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friction layers
相关语句
  摩擦层
     On semi-metallic materials surfaces, two kinds of friction layers were also observed.
     在半金属摩擦材料的摩擦表面上也观测到两种结构的摩擦层:层Ⅰ和层Ⅱ,层Ⅰ是由钢棉的塑性变形铺展而成的摩擦层,层Ⅱ是由铁磨屑聚集而成的摩擦层
短句来源
  “friction layers”译为未确定词的双语例句
     the high temperature section concentrates in surface friction layers of brake discs,and the top temperature is 220 ℃;
     仿真结果表明:在制动开始阶段,制动盘迅速升温,高温区集中在制动盘摩擦面表层,最高温度达220℃;
短句来源
  相似匹配句对
     On Friction
     谈谈摩擦力
短句来源
     HARD WITH LOW-FRICTION COATING LAYERS FOR CUTTING TOOLS
     刀具的抗磨和减摩镀层
短句来源
     The friction and wear mechanism of the boride layers is too analyzed.
     同时对磨损机理进行了分析讨论。
短句来源
     5.friction;
     5 减阻 ;
短句来源
     Nutrition economics for layers
     产蛋鸡的营养经济问题
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  friction layers
Realistic brake friction models should not use bulk properties of the starting materials, but rather should incorporate the properties of the fine-grained friction layers.
      
Microstructure and detachment mechanism of friction layers on the surface of brake shoes
      
Formation of Friction Layers and Wear Resistance of Steels under Conditions of Boundary Friction
      
The use of a variety of friction layers at the rotor/stator interface was investigated.
      


The Austausch coefficient may be obtained by wind structure. 1902 Ekman established the wind spiral theory in the friction layer. From the observed wind spiral, we may calculate of the Austausch coefficient by this theory. 1952 considered effect of the change of pressure field with height; i. e. the thermal wind effect, and found excellent results. But, Formula holds only for the condition in the stationary current flow, or in the stationary temperature pressure field and uniform temperature pressure gradient.In...

The Austausch coefficient may be obtained by wind structure. 1902 Ekman established the wind spiral theory in the friction layer. From the observed wind spiral, we may calculate of the Austausch coefficient by this theory. 1952 considered effect of the change of pressure field with height; i. e. the thermal wind effect, and found excellent results. But, Formula holds only for the condition in the stationary current flow, or in the stationary temperature pressure field and uniform temperature pressure gradient.In this paper, we consider the unstationary effect, as calculating the Austausch coefficient in the friction layer, and obtain a more general formula. Under some special constrains, it tends to be the or Ekman's formula. Then, this formula may be more accurate in calculation and more wide in application.Some calculations based on observed data by using these three different formulas are presented and compared.

摩擦层中湍流系数,利用风标的分布,可以测定之。1902年,爱克曼创立了摩擦层中风标螺线,利用风标螺线,可以测定摩擦层中的湍流系数。1953年,莱赫特曼考虑了气压场随高度的变化,即热成风的因素,获得了良好的结果。但是,莱赫特曼公式之应用,只限定于恒态吹流,或恒态均匀温压场的条件之下,方能准确使用。这样是在一般情况之下难以满足的。关于摩擦层非恒态问题,1947年赵九章、裘碧克曾经讨论过。本文仅就非恒态湍流系数测定问题予以进一步探讨。并得到了较有广泛意义之公式。而莱赫特曼公式,系属温压场恒态,温压场中温度、压力梯度在均匀情况之下,该公式之特解。爱克曼范式,系属气压场稳定,温度梯度恒态为零时,该公式之特解。这样,该公式的计算,使得湍流系数测定工作精确化和广泛化。 最后,本文作了一些实际资料的计算与分析,和讨论在自然环境中湍流系数的变化。

A two-layer model both applicable to graphical integration and numericalcomputation is proposed.From this model the height of 500 mb surface andthe thickness between a certain selected isobaric surface in the vicinity of thetop of friction layer and 500 mb surface can be forecasted.An extended modelinvolving three layers is also designed.In designing them,no prescriptionwith regard to the distribution of vertical velocity is made.Finally,the steadiness of space mean velocity field and the selection...

A two-layer model both applicable to graphical integration and numericalcomputation is proposed.From this model the height of 500 mb surface andthe thickness between a certain selected isobaric surface in the vicinity of thetop of friction layer and 500 mb surface can be forecasted.An extended modelinvolving three layers is also designed.In designing them,no prescriptionwith regard to the distribution of vertical velocity is made.Finally,the steadiness of space mean velocity field and the selection oflateral boundary conditions are discussed.

在某些近似下,作者推导了一组闭合的预告500mb 高度和500mb 与某等压面之间的厚度的方程式;把它推广,作者还求出了一组预告三层等压面高度的方程式.和 Sawyer 等人~(**)的作法不同,在推导过程中,垂直速度随高度的分布未加以规定.这些方程式可以用电子计算机计算,也适合于图解计算,在业务工作中可以应用.在本文中作者还论证了空间平均场的準恒定性,并提出了选取边界条件的几种方法.

The equations which evolve the effect of friction are adopted. By using these equations, we analyse and discuss the movement of the large scale low-level jet stream axis. The methods, in which we can directly diagnose the movement of the jet stream in the weather map, are found. Meanwhile, it is found that both the thickness of friction layer and roughness play an important role in the movement of low-level jet stream.

本文采用了摩擦效应的运动方程,对大尺度低空急流轴线的移动予报进行了分析讨论,得出了适用于在天气图上直接可以诊断的一些方法,同时指出摩擦层厚度和粗糙度对低空急流轴线的移动起着重要作用。

 
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