查询词典 static friction

The stretching influence on the near trusses should be considered when using the stretching-twice method, and the construction is hard to be controlled. The Harbin exhibition sports center with a 128m support span, attached to a deep design calculation of the super-large span prestress truss string structure, stretching once in tension bed method is brought forward for the bottom cable of the single truss string structure. From calculation research on the friction force between the tension bed and the truss string structure, the friction influence is considered for the displacement method of the middle of span, with the action of the fixed cable stress. This method, with vertical displacement of the middle of span as its main control target for prestress stretching, is successfully applied in the prestress stretching construction of the project.

二次张拉需考虑张拉对相邻桁架的影响，施工控制难度大，本文结合哈尔滨会展体育中心支座跨度128m的超大跨度预应力张弦桁架结构的深化设计计算，提出了单榀张弦桁架下弦拉索胎架一次张拉法施工方法，通过对张拉阶段胎架与张弦桁架间摩擦力的计算研究，定量索力下跨中位移法考虑摩擦力影响，以跨中竖向位移作为预应力张拉的主要控制指标，成功地完成了该工程预应力张拉施工。

The paper is based on wave resistance, which is one of bases in ships total resistance, is considered the friction resistance coefficient of the equal fiat panel, replacing the friction resistance with "1957 international ship mold experiment pond converting formula of the solid ship- ship mold " to set up the total resistance, and is worked to use the model of fore part, half part, and whole part of ship for the optimization.

本文基于兴波阻力(中、高速船舶的兴波阻力在船舶总阻力中占有相当的比例)数值计算：考虑相当平板摩擦阻力系数，将摩擦阻力用&1957年国际船模试验池实船-船模换算公式&简化来构建摩擦阻力和兴波阻力的总阻力公式；采用最优化计算方法分别对船首部、前半体及整体船型进行理论优化设计的探讨。

First, the domestic and oversea research actualities of friction dynamic characteristics have been summaried, the manifestations and formings of these friction phenomena are discussed.

因此本课题基于摩擦实验研究，对摩擦特性进行分析，提出新的宏观经验模型结构，并给出相应的摩擦信号处理和参数识别过程，此外，运用数值方法对滑动导向系统的动力学特性进行了探讨。

The unique property about particle shells is that they have a larger difference in the friction in oil then on the backend of the lane. The friction of a reactive ball and a particle ball on the backend will not be very different.

微粒树脂的特性在於它在油区可以提供较大的摩擦力，至於在球道末端的乾板区，则和反应树脂的表现并没有什麼的差别。

By analysing the scar of Four Ball Friction Test and XPS photoelectron spectrum. The mechanism of ZnDDP additive effect on friction performance was disclosed.(5) The principle of CVT hydraulic control is studied.

研究了CVT的液压系统控制原理，研制了CVT的实验变速箱、CVT变速控制的液压泵站和基于PC机的电控系统，搭建了CVT传动性能实验台，为CVT传动的基础性研究奠定了基础。

"Friction",Friction causes a rolling ball to stop finally.

&，&摩擦力使得一只滚动的球最终停了下来&，，&Friction的中文意思为对流摩擦力加热辐射

It has discussed the sort of the friction between the belt and the wheel, and how the work of the friction affects the energy and the ability of mechanical transmission while it is working.

摩擦力做不做功？所做的功对传动过程中的能量有何影响？如何建立皮带传动的力学关系？这些都是学生在物理学习中常遇到的问题。

These influences can be divided into two states: friction and block interference. Based on the data of interference of bicycles on vehicles' driving in typical road section in Beijing, this paper quantitatively analyzes the velocity changing tendency of vehicles under different interference, velocity distribution frequency, and critical transformation of different interference state. The friction and block interference coefficients are also worked out, which are useful to compare interference degrees under different road conditions.

文章将自行车对机动车的影响划分摩擦干扰和阻滞干扰两种状态，通过采集北京市三个典型路段的混合交通干扰数据，定量分析了不同自行车干扰状态下机动车速度的变化趋势，以及速度分布频率，定义并计算了干扰状态相变的临界点：干扰变化阀值，进一步计算了可对不同道路条件下干扰程度进行比较的摩擦干扰系数和阻滞干扰系数。

Puts briefly, the braking system has the braking force through the friction filler block clamp revolving brake disc or the lining compaction revolving brake drum, during this process as a result of will rub produces the massive friction heats.

简单地说，制动系统是通过摩擦衬块夹紧旋转的制动盘或摩擦衬片压紧旋转的制动鼓来产生制动力的，在此过程中将由于摩擦而产生大量的摩擦热。

With the increase of temperature, the friction coefficient of the composition materials increased and the wear rate of the composition materials decreased.PPTA pulps in the friction materials overcome the shortcoming of asbestos that has high wear rate at high temperature.

结果表明，3种芳纶浆粕增强的摩擦材料都具有优良的摩擦磨损性能，特别是随着温度升高，摩擦系数有较大提高的同时，磨损率明显下降，克服了石棉增强的摩擦材料在较高温度下磨损率较大的缺点。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"