当支撑梁的弹簧非常软时，梁的模态振型看起来非常像刚体。
When the springs supporting the beam are very soft, then the mode shape for the beam looks very much like a rigid body.
通过计算得到前十阶固有频率，并分析了低阶固有模态振型。
Ten orders 'natural frequencies had been calculated and low-order vibration shape of the body structure was studied.
曲率模态振型可以有效地确定结构早期损伤的存在、程度和位置。
Curvature mode shape can indicate the presence of initial damage and its severity, and locate initial damage of a structure effectively.
我们很快可以发现，某些模态振型信息是由结构外部极大地支配的。
We can quickly see that some of the mode shape information is strongly controlled by the exterior of the structure.
研究了适用于桥梁和连续梁结构的基于曲率模态振型的损伤识别方法。
A damage identification approach applied aptly in Bridges and continuous beams, based on the curvature mode shapes, was studied in this paper.
开发的程序可以计算转子各阶模态振型与临界转速，进行稳定性的分析。
The program can calculate modal shapes and critical speeds, analyze the stability of the rotor system.
唯一的要求是，相对于那阶模态振型来说，模态振型应该具有显著的数值；
The only requirement is that the mode shape should have a significant value in relation to its mode shape;
分别计算出了谐调和失谐情况下的模态振型，并对计算结果进行分析讨论。
The mode shapes of the tuned and the mistuned are calculated and the results are analysed.
介绍了某型燃气轮机转子模态试验，试验测得转子静态固有频率和模态振型。
This paper takes a type gas turbine rotor as an example to analyze its natural frequency and modal shape.
理解模态振型和受激结构如何振动，将有助于设计工程师设计出更优的结构。
Understanding the mode shape and how the structure will vibrate when excited helps the design engineer to design better structures.
试验模态分析中，要获得完整的模态振型，需要在所有自由度方向都进行测量。
In experimental modal analysis, it is necessary to measure the response data in directions of all degrees of freedom to obtain the complete mode shape information.
我们用一个简单的结构来开始这个讨论，这个结构实际上具有确定方向的模态振型。
Let's start this discussion with a simple structure that has mode shapes that are very directional in nature.
提出了利用模态频率、模态振型和模态柔度组合指标作为神经网络修正的输入参数。
And we suggest that mode frequencies, mode shapes and mode flexibility are regarded as input parameters of neural network modification.
提出了利用模态频率、模态振型和模态柔度组合指标作为神经网络修正的输入参数。
The mode flexibility and the mode frequency were introduced to the input parameter of neural network system.
并用此方法测量了双线性振动陀螺的固有频率、品质因子、—阶模态振型和杨氏模量。
The natural frequency, quality factor, first mode of fold beam and Young's modulus of the double linear vibratory gyroscope were measured by the new setup.
从图示的模态振型中，我们现在可以看出，有足够数量的点来描述每一阶模态的振型。
Now from the mode shapes shown we can see that there are sufficient number of points to describe the mode shape for each mode. But there are a total of 45 measurement locations on this plate.
大致说来最简单的回答是，你需要测量足够多的点，这样你就可以唯一地描述模态振型了。
Basically the simplest answer is that you need to measure a sufficient number of points so that you can uniquely describe the mode shape.
从根本上讲，这些特性依赖于结构的质量和刚度，它决定了固有频率和模态振型何处存在。
Basically, there are characteristics that depend on the weight and stiffness of my structure which determine where these natural frequencies and mode shapes will exist.
建立曲轴连杆组合结构模型，进行有限元计算得出曲轴连杆组合结构的固有频率和模态振型。
Calculate the finite element mode of the complex combined structures in the load case and get the result of the theory calculation.
本讲义的重点，是说明频响函数（FRF）测量结果是如何与结构模态振型和振动频率建立联系的。
The major point of the text is to show how frequency responsefunction (FRF) measurements are related to the structure's mode shapes and vibrational frequencies.
刚度的减小自然伴随结构自然频率的减小和结构模态振型的转变，相应结构的动力响应也会出现转变。
With the reduction of natural frequency stiffness and transformation of modal shape structure, the corresponding of the structure can also be changed.
的固有频率，阻尼比，模态振型，最大位移和破坏财产的系统进行了计算和分析的基础上的振动台试验。
The natural frequency, damping ratio, mode shapes, maximum displacement and failure property of the system were calculated and analyzed based on shaking table test.
采用有限元法分析滚珠轴承和磁浮轴承—转子系统，获得相应线性系统的固有频率和模态振型等动态特征量。
Using the finite element methods to study the natural and linear bearing EMBR system, the inherent frequencies and modes are obtained.
通过模态试验，可以计算出结构的固有频率、模态振型、阻尼比等参数，为结构设计与优化打下坚实的基础。
Eigenfrequency, vibration pattern and damping ratio can be got by modal experiment. Then, these parameters can be used to structural design and optimization.
结果表明，采用该方法能够有效地识别出模态振型，从而弥补了复指数法在未知激励下进行模态分析的不足。
The results show that the present method can identify the mode shape accurately and complement the use of PRCE under unknown exci…
结果表明，采用该方法能够有效地识别出模态振型，从而弥补了复指数法在未知激励下进行模态分析的不足。
The results show that the present method can identify the mode shape accurately and complement the use of PRCE under unknown excitation condition.
其次对一摩托车架进行了试验模态分析，试验表明仪器能较好地分析出车架的多阶模态，并显示出其模态振型。
The second test aims to a motor frame, we can conclude from the experiment that the instrument can analyze multiple modes of complex structure and display its modal vibration shapes.
本文基于模态振型，提出一个新的用于结构损伤识别的参数——振型曲率比，并将之作为神经网络的输入向量。
In this paper, based on mode shape, the author put forward a new parameter-mode shape curvature ratio for detecting structure damages. And it is also the input vector of the neural network.
本文基于模态振型，提出一个新的用于结构损伤识别的参数——振型曲率比，并将之作为神经网络的输入向量。
In this paper, based on mode shape, the author put forward a new parameter-mode shape curvature ratio for detecting structure damages. And it is also the input vector of the neural network.
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