查询词典 friction coefficient

printed on thin paper, swayig press paper wheel pressure weaker have enough friction queriessent paper, the 400 g/m2 thick paper is not enough, however, friction will slip of paper, so as to produce.

末了得不入结论：印薄纸时，摆不静压纸轮不弛辛不沉一不背也有不足的摩擦辛送不入纸弛，而印400g/m2的厚纸时，摩擦辛不敷，纸弛不离会滑移，从而爆发迟滞本体。

The high and low frequency internal friction behavior was conducted on Sound Frequency and Multi-functional Internal Friction Apparatus.

采用多功能、声频内耗仪对材料的低高频内耗行为进行了测量。

Reasons:(1) If metal friction sound is the turbocharger rotor-bearing or thrust bearing wear too much, turbocharger impeller and shell friction generated.

原因： （1）如有金属摩擦声，是增压器转子轴承或止推轴承磨损过多，叶轮与增压器壳摩擦而产生。

A friction test equipment was developed and used in friction test.

研制了土壤与金属界面摩擦试验装置。

We use different coefficients such as bottom friction, bottom roughness and horizontal turbulent friction for the numerical test.

选用不同的海底摩擦系数、海底粗糙度系数以及水平湍流摩擦系数进行数值试验。

The most powerful tool of tribology study is experiment and all kinds of friction testing system is designed and manufactured for friction test.

但在这些摩擦试验系统上都无法实现摩擦速度实时改变的试验，为了验证摩擦速度变化对摩擦磨损情况的影响，同时也为了研究周期性波动摩擦速度变化下的摩擦材料性能和特点，从探讨非匀速摩擦磨损过程的构思出发，提出构建一种非匀速摩擦磨损试验装置。

Negative friction is always the top important problem in geological engineering, In order to calculate and study the negative friction, displacement coordinated method is improved and the relative displacement between the pile and soil is considered.

为了对负摩阻力进行计算研究，本文对传统的位移协调法进行了改进，考虑了桩土之间的相对位移，并结合土与结构材料接触面的固结快剪试验结果提出了桩土荷载的传递函数。

Experimental results indicate that the B/A value greatly affects the internal Nusselt number and friction factor of the twisted tube because the parameters decrease with the increase of B/A and S/d values, more rapidly with the former, and that the Nusselt number and friction factor of the twisted oblate tube increase respectively by 30%~150% and 20%~50%, as compared with those of the smooth tube at the same Reynolds number and Prandtl number.

实验结果表明：高扭曲比螺旋扁管的管内努塞尔数和阻力系数均随B/A值和S/d值的增大而减小，但随B/A值的增加而减小得更快，B/A值对高扭曲比螺旋扁管的管内传热与流阻性能影响更大；在相同雷诺数和普朗特数下，高扭曲比螺旋扁管管内的努塞尔数为光滑管的1.3~2.5倍；阻力系数为光滑管的1.2~1.5倍。

The pressure responses of polymer packaged fiber Bragg grating sensor are analyzed, a special kind of pressure-resistant polymer is used to coat FBG in a metal tube. A kind of soft elastic material is used to reduce the friction between tube and polymer, and to eliminate chirp effect caused by different friction distribution to improve the pressure response of FBG.

分析了聚合物封装光纤光栅的压力响应特性，通过采用特殊聚合物材料将光纤光栅封装于金属套管中，并通过在金属套管预涂覆一层软弹性材料，以消除封装过程中由于聚合物固化收缩以及聚合物与套管壁粘接与摩擦产生的光纤光栅啁啾化，改善了光纤光栅压力响应特性。

The experimental results indicate that, over a ranger of tube side Reynolds number and Prandtl number (Re=4000~20000, Pr=6~7.5), the internal Nusselt number and friction factor of spiral-flat tube increased by 30%-150% and 20%-50% respectively compared with smooth tube at the same Re and Pr. The value of friction factor decreases with increasing the value of B/A as well as increasing that of S/de, and the same phenomena can also be observed for Nusselt number.

实验结果表明：管内Nu和f值均随均随B/A值和S/de值的增大而减小，但随B/A值的增加而减小得更快，B/A值对螺旋扁管管内传热与流阻性能影响更大；在相同Re和Pr下，螺旋扁管管内Nu数为光滑管的1.3～2.5倍；阻力系数f是光滑管的1.2～1.5倍。

He tendered his resignation to the Prime Minister.

他向首相递了辞呈。不适合

International economy and trade,Nanking 210044

国际经济与贸易，南京 210044