查询词典 suspension bridge

Lo Wu Bridge is not only a narrow bridge at the time, only moving train, but no bridge unroofed shed, left to sun and rain. In 1959, the government will be the Lo Wu Bridge turned into steel and concrete bridge deck has also widened more than doubled. 1962, also stamped with an iron Peng Ding, added in the iron bridge on both sides of the iron railing, and covered the sidewalk. The 20th century, the early 70s, the author in Guangzhou Railway Administration to do secretarial work, on several occasions to the Footbridge is the first walk.

当时的罗湖桥不但桥面狭窄，只能行驶火车，而且桥身无顶无棚，任凭雨淋日晒。1959年，人民政府将罗湖桥改建成钢筋水泥桥，桥面也加宽了一倍多。1962年又加盖了铁皮篷顶，在铁桥两侧增设了铁栏杆，并铺上了人行道。20世纪70年代初，笔者在广州铁路局做秘书工作，曾多次到罗湖桥头漫步。

Based on rail/wheel reaction and track/bride reaction theory and systems engineering theory, new vehicle-track and vehicle-track-bridge system dynamic models are established and discussed in details, including ballast track model and ballastless track model. The characteristics of the models are:(1) vehicle-track and vehicle-track-bridge system dynamic models are coupled in vertical and lateral;(2) track vibration on bridge is taken in account, track on bridge is considered as one or two layer continuous-point supported rail model, according to actual track structure, interaction between vehicle and bridge transfer from track structure;(3) three type of ballastless track models (tieembanked, elastic-tie-block, slab track) are presented;(4) models reflect the main feature of actual vehicle, track and bridge structure, the response computation frequency of models is relatively broad, which can be applied to analyze both low frequency and high frequency vibration.

基于轮轨相互作用和线桥相互作用特点，本文从系统工程角度出发建立了车辆、有碴轨道和无碴轨道、简支箱梁桥垂向和横向耦合系统动力分析模型，该系统模型具有以下特点：（1）车线、车线桥体系均考虑为垂向、横向耦合振动系统，车线间通过轮轨接触几何关系耦合，轨道与桥梁间通过轨道与梁体间的力与位移协调条件耦合；（2）充分考虑桥上线路在车线桥系统中参振作用，根据桥上线路轨道结构特点将桥上轨道结构模型具体化，即对桥上轨道结构视为多层支承体系，车桥间的动力作用通过轨道结构来传递；（3）建立了三种形式无碴轨道动力分析模型，即长轨枕埋入式、弹性支承块式和轨道板式无碴轨道模型；（4）系统模型详细，分析频带宽，适用范围较广。

In the interim governance new river dug river 3.3 kilometres, the new zoo at the locks, new long river bridge, forklifts official, Beijing kits Railway Bridge, Highways and Bridges Academy, timber building bridges, small East Village West Bridge, the small East Village Bridge, MTR Cheliangduan, xinjiekou Main Street Bridge, North riparian communities a total of 11 blocks across the bridge, one Block secret scheme, two blocks ran Jiezhizha 2 Block Terminal 1 Block, fill water gates, the original half-buried in the ground with heavy river finally light.

在此次治理中转河新挖河道3.3公里，新建动物园船闸一座、新建长河桥、叉车厂桥、京包铁路桥、学院路桥、木材大厦桥、东小村西桥、东小村东桥、地铁车辆段、新街口大街桥、北滨河路桥共11座跨河桥，1座暗涵，2座暗沟节制闸，2座码头，1座补水闸，原来被埋在地下的一半转河终于重见了天日。

This thesis is based on crane dynamic theory and finite element theory, and utilized software platform of ANSYS. It realizes model analysis and transient analysis of steel rope and bridge structure. The data and conclusion offered effective method to bridge crane design. The thesis mainly includes:According to crane dynamic theory, established relevant dynamic model, and analyzed the dynamic properties of the bridge structure of the bridge crane, including the natural frequency, the model shape and the dynamic stress. A way to analyse the dynamic response of the bridge structure of the bridge crane which takes into account the dynamic properties of the steel rope pulley block has been explored successfully.

本文基于有限元理论和起重机动力学理论，以有限元分析软件ANSYS为平台，实现了计算机对钢丝绳系统和桥架的模态分析和瞬态动力学分析，得到的分析数据和结论对桥式起重机动态设计提供了有效的手段，论文主要内容包括：根据起重机动力学理论，建立了相关动力学模型，并对桥架结构进行动态性能分析(包括固有频率、振型以及动应力)的分析，探索出一种考虑钢丝绳滑轮组的动态特性在内的桥式起重机桥架结构动态应力分析的方法。

In order to ensure the construction process safe and the bridge structure would reach its ideal state, lots of questions in its whole construction control and swivel ereetion construction control are discussed and studied.Firstly, based on the experiences about the cable-stayed bridge's construction control, do emulational anlysis to Sui Fenhe cable-stayed bridge by using the bridge analyzing program of BSAS and Dbridge, analyze the parameters' sensitivity, study the temperature effects, discern the relevant parameter's errors about construction control and optimize its construction state.Secondly, as an example of Sui Fenhe cable-stayed bridge's swivel erection construction control, present the design and construction techniques of simple point supporting and even articulation and level swivel erection for long-span cable-stayed bridge, study its load-bearing system, balance system, power system and adjustment system in detail, check its static stability on the state of swivel erection construction and monitor the whole swivel erection construction.

