振动

The general situation and development of road roller at home and abroad is gave at the beginning of this thesis, including the different pressing mechanism of various rollers. It is analyzed that the useable range of various roller and their advantages and disadvantages. On the basis of model mechanism design and experiment of those self-moving vibrating pressing machine, it is reached the principle and program of a new type of pressing mechanism? double-frequency vibrating pressing machine.

本文首先介绍了国内外压实机械的概况和发展方向，以及各种压实机械的不同压实机理，分析了各压实机械的适用范围及其利弊，并且在自行式振动压实机样机的设计、性能试验的基础上，提出了多频振动压实理论，从而得出了一种新型压实机械—双频振动压实机及其设计原理和方案。

In order to investigate the dynamic behavior of experinent simulation and behavior in situ, the numerical models under different slope and design parametes are established. The vibration forces are simulated from simple harmonic motion and from real earthquake records. The deformation of geosynthetic reinforced soil wall and interior failure surface generated the wall are also investigated.

为了解试验模拟与现地受振动之动态行为，建立不同坡度与设计参数之分析模型，其振动力分别为简谐振动与真实地震记录，并藉由数值模拟的方式，探讨不同振动力对加劲挡土设施之墙面变形与土体内部产生破坏面之动态反应。

According to piezoelectric equation and vibration theory of quartz crystal, we studied the elastic wave＇s transmission characteristic in a AT-cut thickness-shear-vibration quartz crystal, and the frequency conditions of which quartz crystal resonator formed stationary wave in electrode district.

根据石英晶体的压电方程和晶体振动理论，研究了AT-切石英晶体厚度切变振动模式下振动频率与结构参数间的关系，以及石英晶体谐振器在电极区形成稳衡驻波的频率条件及电极区外波的传播特性。

First, it is discussed about the relation between the dynamic stiffness submatrix of the supports system with variable stiffness and damping and the optimum output-feedback matrix when the rotor-supports system is governed by the optimum control laws.

本章进一步研究转子—轴承系统变刚度阻尼支承振动主动控制问题，提出了在最优振动主动控制规律的有效频率范围以外，对转子—轴承系统进行次优振动主动控制的策略思想。

Using the simulation calculation program and adopting the single factor analytic approach, simulation results are gotten and conclusions can be drawn from the simulation results. The parameters have a little influence on vibration of the driver's seat when the frequency of the vibratory force is larger than 20Hz, and the zone that the parameters have great influence on vibration of the driver's seat is nearby the sympathetic vibration frequency of the system which is about lOHz.

利用编制的模拟计算程序，采用单因素分析法，分析了各参数对驾驶员座椅处振动位移的影响：在激振力频率大于20Hz后，各参数对驾驶员座椅处振动影响较小；各参数对座椅振动影响较大的区域在激振力频率为10Hz附近的共振区。

Firstly the dissertation analyses the reason of vibration and noise of the transmission gear and the box, drawing a conclusion that the change of gear mesh rigidity and transmission error are the crucial causation to engender vibration and noise of the gear-box; the main source of the noise is the syntonic noise in box vibration and noise.

本文首先分别分析了变速箱传动齿轮和变速箱箱体的振动噪声产生机理，得知产生变速箱传动齿轮振动噪声的主要因素是轮齿啮合刚度的变化和传动误差的影响；且在变速箱箱体振动噪声中自鸣噪声是汽车变速箱的主要噪声源。

The theory of QRMT is that exogenous physical resonance of the music sympathizes with endogenesis biological resonance of the body, supplying body with weightily undertone vibration energy of 16-150HZ , and through syntony process, activating biological activity and producing the same frequency syntony effect with every organ.

量子波动共振音乐治疗主要是让音乐的「外源性物理振动」与人体的「内源性生物振动」产生共鸣，给予人体16-150HZ 的重低音频振动能量，透过谐振激发生物的本来活性，便可以与人体器官产生同频谐振的作用。

Railway ; cars ; vibration/railway cars in series ; vibration analysis ; inertia tensor ; vibratory differential equation

铁道；车辆；振动/铁道车辆联挂；振动分析；惯量张量；振动微分方程

From the angle of vibration, powertrain is divided into a bending system and a torsional system.

从振动的角度看，车辆动力传动系可分为弯曲振动系统和扭转振动系统。

The mechanics model of tramcar and track,mathematical model of tramcar based on the Newton's second law and mathematical model based on the Bernoulli-Euler Beam theory are built respectively.

建立了大型矿车与矿井运输轨道的耦合动力学模型，根据牛顿第二定律建立了矿车振动数学模型，根据伯努利—欧拉梁模型建立轨道振动数学模型，以Simulink为仿真工具对矿车越过轨道连接处的台阶时车体及轨道的振动特性进行了动态模拟。

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。