助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   drag forces 的翻译结果: 查询用时:0.076秒
图标索引 在分类学科中查询
所有学科
地球物理学
水利水电工程
海洋学
更多类别查询

图标索引 历史查询
 

drag forces
相关语句
  拖曳力
     From the following four aspects: drag forces, velocity, energy and sediment carrying capability of slope surface flow, the threshold gradient of slope surface erosion in the granite area in the south of china is discussed, and it is obtained the critical slope gradient is from 35 to 43 degree.
     从坡面流拖曳力、流速、能量及挟沙力4 个方面,分析了南方花岗岩地区坡面侵蚀临界坡度,得出其临界坡度为35~43°
短句来源
     The Linearization of Drag Forces and the Error Estimation of Linear Force Spectra
     拖曳力的线性化及力谱误差
短句来源
     And the nonlinear drag forces in the Morion's formula are linearized iteratively with Borgman's assumption as the initial approximation.
     由广义Morison公式引入的拖曳力中的速度非线性项亦通过逐次迭代予以线性化。
短句来源
     Genetic Algorithm-Finite Element Inversion of Topographic Spreading Forces and Drag Forces of Lower Crust to Upper Crust in Tibetan Plateau
     青藏高原地形扩展力以及下地壳对上地壳的拖曳力的遗传有限单元法反演
短句来源
     In the dissertation, the drag forces acting on the square-section cylinder are surveyed in the flume, and attention is pay to the two factors:(1) The effect of cylinder shape to the drag force.
     (1) 块体形状对拖曳力的影响。
短句来源
更多       
  波浪阻力
     Spectral Analysis of Nonlinear Random Drag Forces
     非线性随机波浪阻力谱特性研究
短句来源
     The result indicates that calculated wave drag forces by the commonly used linerarization method are more than 5 % less than the nonlinear values measured by the mean square errors.
     结果表明,运用现在常用的线性化公式计算的波浪阻力比实际的非线性波浪力偏小。 其均方误差大于5%。
短句来源
     The spectral properties of nonlinear random drag forces on circular cylinders of random waves are studied by means of nonlinear spectral analysis.
     应用非线性谱分析理论,对非线性随机波浪阻力谱特性进行分析。
短句来源
     The results indicate that the wave drag forces calculated by linear wave theory are larger than those calculated by the third order Stokes wave theory for given waves.
     波浪阻力计算取决于海水质点的速度,而速度计算又依赖于所采用的波浪理论。
短句来源
     Therefore, the nonlinear effect of wave drag forces should be taken into consideration in design and application of important offshore structures.
     因此,对于重要的海洋结构物,应当考虑随机波浪阻力的非线性特性。
短句来源
  “drag forces”译为未确定词的双语例句
     Under the condition of giving a series of initial frictional resistant coefficients of soil around the pile, the loads of pile cap, the drag forces of pile end and the frictional resistances of soil around the pile are calculated by using the method of iteration.
     将桩体复合地基划分为若干土单元和桩身单元,在桩土接触面设置双曲线弹簧, 在给定一组初始桩侧摩阻力系数的条件下,运用迭代运算,计算得到刚性基础下桩体复合地基中板底荷载、桩顶荷载、桩底阻力和桩侧摩阻力。
     However, further work is required to clarify whether both the coupling relationship and the calculation of drag forces based on the two-fluid model are acceptable.
     而基于双流体模型建立相间耦合关系及进行颗粒曳力计算的正确性尚需进一步研究。
短句来源
     The IPSA model solves the Navier-Stokes equations of each phase with the interphase interactions between two phases of water and air, including the interphase drag forces, interphase lift forces, interphase pressure and virtual mass forces.
     IPSA模型对每一相求解N-S方程,并考虑水-气体两相间的相间相互作用,包括相间阻力、相间升力、相间压力和虚质量力。
短句来源
     A blunt body moving in a fluid is acted upon by drag forces and Karman vortex will appear behind it when the Re number is large enough.
     物体在流体中运动时会受到阻力 ,当Re足够大时 ,尾部还会产生Karman涡街。
短句来源
     Different coupling relations between phases and way of calculating drag forces used to simulate gas-solid fluidized beds, are based on the simplified hard-sphere model.
     在气固两相流多尺度模拟的确定性颗粒轨道模型中,相间耦合关系及颗粒曳力计算对模拟结果具有举足轻重的影响。
短句来源
更多       
查询“drag forces”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  drag forces
Both surface tension and fluid drag forces are considered in formulating the penetration behavior of ceramic particulates.
      
Analytical estimates, assuming the assembly to be a solid sphere of equivalent surface area, predicted drag forces about two orders of magnitude lower than the corresponding experimental values.
      
Measurement and computation of drag forces in thermogravimetric studies
      
From the model, it was clear that the lateral lift force is responsible for plume spreading, whereas lateral drag forces bend the plume.
      
This balance included the buoyancy and the viscous drag forces.
      
更多          


Taking consideration of the feedback on the vertical motion due to the drag force and the cooling effect acted on the air by raindrops, a system of differential, equations for the vertical velocity, temperature difference between cloud and environment and the water content is introduced. The solutions are. analysed numerically, for five sets of different, parameters. , From the. analysis the effect of different intensity of precipitation, stratification, initial condition and environment are studied, and...

