Understanding the mode shape and how the structure will vibrate when excited helps the design engineer to design better structures.
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。
The process determines (704) an estimated mode shape based on the values for the flow tube and fluid parameters.
过程根据流管和流体参数的值确定(704)一个估计模态。
We can quickly see that some of the mode shape information is strongly controlled by the exterior of the structure.
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。
Hereby, the change ratio of the first order mode shape is presented as the indicator for structure damage detection.
提出以第一阶振型改变率作为结构损伤识别的标识量。
When the springs supporting the beam are very soft, then the mode shape for the beam looks very much like a rigid body.
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。
Finally, many complex mode shape derivatives of high accuracy can be obtained by decomposing system matrices only once.
该方法仅需进行一次系统矩阵的分解就可获得高精度的多个复振型导数。
Natural vibration characteristic of gun tube was analyzed triumphantly. Vibration frequency and mode shape were obtained.
对某火炮身管固有振动特性进行了分析，计算得到了振动频率和振型。
The damping factor of the most unstable mode shape of mistuned blade system is chosen as the cost function of optimization.
选取非均匀叶片系统中最不稳定振型的阻尼因子作为优化模型的目标函数。
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。
Curvature mode shape can indicate the presence of initial damage and its severity, and locate initial damage of a structure effectively.
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。
Basically the simplest answer is that you need to measure a sufficient number of points so that you can uniquely describe the mode shape.
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。
With applications to a three-span continuous beam bridge, the comparative of some methods of mode shape expansion and updating is researched.
针对某三跨连续梁桥，对几种振型扩展与修正的方法进行了比较研究。
The mode shape of the system is different from that of the structure on the fixed base in that there are rocking and swing at the foundation.
体系的振型曲线与刚性地基上结构的振型曲线不同，基础处存在平动和转动。
The results show that the present method can identify the mode shape accurately and complement the use of PRCE under unknown excitation condition.
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 mode shape function of the pier was offered to study the dynamic deformation feature of the continuous beam bridge sited on the elastic foundation.
为了研究弹性基础上连续梁的振动特性，提出了连续梁桥墩的振型函数表达式。
This paper gives a theoretical formulation for the extraction of mode shape by fitting the cross power spectra of the outputs and a cantilever beam is analysed.
该文提出了一种用互功率谱求振型的方法，并对此理论进行了详细推导，以一悬臂梁为例对该方法进行了试验验证。
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.
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。
FEM Model is made and programmed in MATLAB, reasonable size is worked out, relation between frequency and density is analyzed, and the vibratory mode shape is given.
用有限元法建立了圆筒谐振子的模型，通过MATLAB软件编程，计算出合理的谐振子参数，对其频率密度特性进行了分析，并给出了振子的振型分布。
Using MATLAB6.5 BP neural network toolbox, compiles the structural damage detection process with the input parameters based on the modal parameters of frequency and mode shape.
以MATLAB6.5BP神经网络工具箱为基础，编写了基于频率平方变化和振型模态分量为输入参数的BP神经网络结构损伤识别程序。
Therefore, through structural modal analysis with different damage degree using ANSYS, get natural frequencies and mode shape data as neural network input vector after unitary.
因此，通过有限元软件ANSYS对具有各种损伤程度的结构进行模态分析，得到固有频率和模态分量的数据，经过归一化处理后作为神经网络的输入向量。
The natural frequency, damping ratio and mode shape of a multi-degree-of-freedom system are analyzed and the identified results are in good agreement with the theoretical values.
并针对一多自由度系统具体论述了固有频率、阻尼比和振型的识别方法，识别结果与理论结果吻合较好。
At first the authors, construct a substructure synthesis method that can be used to set up the connection between measurement mode shape parameters and the damaged substructures.
首先，构造一种能建立测量模态参数与损伤子结构之间关系的子结构综合法。
Some useful results were obtained by a numerical simulation of a 10-story shear-type frame structure. Damage can not be located correctly through the changes in mode shape curvature.
通过一个10层剪切型框架结构的数值分析表明，振型曲率的改变不能正确识别结构损伤位置；
The paper gives a new concept generalized strain energy density (GSED). It is based on the strain mode frequency and mode shape. It is very effective and its physical meaning is clear.
本文基于应变模态的工作，利用应变模态识别得到的振型和频率结果，提出广义应变比能（GSED）的概念。
Based on the piers mode shape function, this paper studied the methodology of structure ductility coefficient by modal test and the procedure of the structures inelastic seismic force.
以桥墩的基本振型函数为基础，推导出基于试验动力参数的在役桥梁结构延性系数的计算公式，并给出了结构非弹性地震力的求解方法。
The second chapter introduces the basic principle and the correlation knowledge of moving load identification, including mode shape orthogonality, mode superposition principle and so on.
第二章介绍了移动荷载识别的基本原理和相关知识，包括振型的正交性，模态叠加原理等。
In this paper, based on the analysis of preceding research, a parameter, called mode shape curvature ratio, is put forward for damage identification of reinforced concrete framed structure.
本文在分析以往研究成果的基础上，找到了一个基于曲率模态的对钢筋混凝土框架结构损伤识别有效的参数——振型曲率比。
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。
If we don't measure enough information to fully describe the mode shape, then it may be very difficult to determine what the cause of the problem is when we blindly limit the data we look at.
如果没有测量足够多的信息来充分地描述模态振型，当盲目地局限于所观察的数据的时候，或许很难确定问题的原因是什么。
If we don't measure enough information to fully describe the mode shape, then it may be very difficult to determine what the cause of the problem is when we blindly limit the data we look at.
如果没有测量足够多的信息来充分地描述模态振型，当盲目地局限于所观察的数据的时候，或许很难确定问题的原因是什么。
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