模态

The effects of frequency veering features on mode localization of the mistuned system were analyzed with L. It is shown that the distance between the frequency veering curves at nodal diameters is a key parameter, and it exists a minimum value for the parameter, around which blade modes are very sensitive to mistuning, and can result in dramatic fluctuation of the mode localization degree.

研究表明，频率转向曲线之间关于节径的最小间隙是反映频率转向特征的重要参数，并存在一个转向频率间隙的极小值点，在该极值点附近，频率转向区内的模态对叶片失谐非常敏感，并会导致模态局部化程度剧烈变化。

Based on mass-spring model, a method of automatic mode-selecting method is presented to solve the difficulties of selecting corresponding modes close to the excitation frequency, in adaptive perturbation for mistuned bladed disks.

摘要针对自适应摄动法在失谐叶盘受迫振动分析中，选择接近激振力频率的相应模态数目难于控制的问题，基于质量－弹簧模型，提出一种自动选择模态的方法。

The perturbation methods are the common analyzing method for studying thevibratory response of the mistuned bladed disk, but different perturbation methodshave their own relying conditions on the system parameters. In this dissertation, threekey perturbation methods are studied for their application conditions. Their relyingconditions on the system parameters are summarized.

本文对三种常用摄动法的构造特点及其适用性进行了研究，总结了它们在分析失谐叶盘系统振动响应时对于系统参数的适用条件；针对自适应摄动法在分析失谐叶盘系统振动响应时，对于基系统模态的选择难以控制的问题，提出了一种模态自动选择法。

Theeffects of mistuning on the forced response are also analyzed in the frequency veeringregion. The outcomes of this dissertation improve the fundamental theories of thevibration localization of the mistuned bladed disk.

研究表明：在频率转向区中，叶盘系统模态高度密集，从而更容易导致叶盘系统产生较强的模态振型和振动响应的局部化。

The reciprocal effects between the frequency veering and the sensitivity ofmistuning for a bladed disk are studied. The investigation is based on a finite elementmodel. The reason and features of frequency veering of the bladed disk are analyzed.By using the localization parameter, the effects of mistuning on the system modallocalization of the bladed disk are analyzed in the frequency veering region.

分析了叶盘系统频率转向现象产生的原因及其特点；利用本文提出的模态局部化参数，研究了频率转向区域内叶盘系统的高密集模态对失谐的敏感性；分析了频率转向区域内失谐叶盘系统的振动响应局部化特性。

Mistuning destroysthe symmetric properties, and produce modal localization for a bladed disk. We definea modal localization parameter for the blade-disk system modes.

本文利用叶片的最大振动能量与其它叶片平均振动能量之间的相互关系，定义了一个系统模态局部化参数，该参数能够较为准确地反映叶盘系统模态振型的能量集中程度。

In order to verify the accuracy of the modeling built by ANSYS and the precision of the analytical results, the modelings of both rotor and motor are experimented at same time. After the comparisons of the numeric analysis results, experimental values are the foundation to consider the physical meanings and to suitably modify the modeling in order to decrease the differences between both results, to obtain the correct modeling type, to increase the analysis accuracy, and to provide designers a reliable basis.

为了证实本文中软体建模的精确度以及各项分析结果的准确性，以马达为例，在进行马达转子的模态分析时，一方面做马达模态测试实验，经由两者数值分析结果之比较，以实验值为基准，根据有限元素模型的物理意义，作适当的修改，减少分析及实验结果两者间的误差，以获得正确的建模型式，提高分析精确度，使提供给设计者为可靠的依据。

The method of mechanical impedance to calculate stators natural frequency is given, and so is the flow of modal analysis. These results are compared.

给出了机械阻抗法计算SR电机定子固有频率的方法和使用模态分析仪分析模态的流程，针对实验样机给出计算及实验结果，并进行对比。

For the first time, SPAMP technique applied on the locomotive and passenger vehicles is proposed by using both the theoretical modal parameter analysis and the operational modal parameter identification techniques.

本文在铁路客车实测试验的基础上，采用试验测试和样机分析相结合的方法综合研究铁路客车动力学问题，提出适合铁路客车动态特性研究的环境激励下的模态参数辨识方法，建立铁路客车运行特性和运行模态参数的关系，探索这些理论和方法在铁路客车的正确应用。

To construct the analyzers, we also introduce another kind of devices called "mode retarders", which are analogous to wave plates because they introduce phase differences between corresponding HG modes.

构成此分离器的关键是一种名叫「模态相位延迟器」的元件，它的效果类似於「波片」，能对不同的厄米高斯模态产生对应的相位延迟。

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。