The goal of a modal test is to extract the accurate dynamic system characteristics.
模态试验的目的是要提取准确的系统动力学特性。
In this paper, a modal test method for quality evaluation of masonry structures is presented.
给出了一种砌体结构质量的振动模态检测方法。
So what would ever posses anyone to perform a modal test using an operating random excitation.
那么是什么让人想到要用工作随机激励来进行模态试验？
It can obtain mistuned frequency difference of blades by a modal test, and then get the mistuned parameters.
本文通过叶片模态试验获得叶片失谐频差，进而获得叶片失谐参数。
With common modal test method of structure, a modal test is carried out in some locomotive car body steel structure.
文章主要介绍了一种比较常用的模态试验方法和某型电力机车车体钢结构模态试验。
Now when a modal test is performed, typically all of the measurements are acquired relative to a particular reference.
那么当进行模态试验时，通常情况下是相对于一个特定的参考点采集所有的测量结果。
Now most times people don't measure the rigid body modes in test and they don't include them as part of the flexible modes measured during a modal test.
现在大多数时候，人们在试验中不测量刚体模态，并且在模态试验过程中，他们不包含刚体模态作为测量的弹性体模态的组成部分。
Finally, Based the analysis of theory modal, a modal testing program has been designed according to the existing test equipments, which prepares for the next testing of the vibration and noise.
在理论模态分析的基础上，根据现有的试验设备设计了合理的试验方案，为下步的振动与噪声的试验做了必要的理论准备。
This is a common problem in performing any modal test.
这是一个进行任何模态测试时的普遍问题。
A good example of this brings to mind a recent modal test on a troublesome torsional vibration shaker system.
这个很好的例子使我想起了近期的一次模态试验，试验是在一个棘手的扭转振动台系统上进行的。
The test modal analysis is an effective means to identify the intrinsic attribute of a mechanical structure.
试验模态分析是识别机械结构系统固有特性的一种常用、有效的现代技术。
This paper presents a synthesized model updating method using the modal parameters and frequency response functions(FRF) extracted from the vibration test data.
文章提出了一种利用模态参数和由振动试验数据求得的频响函数来进行模型修正的方法。
A brief overview and assessment on the supporting methods for the modal test of large-Sized launch Vehicle are presented.
本文对大型运载器模态试验采用的支承方法作了简要综述与评价。
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.
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。
A test modal analysis of the damage about the shaft structure components is analyzed by the pulse-excitation method.
利用脉冲激励法对轴结构件损伤状况进行了试验模态分析。
The tire modal test and its application to the tire structure design were analysed, and a tire modal analysing test system was established.
分析了轮胎模态分析的试验方法及其在轮胎设计中的应用，并建立了轮胎模态分析试验系统。
A test method of measuring rigid modal behavior of column rotor helicopter on landing gear is suggested in this paper.
本文基于模态分析理论和试验技术，提出了一套测定纵列式旋翼直升机在起落架上的刚体模态特性试验方法。
Modal test and parameter identification of a wind tunnel flutter model simulating a wing with external missiles are presented in this paper.
本文介绍了带外挂风洞颤振模型模态试验与参数识别方法。
Modal test and parameter identification of a wind tunnel flutter model, similar to a wing with external missiles, are presented in this paper.
本文介绍了带外挂风洞颤振模型模态试验与参数识别方法。
It is necessary and useful in engineering to modify a finite element model or some elements of mass and stiffness matrix by using modal test results.
利用试验模态分析结果，对有限元力学模型本身或其中某些参数进行修改是必要的和有工程意义的。
A practical procedure of Double-Least-Square approach in ITD method of modal parameters is programed and the simulataneous identification test is conducted.
本文编制了模态参数时域识别的双最小二乘法程序，并进行了模拟试验。
Modal test was done on a cable-stayed structure in its healthy and two damaged conditions. Curvature of the Frequency Response Function (FRF) was used to detect the location of damage.
对一拉索结构的正常状态及两种损伤状态进行了模态测试，用频响函数的曲率来进行损伤检测。
The method is used to identify modal parameters of a satellite. Comparing with the modal test, the results are fairly well, which shows the validity of identifying modal parameters using sine…
并利用该方法对某型号卫星进行模态参数识别，与模态试验相比，结果比较理想，从而实现了利用正弦振动试验的数据提取模态参数的目的。
Ambient vibration test is the main method of detecting a large bridge structure, Modal parameters is important to determine the health status of the bridge.
环境振动试验是检测大型桥梁结构的主要方法，检测得到的模态参数是判定桥梁健康状况的重要依据。
Through building a 1:10 model of spring vibration isolated turbine-generator foundation, this paper study it by modal test.
本文通过设计制作1：10模型对汽轮机发电机组弹簧隔振基础进行试验研究。
Meanwhile, the modal analysis is used to test the detection arm's natural frequency and structural vibration modes, which provides a reference for the stability test of the bridge inspection vehicle.
同时对检测臂进行了模态分析，测出了其固有频率和结构振型，为检测车工作时的稳定性要求提供了参考。
For large scale free structure with very great weight, such as a large and heavy-duty launch-vehicle, the free-free modal test is realized difficultly.
对于大型自由结构，如大型运载器，要实现自由状态下的模态试验是愈来愈困难了。为此，人们被迫只好对这类结构进行约束状态下的模态试验。
What is presented in this paper is a method of finite element model updating via design parameters using test modal data.
本文提出了一种设计参数型的有限元模型修正方法。
Vibration characteristic was calculated by using finite element transfer matrix method of multibody system and modal test was completed for a certain naval gun.
使用有限元传递矩阵法分析了某大长径比弹箭的固有振动特性，成功求得了其固有振动频率和振型函数，计算结果得到试验验证。
Vibration characteristic was calculated by using finite element transfer matrix method of multibody system and modal test was completed for a certain naval gun.
使用有限元传递矩阵法分析了某大长径比弹箭的固有振动特性，成功求得了其固有振动频率和振型函数，计算结果得到试验验证。
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