阻尼振动

Vibration and wave ; damped wheel ; finite element analysis ; structural loss factor

振动与波；阻尼车轮；有限元分析；结构损耗因子

SSI system ; shaking table test ; transfer function ; composite modal damping ratio

SSI体系；振动台试验；传递函数；合成模态阻尼比

Furthermore,the influence of parameters such as the horizontal power spectrum density, basic wind pressure,span and weight of the roof,damping ratio,terrain categories and support restraints,which are usually critical to the wind vibration factor,are also discussed.

本文基于随机振动理论利用有限元程序ANSYS对大跨度实腹式钢梁在频域内进行了风振分析，讨论了高阶振型、脉动风速谱、基本风压、屋盖重量、地貌种别、阻尼比和支座约束等相关参数对屋盖结构风振响应和风振系数的影响。

The feasible experiment of multi-state hybrid control system is carried out on a shaking table.

利用一个三层剪切型钢框架模型，对带可控开关阻尼器的多态混合控制系统进行了振动台实验。

The widely used rubber bushings can't provide large damping for suppressing excitations from road and /or wheel unbalance.

常见的橡胶衬套很难提供在低频振动控制时所需要的大阻尼。

Identification and selection of dominant vibration-modes contributory to wind-induced vibration response for large-span space lattice structures;2. The wind-induced vibration response of single-layer cylindrical shells is analyzed by frequency domain method in this paper.

运用频域分析法对单层筒壳进行风振动力响应分析，在基本参数(阻尼比参数、地貌参数、几何参数、支座高度参数)的常用变化范围内，进行大量的算例计算，然后对所得的计算结果进行统计分析，考察各参数对单层筒壳的风振响应及风振系数的影响，在此基础上提出单层筒壳抗风设计的实用方法。

In succession, by using of the simulative program under various running conditions, we studies the different effects that various parameters on the dynamic current-collecting such as running speed, span length, ocs tension force, masses of pantograph head and framework, damping capacity and stiffness etc. Moreover, measures are suggested to improve the quality of current-collecting, especially the idea of active control scheme, which restains the fluctuation of contact force by modulating the air pressure of pantographs airbag.

利用弓网仿真程序对各种工况的弓网受流进行模拟仿真，分别研究了列车运行速度、接触网跨距、接触线张力以及受电弓弓头和框架质量、阻尼、刚度等对弓网系统受流的影响，提出通过主动控制技术对弓网系统的振动进行抑制的气囊调节方法，将受电弓气囊的气压值作为控制对象，通过对气囊气压的调节来抑制弓网接触压力的波动。

Special support consisted of a spring coil and a container has been used in the spindle rotor system.

本文利用机械振动的机械阻抗技术，对国产1200系列纺纱锭子阻尼器的机械阻抗特性进行了实验测定，进而分析了此卷簧支承的动态特性。

The vibratory equation of Timoshenko's beam supported by continuous multilayer elastic-damping system is presented.

本文导出了支承于连续多层弹性阻尼系统上的Timoshenko梁的振动方程，并考虑了轴向力的作用。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。