阻尼的

With the calculating the damping circuit parameter of traction coil on SS4G type electric locomotive ,the reasons of the frequently burning down is analyzed,and the method of calculating damping circuit parameter is concluded.

通过对 SS4G型电力机车牵引绕组阻尼电路参数的计算，分析了阻尼电路频繁损坏的可能原因，并归纳了阻尼电路参数的计算方法，最后提出了阻尼电路参数的改进建议。

Characteristics of free vibration and forced vibration of a damped system with dry frictional damping,viscous damping and c x·2 damping are analyzed and calculated,acceleration response of free-vibration of the dry frictional damped system has a sudden change when x· is zero,the change value is constant and depends only on the natural frequency ωn and the displacement xk due to dry friction.

本文对存在干摩擦阻尼、粘性阻尼和c.x2阻尼系统的自由振动及受迫振动特性进行了解析及数值计算，得到干摩擦阻尼系统自由振动的加速度响应在速度零点有一突变，这一变化量为定值，且只与系统固有频率ωn及摩擦当量位移xk有关。

The dynamic cohesion of reinforced-soil increases obviously, but its dynamic internal friction angle is unchanged compared with pure soil.

一层加筋的阻尼比比两层加筋的阻尼比要大；土体的密实度对阻尼比有较为明显的影响，密实度越大阻尼比越大。

The microstructure of ferromagnetics for Fe-Al alloys as well as the effects of alloy elements and heat treatment on the damping behavior and mechanical properties of Fe-Al based alloys have been investigated systematically by means of optical microscopy,scanning electron microscopy.

采用光学显微和扫描电子显微观察等方法，系统地研究了Fe-Al系铁磁性阻尼合金的微观组织，考察了合金元素、热处理工艺对合金阻尼性能和力学性能的影响，探讨了Fe-Al合金产生高阻尼特性的微观机制以及Fe-Al系高阻尼合金的同质和异质焊接性能。

The designs of the gap and the orifice vane MRF dampers for the vehicle are introduced. According to one of the primary gappy one s deficiencies compared with the orifice one that the magnetic flux density in the gap isn t strong enough,the design of three phases vane MRF damper with tangent magnetic core is proposed.

介绍了车用缝隙式阻尼型和孔式阻尼型叶片MRF减振器的磁路设计方案，并针对缝隙式阻尼型相对于孔式阻尼型间隙处磁感应强度小的不足，提出了采取切向放置铁芯的三阶段叶片式MRF减振器的设计。

Many researchers have devoted their work to the development of modal analysis extraction techniques in order to obtain more reliable identification of the modal parameters. There are many damping identification methods, but each one has different merit and defect. In order to find which one is the most reliable method with respect to certain characteristics, this thesis focus on how to identify structure's damping in time domain. The following works have been done in this thesis: 1. Investigate four modal analysis methods——the LSCE Method, the Ibrahim Time Domain Method, the Time Domain Collectivity Modal Parameter Method, the Rational Fraction Polynomial Method and improve on the ITD Method in arithmetic.

本文主要做了如下工作： 1、集中研究了四种常用的模态识别方法，即最小二乘复指数法、Ibrahim时域法、时域总体模态参数辨识法及有理分式多项式法，并对ITD法在算法上进行了一定的改进； 2、建立结构动力模型，利用这四种方法在具体条件下识别结构的阻尼，并绘制相应的图； 3、讨论不同的情况下，不同的识别方法对阻尼识别精确性的影响； 4、基于业已明确的阻尼识别的精确性，根据研究的需要，指出在实际的识别过程中，如何选择最佳的识别方法以及识别过程中需要注意的问题； 5、选择最为精确的阻尼识别方法，以导师李书进教授在日本京都大学防灾研究所强震反应实验室所做的一足尺木制结构房屋的动力测试实验为实测模型，识别其阻尼； 6、在本文的最后，尽作者所知，提出了一些需要改进的地方，并对未来的研究方向给出了作者的建议。

The project discussed influence of damp force to the parameter of MR damper and carried finite element analysis of MR flow field and shearing stress.

