摩擦阻力

静压桩桩周摩擦阻力恢复值的利用及检测

Application And Check Of Recovery Of Friction Drag Around The Jacked Pile

吹吸扰动对壁湍流边界层摩擦阻力的影响

Effect of blowing and suction on friction drag of wall turbulent boundary layer

运用BP神经网络模拟算法和数理统计多元回归的方法对摩擦阻力系统进行模拟计算。

Application of BP neural network simulation algorithm and mathematical statistics method , multiple regression analysis of frictional system simulation .

最后通过ANSYS单元表操作，计算得到主减速器的摩擦阻力矩。

At last , through the operating of ANSYS ' element table , you will get the friction resistance torque of main reducing gear .

结果发现，附加摩擦阻力系数λz随弗劳德数Fr的增加而减小；

It has been found that the additonal friction factor λ z decreases with increasing Froude number Fr ;

分析了不同颗粒直径条件下摩擦阻力系数与等效雷诺数的关系，并通过实验数据拟和得到了渗透率K和惯性常数F。

The variation of friction factor with equivalent Reynolds number for the different particle diameters is presented . By fitting the experimental results the permeability K and inertia coefficient F was determined .

随着IPF的增大，二元冰的摩擦阻力变大。

When the IPF increases , the flow resistance of the ice slurry became larger .

摩擦阻力按1957年ITTC相关线计算。

The fric-tional resistance is calculated according to 1957 ITTC correlation line .

通过实验研究得出了N2泡沫压裂液在15~45MPa范围内摩擦阻力系数和广义雷诺数之间的计算关联式，其在本文实验工况下的平均计算误差为10.2%。

The relational expression between the frictional resistance factor and generalized Reynolds number is obtained by the experiments , and whose average calculation error is 10.2 % under the experimental condition .

可以得到，CFD计算在模型试验雷诺数下摩擦阻力是比较精确的，兴波阻力也可以得到较好的预报，但是在粘压阻力计算中还存在不足之处。

We can know that CFD method is rather accurate under model test Reynolds number , and the resistance of wave-making is also predicted well , but the calculation of viscous resistance is a little shortage .

气体流动基本方程与Colebrook-White摩擦阻力公式的综合应用

Integrated application of general gas flow equation and Colebrook-White friction factor expression

胶束体系减阻率随广义雷诺数ReM的增大而增大；并获得了摩擦阻力系数与广义雷诺数ReM的变化关系。

The drag reduction percentage for these micelles increased with the increase of Generalized Reynolds number ( ReM ) . The relationship between Fanning friction factor and generalized Reynolds number was obtained .

结果表明，FLUENT可以较准确的预报船体摩擦阻力，而总阻力则需要更精确的模型及参数控制才能较好的预报。

The numerical calculation results indicated that Fluent can exactly predict the friction resistance of a ship hull ; but the total drag must be need use more precise model and control parameters to get a good result .

在转盘钻井时，BHA控制井斜与方位是由近钻头稳定器与井壁的接触方位角、接触反力及摩擦阻力综合作用的结果；

In rotary drilling , the control inclination and azimuth is the result that the contact angle , force and resistance act as between the near stablizer and hole wall .

分析比较了翅片长度、翅片间距、翅片高度对其传热和阻力性能的影响，其中翅片长度和翅片间距对无量纲传热j因子和摩擦阻力f因子影响较大，翅片高度影响较小。

Influence of the fin length , pitch and height on heat transfer and flow resistance characteristic was compared and analyzed , in which both fin length and pitch have a strong influence on factors j and f , while fin height effects slightly .

忽略风力和流力的作用，水平波浪力和波浪力矩采取线性化的Morison方程来计算，垂向计算摩擦阻力和Morison力的垂向分量（纵摇时）。

Wind and current loads are neglected . Horizontal wave force and the wave moment are calculated by Morison equation . Vertical forces are composed by frictions and the perpendicular component of Morison force .

计算了起沸点和净蒸气产生点：为两相段摩擦阻力放大倍数的计算选择了Friedel方法，并根据实验结果对其进行了合理地修正；

ONB and FDB were calculated ; the Friedel method was selected to compute the two-phase frictional resistance and it was reasonably corrected on the basis of the experimental results ;

三，采用基于Noblesse新细长船理论的方法，对兴波阻力进行理论分析，并编制相应的程序，然后应用ITTC方法计算摩擦阻力，从而对船舶阻力作出预报；

Employ the method based on Noblesse new slender ship theory , analyze wave making resistance , and calculate the frictional resistance by ITTC method , to predict the resistance ;

通过水平管内四丁基溴化铵（TBAB）水合物浆（CHS）的流动实验，对水合物浆的流变性和摩擦阻力特性进行了研究。

The rheology and pressure drop of Tetra-n-Butyl Ammonium Bromide ( TBAB ) Clathrate Hydrate Slurry ( CHS ) in horizontal pipe flow was investigated through a series of experiments . The TBAB CHS with different volume fraction of solid ((?)

提出用高精度的反映密度、黏度和温度关系的经验公式和Colebrook公式计算风管摩擦阻力系数的方法。

Puts forward the calculation method of air duct frictional resistance based on the Colebrook formula and a high accuracy empirical formula reflecting the relation between air density and viscosity and air temperature .

本文沿用Barth稀相气力输送理论，在试验基础上，得到在水平管内作密相气力输送时，砂粒在各种工艺参数下的附加摩擦阻力系数的经验关联式。

Based on the experiments and along with Barth 's dilute pneumatic conveying theory , several empirical equations for calculating the additional friction factor are obtained with the various technological parameters in the dense phase pneumatic conveying system with a horizontal pipe .

实验结果表明，在试验条件下，速度约为0.04m／s时，和光滑表面试样相比非光滑表面试样土壤摩擦阻力可减小4-6%。

The experimental data was fitted to obtain the mathematical models of soil frictional resistances . The results showed that the frictional resistance could be reduced 4-6 % , at 0.04m/s speed , by bionic concave-unsmooth surfaces compared with smooth sample under test condition .

用载荷系数法求回转支承装置的摩擦阻力矩

Determination of friction torque in slew ring with load factor method

单桩侧摩擦阻力曲线的推求与拟合

The side skin friction curves ascertainment and imitation of single pile

应用能谱方法计算两相流动摩擦阻力

Using the energy spectrum method to calculate the two-phase frictional resistance

土摩擦阻力对预应力筏板基础作用效应分析

Synthetic Analysis of Soil Restraint by Prestressed Concrete Raft Foundation Reaction

板坯连铸机结晶器铜板与铸坯摩擦阻力的测试与分析

Testing and analysis of frictional resistance between mould plates and slab

大粗糙度横肋管摩擦阻力与传热特性

Friction and heat transfer characteristics of transverse tube with large roughness

土工格栅与膨胀土界面摩擦阻力系数试验研究

Experiment on Interface Friction Coefficient Parameters between Geogrids and Expansive Soil

夹片与锚环摩擦阻力损失的分析

Analysis of the loss for friction resistance between wedge and anchor-ring