摩擦

This dissertation systematically studies the principle of twist-roller friction drive, and builds an ultraprecision positioning system with long stroke using the twist-roller friction drive.

本学位论文系统地研究了扭轮摩擦传动系统的原理与实现技术，并研制了一台采用气浮导轨的大行程、高精度一维运动平台。

In addition, modern design and construction techniques help to significantly reduce consumption levels thanks to less friction and the best possible gear ratios.

此外，现代化的设计和施工技术有助于显着减少由于消费水平低摩擦和最佳的齿轮比。

In addition, the effect of sliding friction between gear teeth can not be neglected.

本文针对传统的船用齿轮在强度计算中不计船体变形及齿间摩擦力的问题，以沿船体纵向布置的渐开线料齿减速齿轮机构为研究对象，通过系统地分析、研究，推导出综合考虑船体变形及齿间摩擦的船用料齿轮齿面接触疲劳强度计算公式，以进一步完善船用齿轮的强度计算。

Based on elasticity theory, the friction phenomenon of gear meshing process was simulated by using general finite element software ANSYS.

基于弹性理论，借助通用有限元软件ANSYS模拟齿轮啮合过程的摩擦现象。

Its factors of structure,such as moment inertia,friction,gear clearance,will undoubtedly affect the functions of the system.

伺服系统中一些部件的机械参数，如转动惯量、摩擦、齿隙等都会对伺服系统的稳定性、稳定精度及动态性能指标产生重大影响。

The balls actually serve two purposes: first, they reduce friction and wear in the gear; second, they reduce slop in the gear.

这些钢球实际上有两个目的。其一，可以减少传动时的摩擦和磨损；其二，钢球可以减少转向盘的自由行程。

Based on the measurement of noise of an idling lathe C630,the effects of gear tooth friction on change gear noise ,and the relation between friction excitation frequency and gearing frequency were analyzed.

结果证明：齿面摩擦对齿轮振动的激励频率是啮合频率的2倍，可以利用适当的润滑有效地抑制齿轮噪声的高频成分。

At the same time, in the transmission system of construction machinery up-to-date, the power transferred by the transmission is improved greatly, while the gear friction is adopted in the transfer structure, so the heat loss will influence both the lubrication and cooling of the system, and the working intensity of the structure components. Therefore, the correction of the heat balance is necessary to the system.

同时，在现代工程机械的变速传动系统中，由于行星变速箱所传递的功率有了大幅的提高，但传递结构依然大量采用齿轮摩擦传动，其热损失不仅对系统的润滑和冷却有影响，而且对结构元件的工作强度也具有很大的影响，因此，也需要对该系统进行热平衡校核。

However, the influence both ship hull deformation and friction between gear teeth are omitted in strength calculation of gear driving fixed in boat in traditional design.

算例表明，船体变形及齿间摩擦时齿轮强度的影响的确不可忽视。

Heavy haul freight car; spring friction draft gear; impacting test; numerical simulation

重载货车；弹簧摩擦式缓冲器；冲击试验；数值仿真

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。