提出了一个考虑模态噪声影响的基于残余力向量法的损伤识别两步法。
A new two-step damage identification method based on residual force vector considering the impact of measurement error (noise) in most cases is proposed.
通常，人们关心系统的弹性体模态，因为主要是由那些模态导致了我们遇到的所有噪声和振动问题。
Typically, people are concerned about the flexible modes of the system because those are the modes that generally cause all the noise and vibration problems that we encounter.
从理论和试验两个方面分析和研究噪声对识别精度的影响，影响识别精度的因素，以及部分模态成分的模态参数不能够被识别的原因。
The influence of noise on identification precision, the effect factor of the computing precision and the reason of missing estimation some modes were analyzed and discussed.
通过对MB503型木工平刨床进行试验模态和空气动力学的分析，确定了木工平刨床的主要噪声源，并进行了实验验证。
Through the analysis of experimental model and air dynamic of type MB503 wood surface planer, and chief noise source was fixed, and was verified by the experiment.
由于定子的径向振动是开关磁阻电机噪声的主要根源，因此定子振动系统的模态分析是降噪研究的有效手段。
As the radial vibration of stator is the origin of the acoustic noise of SRMs, model analysis of stator vibration is the effective way to the research for low acoustic noise.
本文从理论上论证了观测响应中的噪声对ITD法模态识别精度的影响。
The effect of survey noises on the identification precision of ITD method is analyzed.
这是因为结构以某一阶模态振动时，将在其辐射噪声频谱上出现一个峰值。
Because the structure vibrates at some modal, a vibration peak value will appear at its noise frequency spectrum.
准确计算定子模态和固有频率是降低电机噪声和振动的基础。
Calculation of the stator modal frequencies of an electrical machine accurately is the base of reducing acoustic noise and vibration.
本文介绍了模态声发射检测技术的基本原理、信号特征、噪声剔除和源定位等内容。
This paper introduces modal acoustic emission evaluation technique, including its fundamental principles, signal characteristic, noise rejection and source location etc.
模态中的一部分表示了信号中的噪声，而剩下的部分模态真实反映了信号的频率成分。
Noise in signal was expressed by the partial mode, and signal frequency component was reflected by other modes.
结果表明，研究结构在声辐射模态概念下的噪声特性是船舶降噪研究中的一条新途径。
Results showed that the research under the concept of the acoustic mode is significant in the efforts of reducing the noise level of ships.
用试验模态分析方法测取的系统前1阶模态参数，由于噪声等多种因素的影响，具有一定误差。
There must be errors for the measuring values of the first 1 order data of a system due to the noise and other factors in the Testing Model Analysis.
DT - MRI(简称为dti)是一种比较新的医学图像模态，其成像过程中产生的噪声会降低图像质量，可能对其下一步的处理产生影响。
DT-MRI (or DTI) is a relatively new medical image modality. It's quality degradation caused by noise in the imaging process may result in bad influence on its post-processing steps.
在结合声学试验分析和该车车顶棚、前风挡有限元模态分析的基础上，进行了针对降低车内噪声的改进设计。
Together with the FEM modal analysis of the car's roof panel and windscreen, an improved design is achieved to reduce the interior noise.
进行了模态实验、敲击激振实验、白噪声和地震波输入的振动台实验，以及缆索拉力和振动频率的测试。
The experiments include modal tests, vibration tests by knocking, shaking table tests by inputting white-noises and seismic waves, and tests of cable forces and vibration frequencies.
采用经验公式计算各子系统模态密度，最后利用统计能量法来预报潜艇首部声呐平台区自噪声，得到了令人满意的结果。
The subsystems' mode density is calculated by empirical formulas. Finally, SEA is adopted to predict self-noise in sonar platform area and satisfying results are obtained.
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。
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.
为了准确识别内燃机噪声源，提出了一种声模态分析技术。
A sound mode technology was proposed for exactly identifying an internal combustion engine's noise source.
车室声学模态分析是汽车NVH特性研究的重要内容，识别系统模态对避免声学共振、降低车内噪声有重要意义。
The acoustic modal analysis of cavity is the important matter on vehicle NVH performance study. Identifying system mode is of importance to avoid acoustic resonance and reduce interior noise.
提出了机、电、声三相耦合的噪声智能控制系统的模态控制方法，给出了模态控制器的设计方案。
A modal control method and controller design scheme for intelligent mechanically electrically acoustically coupled noise control system is proposed.
介绍常见的汽车振动噪声隔离技术，其中对能有效防止共振发生的整车模态频率规划表进行详细介绍。
The table of programming natural frequencies which layouts the natural frequencies of all subsystem of the vehicle in the process of design is one of the effective ways to isolate resonance.
并分析结构模态对辐射噪声的贡献量。
Contribution of structural modes to the radiation noise is analyzed.
经过验证发现，基于二维经验模态分解融合后的影像中条带状噪声得到很好的抑制。
The fusion algorithm based on the two-dimensional empirical mode decomposition can effectively remove the belt noise was proved by experiment.
实验结果显示，使用经验模态分解方法在去除噪声，提高信噪比方面具有优越性。
Simulation result shows that the empirical mode decomposition method is at an advantage when denoising and improving SNR.
分析了壳体的固有模态、激励力和声辐射三者之间的关系，这为用主动控制方法降低有限长加筋双层圆柱壳的振动噪声，提供了理论依据。
The vibration and sound radiation from a finite stiffened double cylindrical shell driven by a point force on the shell surface in the radial direction are studied in this paper.
为了预测车轮辐射的滚动噪声，本文建立了车轮有限元模型，对车轮进行了模态分析，并运用模态叠加方法计算了车轮的径向导纳。
To predict the wheel's noise radiation, a FEM analysis model of the wheel is developed. Based on the modal superposition method, the radial receptance of the wheel is calculated.
提取了隔声罩的振动模态，分析了厚度和阻尼对隔声罩噪声辐射的影响。
The influence of the cover thickness and the damping layer on the noise reduction effect of the sound insulation cover is analyzed.
噪声对高阶模态的识别影响比低价模态大，对阻尼比的识别影响比频率大。
The influence on high order modes is larger than the low order modes, and the influence on damping ratio is larger than the frequency.
在无噪声的情况下，使用任意一阶模态数据，残余力向量法都能够对损伤进行准确定位。
The first step identifies the location of the possible damaged poles by analyzing the joint residual force vector.
基于模态修改法优化主要振动区域腹部节点的速度来降低车内噪声。
Based on modes modification method, the acoustic pressure is found and reduced by optimizing the velocity of the nodal point in main vibrant area.
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