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1)  aeolian vibration
微风振动
1.
An on-line measurement system of aeolian vibration of500 kV transmission line crossing;
500kV线路大跨越微风振动在线监测
2.
Field measurement of aeolian vibration of Pingwei-Luohe 500 kV transmission line;
500kV平洛送电线大跨越微风振动测试
3.
This paper simply explained the principle and main reasons to cause aeolian vibration on transmission line.
微风振动是高压输电线振动最普遍的形式,同时也是造成输电线路损伤的主要原因。
2)  breeze vibration
微风振动
1.
Experiments and field measurements of damper desgned for breeze vibration of a transmission line across Xunjiang river;
浔江大跨越输电线微风振动消振设计试验研究及现场测量
2.
This article concluded a variety of vibration preventing system for OPGW,which mainly included the treat with the breeze vibration and galloping for OPGW.
对目前国内OPGW的防振形式进行了归纳,提出对OPGW微风振动和舞动的治理方案。
3.
While some tubular members of the tower under small wind speed easily occurs a transverse vibration to wind direction,caused by Kaman vortex and called breeze vibration.
在此基础上,结合以往研究成果,提出了钢管塔微风振动构件起振临界风速较为全面的计算方法。
3)  aero-vibration
微风振动
1.
Second,a new aero-vibration force induced by shed vortex had been educed by wind power equivalent principle,and this force has the capability to account for the aero-vibration distribution and the wind power input which had been obtained in laboratory.
为预防微风振动对输电线路的破坏、有别于传统的能量平衡法,研究了微风振动的半解析解。
2.
The vertical, steady-state, monofrequent aero-vibration of a single 1000kV UHV transmission conductor with a Stockbridge-type damper attached was researched by the finite element method (FEM) differing from the traditional energy balance method (EBM).
为了分析安装防振锤的1000kV特高压架空输电线路的微风振动强度,研究了利用有别于传统能量平衡法(EBM)的有限元方法(FEM)分析微风振动的关键技术。
3.
Differing from the traditional energy balance method(EBM)the finite element method(FEM)is adopted to analyze the aero-vibration of 1000kV UHV transmission conductors.
对于1000kV特高压架空输电线路,有别于传统的能量平衡法(EBM),研究了利用有限元方法(FEM)分析微风振动的关键技术。
4)  wind-induced vibration
风致振动
1.
Advances in research of wind-induced vibration of long-span high-voltage transmission line system;
大跨越高压输电塔线体系风致振动的研究与进展
2.
Experimental study on wind-induced vibration inertial force for a high-rise building;
某高层建筑风致振动惯性力的试验研究
3.
The wind-induced vibration analysis is studied based on the modal analysis.
在模态分析的基础上,进一步对管桥进行风致振动分析。
5)  wind induced vibration
风致振动
1.
In this paper,an aeroelastic model of an annular cantilevered roof of a stadium was successfully designed and manufactured on proper simplification of the similarity rules and based on the characteristics of the structure and wind induced vibration responses of such structures.
通过对结构典型测点加速度响应谱的特征分析以及对风向和风速对结构加速度和位移响应的影响的分析得到:看台以上挑篷中部的振动最强;风向对挑篷不同部分的振动幅值和参与振型有很大影响;挑篷的风致振动响应由多模态贡献。
2.
Safety and serviceability are in this paper preliminarily established for controlling wind induced vibration of long span bridges.
并针对大跨桥梁风致振动的特点 ,考虑桥梁风振的参数不确定性 ,提出了桥梁风振半主动控制的概念 ,设计了一种新型的可调频率的半主动调质阻尼器 ,建立了相应的分析方法。
3.
In order to study the wind induced vibration and modal of long span suspension bridges under large wind, the data of wind induced vibration response are got by the real time monitoring system of Humen Bridge.
为研究大跨悬索桥的风致振动及在大风下的模态 ,利用已建立的虎门大桥实时监测系统获得了风致振动数据。
6)  wind-rain-induced vibration
风雨振动
1.
A single degree of freedom wind-rain-induced vibration analytical model of a piece of cable is formed based on simplifying the influence of upper rivulet on model vertical movement to the variety of quasi steady air force with the change of system state,another two degree of freedom analytical mode is acquired after introducing the coupled effect of upper rivulet.
将上水路对斜拉索竖向振动的影响简化为拟定常气动力随其运动状态的变化,建立了斜拉索风雨振动单自由度分析模型;同时考虑上水路运动的耦合作用后,即发展成为二自由度分析模型。
2.
These wind tunnel or wind-rain tunnel tests do reveal some important features of wind-rain-induced vibration of prototype stay cables observed from site measurements.
以往的大多数有关斜拉桥斜拉索风雨振动的研究都是在风洞内进行。
补充资料:架空线微风振动


架空线微风振动
aeolian vibration of overhead line

之不能出现卡门气流旋涡。风速上限值随导线悬挂点离地面高度的增加而提高,通常达到8~10m/s。风向是振动持续稳定的必摇条件,当风向与导线轴线之间的夹角在450以上时.导线振动是稳定的,当此夹角在300~45’时,振动的稳定性很小,而当此夹角小于200时,一般不会发生振动. (3)档距长度。徽风振动以一个档距为独立的振动单元.档距愈大,由于档距长度等于半波长的整数倍的振动绷率值愈密集,故建立稚定振动的机率愈大,即振动持续时间增加。另一方面,风传输给导线的振动能t与档距长度成正比,这给大档距的防振设计带来很大困难。对于档距长度为10Om以下的小档距,不仅出现振动的机率很小,同时档距端部的阻尼作用对振动有很大的影响,故小档距一般不藉装设消振装盆. (4)导线张力.为了说明导线张力对振动的影响,引入了导线平均运行应力(通常用EDS表示)的概念,它是指年平均气沮及无外荷载条件下的导线水平应力,习惯上将此时导线张力值用导线极限强度(通常用UTS表示)的百分数来表示。提高导线张力会使导线本身的阻尼作用减小,并且导线的允许疲劳强度也随张力的提高而降低。因而提高导线张力增加了振动的危险性.国际大电网会议(CIGRE)根据各国提供的线路运行经脸进行总结,规定了一般情况下导线张力的上限值为25%UTS,这与中国根据线路的运行经验褥到的结论相同.另一方面,限制提高导线的张力必然会增加线路的建设投资。若将规定的EDS上限值作为一个绝对标准,而不考虑导线构造设计的差别,也会导致严重的振动后果,是不经济的。因此,正确地估价导线张力的影响,应从导线的阻尼作用来分析,例如结构设计相同而采用高强度材料制造的导线,应取用较低的EDS值,如果改变导线的结构设计而提高了阻尼作用,则可能取用较高的EDS值。自阻尼导线就是一种特殊结构设计的导线,其EDs值可提高到35%UTs左右,从而明显地降低了线路的造价,并解决了大跨越线档严重的徽风振动问题。 (5)惫垂线夹。虽然悬垂线夹对振动强度并无影响,但振动现象却是通过悬垂线夹转变为动态应力作用于导线的。实际运行经验说明,由于悬垂线夹的型式、性能及质t等方面的差异,或者由于安装使用不当,都会造成疲劳断股情况的极大差别。20世纪50年代曾一度认为悬垂线夹是防止导线疲劳断股的关键,企图设计一种“防振线夹”。基于这种观点研制成功了预纹丝型悬垂线夹,可以达到比较满愈的运行效果。现在对惫垂线夹的设计原则已充分考虑了徽风振动的特点,使各种常规的悬垂线夹已具有满意的防振性能。
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