查询词典 threshold friction

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。

The different friction coefficient between tube and die is one of the important influences in tube hydroforming. Reduce the friction as possible, it can not only benefit to tube forming, but also reduce axial force effectively.

不同的管坯和模具之间的摩擦系数也是影响管坯成形的重要影响因素之一，要尽量减少摩擦，不仅有利于管坯的成形，还能有效地减小轴向力。

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。

According to experiment study of anti corrosive-wear capability about tube and rod friction pair which are made of ordinary materials and surface treatments,some straight figures were drawn about selecting friction pair's corrosive-wear ratio.

对抽油井常用管杆材料以及表面处理后的管杆材料摩擦副耐磨蚀性能进行了试验研究，结果表明：J55与N80普通油管与QT60接箍配合时，接箍磨蚀最小；而无论与哪种接箍对磨，涂层油管最耐磨，并且与非调质钢(FG20)接箍磨蚀时，接箍最耐磨。

Possible cause is that top roller bearing failure "" flufenoxuron, cots from being subjected to excessive friction, or other mechanical reasons, such as inking rollers rupture Peel, with water in chrome-plated iron roller surface is "" Burr "" Peel, and so on, may cause abnormal COTS bear "" friction cause unexpected damage cot.

不定的来因是胶辊轴承生效&卡活&，胶辊秉承超度磨擦而毁坏，或是其它板滞上的来因，如串不朱软辊分裂起皮，带火镀铬铁辊暗不天有&毛刺&，&起皮&等，城市使胶辊秉承&否变态&磨擦造不败胶辊的否预期毁坏。

In order to improve the accuracy of the existing transformation ratio model of the hydraulic transformer, a mathematical model is established by introducing the friction coefficient, the viscous drag friction coefficient and the laminar leakage coefficient.

为解决已有的液压变压器变压比模型与实际结果偏差较大的问题，通过对实际工作过程中不应忽略的摩擦与泄漏损失进行研究，引入机械摩擦损失系数、黏性摩擦损失系数和层流泄漏系数，建立了液压变压器变压比模型。

By experiments,three sources of the antilock friction moment and the static antilock friction performance on the Fe-based SMA locknut were tested separately,as a result the feasibility of the new-type nut was proved.

通过试验对铁基SMA螺母防松摩擦力矩的三个来源和静态防松性能分别进行了测定，从试验的角度证明了这种螺母的防松性能。

Since the last century, with the industrial and technological development in the theoretical study of friction further to the mid-century, the birth of a new adhesion of friction.

自上个世纪，随着工业和技术的发展，在理论学习中的摩擦，进一步向本世纪中叶，诞生了一个新的粘附摩擦。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

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