推导出Nano-MR阻尼器阻尼力的计算公式。讨论了阻尼器结构参数对阻尼特性的影响。

Armour rods (to be installed in suspension clamps) Parallel clamps Sub-Total, items 4.1-4.7 OTHER HARDWARE Counterweights for jumper or suspension insulator strings, including necessary device for attachement 50 kg 100 kg Sub-total, item 5.1 – 5.3 SPARES Insulator Units Type U160 Type U210BS Hardware for Conductor ACSR-BISON Complete set of hardware and fittings for suspension string Complete set of hardware and fittings for tension string Complete set of hardware and fittings for jumper string Complete set of hardware and fittings for transposition string Extra suspension clamps Extra tension clamps Extra tension joints Extra repair sleeves Extra vibration dampers Extra armour rods Extra spacers: for span for jumper alternatively spacer dampers Hardware for Earthwire 7 No. 6 AWG Complete suspension set Complete tension set Vibration dampers, Stockbridge type Extra tension clamps Extra tension joints Extra vibration dampers Extra parallel clamps Extra armour rods Hardware for Earthwire 7 No. 6 AWG Complete suspension set Complete tension set Vibration dampers, Stockbridge type Extra tension clamps Extra tension joints Extra vibration dampers Extra parallel clamps Extra armour rods Sub-Total, items 6.1-6.4 Sub-total, Items 1.4, 2.7, 3.8, 4.8, 5.4 and 6.5 Transfer to Summary, Schedule AS-1

装甲棒 平行夹具小计，项目4月1号至4月7号其他硬件重物跳线或中止绝缘子串，包括必要的设备attachement 50公斤 100公斤小计，项目5月1号至5月3号备件绝缘子单位型U160 类型U210BS 硬件导体钢芯铝绞线，拜森一套完整的硬件和配件的暂停字符串一套完整的硬件和配件的紧张字符串一套完整的硬件和配件的跳投字符串一套完整的硬件和配件的转字符串额外的悬浮夹额外的紧张局势夹额外的紧张关节额外的修理袖子额外的振动阻尼器额外的装甲棒额外的间隔：为跨度跳线或者间隔减震器硬件Earthwire 7特设工作组第6号完整的悬挂设定一套完整的紧张局势振动阻尼器，斯托克型额外的紧张局势夹额外的紧张关节额外的振动阻尼器额外的平行夹具额外的装甲棒硬件Earthwire 7特设工作组第6号完整的悬挂设定一套完整的紧张局势振动阻尼器，斯托克型额外的紧张局势夹额外的紧张关节额外的振动阻尼器额外的平行夹具额外的装甲棒小计，项目6月1号至6月4号小计，项目1.4 ， 2.7 ， 3.8 ， 4.8 ， 5.4和6.5 （换乘摘要，附表1 仅供参考

In order to study the effects of cold-rolling deformation on damping characteristics of TiNi alloys and the relationship between the damping characteristics and the microstructure, the damping characteristics of martensite for Ti_(50)Ni_(50) alloy have been investigated systematically by DSC, TEM, DMA and sound internal friction test.

为了探讨冷轧变形对TiNi合金阻尼特性的影响，及TiNi合金马氏体的阻尼特性与组织结构之间的关系，采用示差扫描量热分析、透射电镜分析、动态机械分析和音频阻尼测试方法，系统研究了冷轧变形后Ti50Ni50合金马氏体的阻尼特性。

In chapter three, the passive vibration control of a smart cantilever beam with piezoelectric shunt damping system is studied theoretically. In this chapter, the mechanical impedance of piezoelectric shunt damping system is analyzed, and the parameters of the RLC piezoelectric shunt circuit are optimized via transfer function of the piezoelectric shunt damped beam in order to optimize the vibration damping effect.

第三章。研究了利用压电分流阻尼系统进行压电智能悬臂梁被动振动控制的方法，分析了压电分流阻尼系统的机械阻抗，并通过传递函数方法对RLC串联压电分流谐振电路元件的参数进行了优化，以使压电分流阻尼系统的阻尼效果达到最优。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。