查询词典 rolling friction

The contact area ratio of the asperities between the gap decreasing while the rolling speed increasing results in decreasing of the shear stress between the gap and positive damping of friction.

由辊缝动力学分析发现，随着轧制速度的提高，辊缝间粗糙微峰的接触区域比减小，导致辊缝间的剪切应力降低，由此产生的摩擦正阻尼降低。

Wheel/rail friction,rolling contact,temperature,creepage,finite element method

中文关键词：轮轨摩擦；滚动接触；温度；蠕滑率；有限元

In the analysis, firstly, the flux boundary condition is used to simulate the frictional heat resource between wheel and rail. The non-steady heat transfer between the contacting surfaces of the wheel/rail, heat-convection and radiation between the wheel/rail and the ambient were all taken into consideration. Therefore, a heat coupling model of the wheel/rail in rolling/sliding is put forward to calculate the frictional temperature rise in the wheel and rail. Secondly, after the temperature distribution of wheel/rail, due to friction, is calculated, substitute the thermal load with equivalent fictitious body force and boundary distributed force loaded on the nodes of the corresponding elements. The wheel-load is applied to the center of the wheel.

首先，用热流边界条件模拟轮轨接触界面的摩擦热源，考虑轮轨间的非稳态热传导、轮轨自由表面与环境的热对流、热辐射的影响，建立轮轨滚动接触热耦合有限元计算模型，分析计算轮轨滚、滑工况下的摩擦温升；其次，以求得的轮轨温度场结果作为求解轮轨应力场的已知条件，轮载以集中力形式直接加载于轮心处，将摩擦温升引起的热载荷等效为假想体力和热边界面力，施加于相应的单元节点上，建立了轮轨热—机械载荷耦合作用的热弹性平面应力模型，分析热—机械载荷作用下的轮轨应力场。

We all know that roller, block between hobber and hobber for the imprint, but the artificial division between rolling roller, block roller and embossing roll is a compact, linear three-roll and is consistent, so when the pressure is too large, due to the printing plate is compressed with the roller between a certain amount of sliding friction, thereby allowing the printing plate abrasive.

不小家都懂得，网纹辊、印版滚与不抬印滚之间虽说是滚不抬，但是网纹辊、印版辊与不抬印辊是有不抬缩的，而不一辊的线速量又是分歧的，所以当不弛力过不小时，由于印版被不抬缩会与网纹辊之间爆发必定的滑动摩擦，从而使印版爆发磨损。

Secondly, half axle differential to transfer power on both sides at the same time, allowing both sides Semiaxle a different speed rotation, as far as possible to meet the wheels on both sides of pure rolling in the form of isometric for not moving to reduce tire friction with the ground.

二是差速器向两边半轴传递动力的同时，允许两边半轴以不同的转速旋转，满足两边车轮尽可能以纯滚动的形式作不等距行驶，减少轮胎与地面的摩擦。

The neural networks correction method combining the local map with radial based function networks and the global map with linear transform was applied to calculate the deformation resistance of the strip and the friction coefficient in the rolling deforming region.

采用径向基函数的局部映射和全局线性映射相结合的神经网络校正模型求解带钢变形抗力和轧制变形区的摩擦因数；并采用轧制变形区离散化方法分析轧制变形区内张力、摩擦力及金属变形抗力等在带钢轧制方向上的分布规律，从而建立轧制力在线计算数学模型。

It was indicated that enhancing the friction between the material and the rotary kiln wall is easy to carry out the rolling motion from the aspect of force moment .

本文从力矩的角度出发，得出了要实现物料的滚落状态，可以提高物料与窑壁间的摩擦系数，并提出了具体方法。

The shapes of the melting solid surface may be concave, convex or plane, while the perimeter of plane contact regions may be rectangular, circular, elliptical, parabolic and arc curve. The types of relative motion reviewed here are the movement of a solid PCM melting inside a heated capsule, the movement of a hot body through a melting solid medium, slide contact and rolling contact. The contact melting may be caused by temperature difference, pressure difference, friction and viscous heating. Finally, the research regions in the future are summarized.

内容包括各种形式的接触熔化，可归纳为：在接触形状上可以有凹、凸与平的面，而接触的周长可以是矩形、圆形、椭圆形、抛物线形与弧形曲线；相对运动的类型有固体相变材料在加热容器内熔化，加热体通过熔化固体介质的运动，滑动接触与滚、转动接触；引起接触熔化的原因有温差、压力差、摩擦与粘性热。

Owing to their favourable rolling conditions and low friction, cylindrical roller bearings with cage are suitable for high speeds.

由于它们的良好的滚动状况和低摩擦，带保持架的圆柱滚子轴承适合高速运转。

Friction causes a rolling ball to stop finally.

摩擦力使得一只滚动的球最终停了下来。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。