current calculation formula of the friction force,presents new formula and illustrates the influence factors of friction force.

分析了套筒补偿器密封机理及目前所用的摩擦力计算公式的缺陷，给出了新的计算公式，并对影响摩擦力的因素进行了说明。

Carbon fiber medium copper graphite composites electrical dry friction friction and wear properties

碳纤维－中铜－石墨复合材料；通电干摩擦；摩擦磨损性能

The stretching influence on the near trusses should be considered when using the stretching-twice method, and the construction is hard to be controlled. The Harbin exhibition sports center with a 128m support span, attached to a deep design calculation of the super-large span prestress truss string structure, stretching once in tension bed method is brought forward for the bottom cable of the single truss string structure. From calculation research on the friction force between the tension bed and the truss string structure, the friction influence is considered for the displacement method of the middle of span, with the action of the fixed cable stress. This method, with vertical displacement of the middle of span as its main control target for prestress stretching, is successfully applied in the prestress stretching construction of the project.

二次张拉需考虑张拉对相邻桁架的影响，施工控制难度大，本文结合哈尔滨会展体育中心支座跨度128m的超大跨度预应力张弦桁架结构的深化设计计算，提出了单榀张弦桁架下弦拉索胎架一次张拉法施工方法，通过对张拉阶段胎架与张弦桁架间摩擦力的计算研究，定量索力下跨中位移法考虑摩擦力影响，以跨中竖向位移作为预应力张拉的主要控制指标，成功地完成了该工程预应力张拉施工。

First, the domestic and oversea research actualities of friction dynamic characteristics have been summaried, the manifestations and formings of these friction phenomena are discussed.

因此本课题基于摩擦实验研究，对摩擦特性进行分析，提出新的宏观经验模型结构，并给出相应的摩擦信号处理和参数识别过程，此外，运用数值方法对滑动导向系统的动力学特性进行了探讨。

The unique property about particle shells is that they have a larger difference in the friction in oil then on the backend of the lane. The friction of a reactive ball and a particle ball on the backend will not be very different.

微粒树脂的特性在於它在油区可以提供较大的摩擦力，至於在球道末端的乾板区，则和反应树脂的表现并没有什麼的差别。

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。