1) friction velocity
摩擦速度,剪应力速度
2) friction velocity
摩擦速度
1.
Abrasion property was mainly investigated for the particulates reinforced metal matrix composites(PR MMCs) under different friction velocity.
研究了颗粒增强铁基复合材料(PRMMCs)在不同摩擦速度下的性能。
2.
The threshold friction velocity of oasis surface is greater than that of Gobi surface at natural condition, and the vertical dust flux of oasis surface is nearly 10 times smaller than that of Gobi surface because of the difference of the land-surface characteristics such as particle size distribution, plant vegetation and surface soil moisture content and so on, but whe.
研究表明,在自然状态下,由于地表土壤的粒子尺度分布特征、植被覆盖度及地表土壤水分含量等下垫面特征不同,绿洲地表风蚀起沙的临界摩擦速度要大于戈壁地表,其垂直尘粒通量(风蚀起沙率)比戈壁地表小将近一个数量级;但考虑人为的翻耕作用时,绿洲地表风蚀起沙的临界摩擦速度可能会减小一半以上,其垂直尘粒通量也将增加大约一个数量级,甚至比戈壁地表还要大。
3.
The results show that,compared with the fraction velocities directly measured by eddy-covariance method in different wind-sea/swell regimes,all parameterization schemes estimate friction velocity in pure wind sea regime better than those in both crossing swell and counter swell regimes.
利用前人给出的表面波浪动力试验中的部分观测资料,通过六种不同的湍流通量参数化方案,分别计算了不同海面波浪状况所对应的摩擦速度。
3) frictional velocity
摩擦速度
1.
In the context of field observations at Shentou (112°17′ E, 39°18′ S) in September～October 1988, calculation is carried out of frictional velocity, characteristic temperature and turbulent momentum flux, with turbulent heat flux dealt with by two methods.
利用山西省神头（１１２°１７′Ｅ，３９°１８′Ｎ）１９８８年９～１０月间采集的大气野外测试资料，计算了摩擦速度、特征温度、湍流动量通量。
4) sliding speed
摩擦速度
1.
The friction and wear behavior of CuTeSeFe alloy as well as the effects of load and sliding speed on the friction and wear properties of the alloy under dry sliding conditions were investigated by ring-disc friction and wear tester.
利用环-盘式摩擦磨损试验机研究了铜碲硒铁合金的干摩擦磨损行为,分析了载荷和摩擦速度等参数对该合金摩擦磨损性能的影响,并用扫描电子显微镜对磨损形貌进行了观察。
5) threshold friction velocity
临界摩擦速度
1.
The threshold friction velocity of oasis surface is greater than that of Gobi surface at natural condition, and the vertical dust flux of oasis surface is nearly 10 times smaller than that of Gobi surface because of the difference of the land-surface characteristics such as particle size distribution, plant vegetation and surface soil moisture content and so on, but whe.
研究表明,在自然状态下,由于地表土壤的粒子尺度分布特征、植被覆盖度及地表土壤水分含量等下垫面特征不同,绿洲地表风蚀起沙的临界摩擦速度要大于戈壁地表,其垂直尘粒通量(风蚀起沙率)比戈壁地表小将近一个数量级;但考虑人为的翻耕作用时,绿洲地表风蚀起沙的临界摩擦速度可能会减小一半以上,其垂直尘粒通量也将增加大约一个数量级,甚至比戈壁地表还要大。
2.
The dust particle concentration data measured by Wide Range Particle Spectrometer and the data observed at a 20 m meteorological tower were used to calculate the dust emission rate,friction velocity and threshold friction velocity over Zhurihe area,Inner Mongolia.
通过宽范围颗粒谱仪WPS以及20 m梯度塔获得的观测资料,计算了朱日和地区沙尘天气下的起沙通量、摩擦速度以及临界摩擦速度,得到以下结论:①起沙通量大小与沙尘天气的强度呈一定的相关关系,随着沙尘天气强度的增大,起沙通量大小也增大。
6) relative friction speed
相对摩擦速度
1.
To improve the quality of friction weldingjoints of engine turbocompressor rotors, we analyzed theproperties, microstructure, fracture surface and elementdistribution of K418+42CrMo friction welding joints ondifferent relative friction speeds.
为提高发动机涡轮转子摩擦焊接的质量,对不同相对摩擦速度下K418+42CrMo摩擦焊接接头性能、金相组织、拉伸断口及元素成分进行了分析。
补充资料：摩擦学:滚动摩擦
滚动摩擦
两相互接触的物体有相对滚动或有相对滚动趋势时的摩擦。滚动摩擦的机理不同於滑动摩擦﹐它主要来源於滚动体在接触区域產生弹-塑性变形﹐在以接触点(或线)为中心的接触区内接触压力分布不对称﹐致使支承面的反力N 发生偏心﹐并產生摩擦力F (见图 滚动摩擦示意图
)。用表示法向反力N 到接触点的距离﹐根据力的平衡条件可得
式中为滚动体半径﹔为滚动摩擦係数﹐它的量纲为长度﹐其值与接触面的材料﹑粗糙度﹑温度和湿度等因素有关。
两相互接触的物体有相对滚动或有相对滚动趋势时的摩擦。滚动摩擦的机理不同於滑动摩擦﹐它主要来源於滚动体在接触区域產生弹-塑性变形﹐在以接触点(或线)为中心的接触区内接触压力分布不对称﹐致使支承面的反力N 发生偏心﹐并產生摩擦力F (见图 滚动摩擦示意图
)。用表示法向反力N 到接触点的距离﹐根据力的平衡条件可得 式中为滚动体半径﹔为滚动摩擦係数﹐它的量纲为长度﹐其值与接触面的材料﹑粗糙度﹑温度和湿度等因素有关。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条