Taking consideration of the feedback on the vertical motion due to the drag force and the cooling effect acted on the air by raindrops, a system of differential, equations for the vertical velocity, temperature difference between cloud and environment and the water content is introduced. The solutions are. analysed numerically, for five sets of different, parameters. , From the. analysis the effect of different intensity of precipitation, stratification, initial condition and environment are studied, and it is further found that under the influence of precipitation process, the vertical velocity, temperature difference and water content in cloud are reduced very quickly, and the descending motion appeas rapidly first at the cloud base, then spreads upward. Thus, starting from the cloud base, the cloud dissipates rapidly. This resembles the observed process of the dissipation of a precipitating cloud.

本文考虑了降水过程中水滴对空气的拖带作用和降温作用,并考虑到含水量变化时,由于水滴对空气拖带力的变化,而对垂直运动产生的反馈影响,导出了局地积云的运动方程、热力方程和含水量方程,并由此研究在降水过程中云中空气垂直运动、云内外温差和含水量结构的变化。计算结果指出,局地积云在降水过程的影响下,云中空气的垂直运动、云内外温差和含水量都要明显变小,并且很快地由下向上逐渐出现下沉运动,云也由下向上逐渐消散。计算结果与实际观测现象是基本相似的。本文共做了五个不同条件的个例数值计算,并由此分析比较了不同降水强度、不同稳定度、不同云中初始条件和不同云外环境所起的不同作用。

It is difficult to consider the exact dynamic effect of irregular waves on an isolated pile by spectral method if the drag force has to be taken into co- sideration, because the drag force is nonlinear according to Morison's Equa- tion. In order to overcome this difficulty, a more practical and effective method of wave simulation is introduccd in this paper. The characteristic of the wave forces obtained through simulation is analysed and discussed. Moreover,the application of the method of...

It is difficult to consider the exact dynamic effect of irregular waves on an isolated pile by spectral method if the drag force has to be taken into co- sideration, because the drag force is nonlinear according to Morison's Equa- tion. In order to overcome this difficulty, a more practical and effective method of wave simulation is introduccd in this paper. The characteristic of the wave forces obtained through simulation is analysed and discussed. Moreover,the application of the method of probability distribution for this case is also discussed.the four methods of computation are analysed and com- pared by means of four illustrative examples having different pile diameters.

按莫里逊方程计算孤立桩柱上的波浪力时,因其速度力是非线性的,当它需要考 虑时,难于用谱法确切地考虑不规则波浪的动力作用。为克服此种困难,本文介绍了 一种比较实用有效的计算方法──波浪数值模拟法。同时探讨了概率分布法对这种情 况的应用,并通过四个不同桩径的算例,对各种计算方法进行了分析比较。

This paper deals with the preliminary experimental study of drag reduction by adding minute quantity of polyacrylamide, a water-soluble longchain high molecular polymer, into tube flow of clear water and muddy water. Tests were performed in two tubes of inside diameters of 0.682 and 0.798 cm respectively. The mean grain diameters d_(50) of suspended sediment are 0.0052 and 0.0185 mm respectively. The consistency of polymer in the flow is 5-100 ppm. Data measured from tests in clear water agrees with von...

This paper deals with the preliminary experimental study of drag reduction by adding minute quantity of polyacrylamide, a water-soluble longchain high molecular polymer, into tube flow of clear water and muddy water. Tests were performed in two tubes of inside diameters of 0.682 and 0.798 cm respectively. The mean grain diameters d_(50) of suspended sediment are 0.0052 and 0.0185 mm respectively. The consistency of polymer in the flow is 5-100 ppm. Data measured from tests in clear water agrees with von Karman's drag equation for turbulent flow in smooth tube. The rule of drag variation, conditions of drag reduction and the relation between drag reduction effect and the related parameters for flow of clear water and muddy water with polymer additives are presented in the paper. The effect of drag reduction increases with the consistency of polymer and the flow velocity. The maximum drag reduction is up to 71% for clear water and 39% for muddy water which is less than that for clear water under the same test condition. The effect of drag reduction decreases as the concentration of sediment in muddy water increases, and the effect of sediment grain size on drag reduction is not obvious. The drag equation (4)for clear water flow with polymer addi tives (1/f~(1/2))_p=4log(Re_1f(1/2)_p-0.4+A (4) is presented in the paper, This equation conforms with the experimental results on the whole. For muddy water flow with polymer additives, not only the drag force decreases, the critical velocity also decreases. When the concentration of muddy water S_v=20%, the critical velocity V_D decreases about 30%, thus the flow characteristics and the economic index of muddy water flow will be improved. This is of great importance for the long distance transportation of sediment and the full use of water and sediment resources.

本文简述了在特制装置内,对清水及浑水管流中添加微量水溶性长链型高分子聚合物聚丙烯酰胺的方法来降低摩阻损失进行了初步试验研究。关于聚合物减阻的理论及试验研究是一个相当广泛而又重要的课题。文中首先介绍了清水聚合物流减阻条件、阻力变化规律及减阻效果与流速及聚合物浓度的关系,并提出清水聚合物流阻力表达式(4),该式与试验结果大体相符;继而着重介绍了浑水聚合物流减阻效应,并讨论了减阻效果与流速、聚合物浓度、悬沙粒径及浑水浓度等基本参数之间的关系。浑水聚合物流不但使阻力大幅度下降,同时临界流速也显著减小,从而改善了浑水流动特性和经济指标。对泥沙长距离输送、充分利用水沙资源有很大意义。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关drag forces的内容
在知识搜索中查有关drag forces的内容
在数字搜索中查有关drag forces的内容
在概念知识元中查有关drag forces的内容
在学术趋势中查有关drag forces的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社