拖力

中型单拖网渔船拖力与渔具系统匹配的研究

On matching towing power and gear system for medium stern trawler

拖力是流层单位面积的力。

The drag is a force per unit area of the layer .

通过计算大管棚的回拖力来选择钻机。

We choose the rigs through calculating the strength of canopy back to towing bassoon .

拖船必须拥有较大的系柱拖力，但对于挖泥船则不是重要的。

A tug boat has to possess a high bollard pull while that is not important for a dredger .

轿跑的加速，豪华轿车的舒适，拖轮般的拖力。

Sport-sedan acceleration , luxury-car comfort , and tugboat towing make this new Toy the best of the bigs .

襟翼飞机后翼上最初用来增加上升力或拖力的可灵活控制的辅助翼。

A variable control surface on the trailing edge of an aircraft wing , used primarily to increase lift or drag .

因为实际工况比较复杂，水平定向钻穿越的回拖力是各种因素共同作用的结果，所以，很难建立起与实际工况非常吻合的、具有普遍适用性的力学模型。

Because of the complicated operation conditions , the pull-back force of pipeline crossing by horizontal directional drilling depends on the combined actions of various factors .

依照上述方法，选取了五条不同型号的的双桨耙吸挖泥船进行模型试验，并分别用二因次与三因次方法对实船航速及耙吸拖力进行了预报。

Model tests are conducted with five different twin propeller trailing suction hopper dredger models . Full scale ship speed and drag force are predicted in 2D & 3D methods , and the effectiveness of the proposed method is validated .

从定倾高度m的取值、沉箱拖运时的拖力计算公式、沉箱拖带方法与拖缆着力点等方面，论述了海上沉箱拖运中的几个问题，并结合现行重力式码头规范的修改提出意见。

Some problems in caisson transportation on sea are talked about from the following aspects : Value acquirement of metacentric height m , calculation formula for towing force during caisson transportation , caisson towing method and bearing point of towing cable , etc.

通过理论分析和事实证明，在管道内充满填充液不仅可以降低管道的最大回拖力，而且还可以大大提高管道的抗失稳安全系数，有效地防止管道变形损坏。

It has been proved by both theory and practice that it not only reduces the maximum back-dragging mechanic but also greatly improves the anti-instability security and effectively prevents the deformation of the pipe when the pipe is full of the liquid .

本文针对当前非开挖技术基础理论研究滞后于工程实践的现实，对顶管的推力理论、水平定向钻进的管道回拖力及其水平钻进过程中的孔壁失稳机理等问题进行了研究。

This paper is aimed at the present situation of the basic theory lag behind on reality in project practice , some problem to be studied including the theory of jacking force in pipe jacking , the pulling force in HDD and the mechanism of instability of borehole .

针对机轮在双层EMAS的不同压入深度进行了动力学分析，得出了不同压入深度的水平拖滞力和垂直荷载的计算公式。

Dynamic analyses are made by considering the different impressed depths of tires in two layers of EMAS . The horizontal drag and vertical load to the wheels in different impressed depths are calculated .

文章以某生活模块为例，对海上运输过程中产生的拖航惯性力的生成理论、计算公式、荷载组合、有限元程序模拟、结构强度校核等进行简要介绍。

This paper takes a living quarter for example to introduce in brief the theory of towing inertia force , calculation formulas , load combination , FEM simulation and structural strength check .

将拖缆视为“刚化柔性悬索”，应用悬索理论中的悬垂线理论对拖缆的受力进行了分析和仿真计算。

This paper considers the towline as " flexible suspended cable with rigidization " model , and applies catenary theory to analyzing the stress of the towline and to performing the simulation calculation .