查询词典 mode of vibration

Based on the alterative information of vibration mode and natural frequency in the presence of cracks, the thesis focus on the study of diagnosis index of cracks for plate and intelligent diagnosis of cracks using BP neural network.

本文主要依据板有无裂纹的振型和固有频率的变化信息，研究适于板的裂纹诊断指标，在此基础上，采用BP神经网络开展板的裂纹的智能诊断研究。

Fifth, because of the influence of the gyroscopic moment, there is obvious deflection at a plate and vibration mode of the dual-rotors system rotating in the opposite direction is different from that of the dual-rotors system rotating in the same direction.

由于陀螺力矩的影响，使得反向旋转的双转子振型与同向旋转的双转子有较大区别，在高阶振型中轮盘附近会出现明显挠曲，在发动机设计中应引起重视。

The analyzing result reveals that the normal motion behavior of stator surface points is not pure planar elliptic, which breaks the concept of elliptic motion usually assumed by many researchers. On basis of these analyses, the criteria of vibration mode select and optimal design are presented for simple-free and free-free supported stators.

首次提出了定子表面质点非平面椭圆运动行为的一般性，打破了国内外学者经常假设的椭圆驱动轨迹的局限性；以此为基础提出了定子在简支和自由边界条件下的振动模式选择和结构参数优化设计的原则。

Generally,the best efficiency is obtained in second order vibration mode of the fishtail,and the reverse Karman Vortex Street wake is observed with corresponding frequency.

在一般情况下当外磁场以系统的二阶固有频率工作时其工作效率最佳。在此情况下鱼尾摆动产生了推力型反卡门涡街形态的尾迹涡流。

The sensitivity characteristics of the natural vibration frequencies and mode shapes of vibration structures with respect to mass and stiffness modifications are analysed based on the matrix perturbation method of the linear generalized eigenvalue problem.

基于线性广义特征值问题的矩阵摄动重分析公式，较为系统地分析了振动系统各阶固有振频及固有振型随结构质量和刚度的修改的灵敏度特性，得出了一系列具有重要实用意义的结论，指出了对结构进行摄动修改的最灵敏位置。

It concludes that the mode of the linear pe-riodic time-varying vibration system is complex mode and isperiodically time-varying .

通过研究发现，线性周期时变齐次系统的模态不仅具有复模态的性质，而且为周期时变性。

On the knowledge of vibration of polyatomic molecules, it has gonethrough the change of two stages: from normal mode model to local modemodel. In present, there mainly are two methods to deal with this problem:the traditional approach, namely ab initio, based on solving Schr〓dinger equa-tions of molecular vibration, and the algrbraic approach based on group theory.

在对多原子分子振动问题的认识方面，人们经历了从简正模模型到局域模模型转变的过程，而在处理方法上目前主要有两种：基于求解薛定谔方程的从头计算法和基于群论方法的代数方法。

The paper also simulate the vibration response of frame when suspension point were changed, which indicates, through comprehensive consideration with the mode of frame, that it can get better oscillation damping affection to position the suspension points to the node of mode shape.

本文还在模态集成模型上模拟分析了发动机悬置点的变化时车架振动响应，表明通过与车架的模态综合考虑，把发动机的位置变换到车架模态振型的节点位置也有较好的减振效果。

Fist, mode analysis is accomplished, and stiffness influence of the structure by the member parameter and the accessional columns are analysed. Then the numerical value of the pulsoting wind load was used, the time history contrastable analysis between mega-sub controlled structure and general megaframe structure has been accomplished. Finaly, the influence of vibration-controlled efficiency under the different member parameter of vibration-absorption megaframe structure is analysed.

首先进行了模态分析，讨论了钢筋混凝土巨—子型控制结构的主要结构参数及附加柱刚度对结构整体刚度的影响：利用脉动风荷载计算机模拟的荷载值，并对它和一般的巨型框架结构进行了脉动风荷载下的时程对比分析，讨论了钢筋混凝土巨—子型控制结构的主要结构参数对减振效果的影响，研究了钢筋混凝土巨—子型控制结构的动力特性。

It is shown that the first order strain mode shape is sensitive to the damage degree and location of the frame joints. And the existence of vibration node in high order stain vibration shape may lead to misjudging.

结果表明，一阶应变振型对损伤及其位置敏感，高阶应变振型节点的存在使得依据高阶应变模态进行损伤诊断时容易造成误判。

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。