首先，在斜拉桥施工控制经验的基础上，用桥梁结构分析程序BSAS和Dbridge对绥芬河斜拉桥进行了详细的施工仿真分析，参数敏感性分析，温度效应分析，施工控制影响参数误差分析和结构施工状态的最优化控制；其次，以绥芬河斜拉桥转体施工控制为例，介绍了大跨度斜拉桥单点平铰水平转体设计与施工技术，详细研究斜拉桥单点平铰水平转体支承系统、平衡系统、动力系统和调整系统，并对本桥结构转体施工做静力稳定性验算及转体过程的监控。

A Some environmentalists are against the project on biological grounds.B What do the world's longest bridges have in common?D They're what will keep the bridge from going anywhere.E The second job will be to pull two sets of steel cables across the strait, each set being a bundle of 44,352 individuals steel wires.F They will tip up the scales at 166, 500 tons more than half the bridge's total mass.__2__. They're suspension bridges, massive structures built to span vast water channels or gorges. A suspension bridge needs just two towers to should the structure's mammoth weight,..

B。 分析：思路特点：注意空格后句中的词语使用特点：空格后面连续两句都涉及到了"suspension bridge/吊桥"因此判断空格处出现对"吊桥"进行讲述的句子的可能性最大，但被选项中没有该词出现，注意到空格后的句子中出现了代词They，该词的出现表明前面有复数的名词与之相呼应，而且They内容是指"桥"，因此排除A，C和E， F（没有与They呼应的内容），所以答案是B。

A Some environmentalists are against the project on biological grounds.B What do the world's longest bridges have in common ?D They 're what will keep the bridge from going anywhere.E The second job will be to pull two sets of steel cables across the strait , each set being a bundle of 44,352 inPiduals steel wires.F They will tip up the scales at 166, 500 tons – more than half the bridge 's total mass.__2__. They're suspension bridges , massive structures built to span vast water channels or gorges. A suspension bridge needs just two towers to should the structure's mammoth weight,..

B。 分析：思路特点：注意空格后句中的词语使用特点：空格后面连续两句都涉及到了"suspension bridge/吊桥"因此判断空格处出现对"吊桥"进行讲述的句子的可能性最大，但被选项中没有该词出现，注意到空格后的句子中出现了代词They，该词的出现表明前面有复数的名词与之相呼应，而且They内容是指"桥"，因此排除A，C和E， F（没有与They呼应的内容），所以答案是B。

A some environmentalists are against the project on biological grounds.b what do the world's longest bridges have in common?d they're what will keep the bridge from going anywhere.e the second job will be to pull two sets of steel cables across the strait, each set being a bundle of 44,352 individuals steel wires.f they will tip up the scales at 166, 500 tons – more than half the bridge's total mass.__2__. they're suspension bridges, massive structures built to span vast water channels or gorges. a suspension bridge needs just two towers to should the structure's mammoth weight,..

b。 分析：思路特点：注重空格后句中的词语使用特点：空格后面连续两句都涉及到了"suspension bridge/吊桥"因此判定空格处出现对"吊桥"进行讲述的句子的可能性最大，但被选项中没有该词出现，注重到空格后的句子中出现了代词they，该词的出现表明前面有复数的名词与之相呼应，而且they内容是指"桥"，因此排除a，c和e， f（没有与they呼应的内容），所以答案是b。

Aiming at calculation of the equivalent rigidity of truss stiffening girder in an aeroelastic model design of a long-span suspension bridge with truss stiffening girder,Aizhai bridge,a super-long -span suspension bridge across deep valley with single span,was taken as an example for investigation.

针对大跨度桁架加劲梁悬索桥气弹模型设计中主梁等效刚度计算问题，以矮寨大桥为实例，建立不同长度空间桁架加劲梁节段模型有限元模型，通过悬臂梁位移法反算得到主梁的等效刚度特性，研究了不同荷载施加方式以及不同梁段长度对等效刚度特性的影响。

In general, large-span cable-stayed and suspension bridges require bridge towers with a length of more than tens or hundreds of meters. Due to the unproportionate slenderness ratio, the bridge tower becomes vulnerable to air and thus easy to be distorted or to vibrate, which will affect the stability of the entire bridge structure. Therefore, it is of great significance to carry out an in-depth research on the force feature of the bridge tower in a flow field.

大跨度的斜拉与悬索桥，往往都需要建造数十米甚至上百米的桥塔，过大的长细比，使得桥塔在流场中受到气体的作用容易发生变形或振动，从而影响了整个桥梁结构的稳定性，因此，深入细致地研究桥塔在流场中的受力特性非常有必要。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"