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- Abstract: The empirical mode decomposition (EMD) combined with the random decrement technique (RDT) was pro-posed for structural modal parameter identification. 摘要结合南京长江大桥结构健康监测信号，提出将经验模态分解(EMD)与随机减量技术(RDT)相结合进行结构模态参数识别的方法。
- LI Zhongfu, HUA Hongxing, SONG Hanwen, et al. Operating modal parameter identification under ambient excitation [J]. Journal of Shanghai Jiaotong University, 2001(8)：1 167-1 171. 李中付;华宏星;宋汉文;等.;基于环境激励的工作模态参数识别[J]
- Abstract: The modal parameter identification was contrastively carried out to test the components of AZ91D magnesium alloy and A380 aluminum alloy with the same structure. 摘 要: 采用多参考最小二乘复频法对具有相同结构的AZ91D镁合金试件和A380铝合金试件进行模态参数识别。
- Keywords: VBARX, system identification, state space model, modal parameters. 关键词：VBARX、系统识别、状态空间、模态参数。
- It confines the function of the SHM system. Therefore, the further research of modal parameter identification (MPI) and DI method adapting the need of on-line SHM system has the important theoretical significance and engineering practical value. 因此，进一步深入研究能适应大型土木工程结构实时健康监测系统需要的模态参数识别和损伤识别方法具有重要的理论意义和工程实际应用价值。
- In this paper,the modal parameter is obtained from the datas of random vibration test of a trussed frame,and comparison with the results of the modal test is given.The feasibility of the i... 然后以桁架结构为例,通过随机振动试验数据求得模态参数,并与模态试验的结果相比较,证明该方法的可行性。
- Take model of drill pipe frame as a example, experimental modal based on ODS's testing method is studied and the modal parameter is distinguished and the testing results are analyzed. 以钻架模型为实例，研究了其ODS测试方法试验模态，识别其模态参数，分析其测试结果。
- A concept of global frequency response function(GFRF) has been presented. The MIMO modal parameter identification modal has been established,based on the weighting sum of modal shape squares. 提出了整体频响函数的新概念（GFRF）．以振型平方和的形式对全部频响函数进行加权组合，建立了多输入多输出模态参数的识别模型。
- In this paper, the empirical genetic-simplex algorithm is applied to structural physical parameter identification based on incomplete modal parameters. 本文将这一方法应用于不完全模态参数已知条件下的结构物理参数识别研究。
- The change can be represented in terms of either the modal parameters or the structural parameters. 文中将柔度投影法和遗传算法相结合，提出一种基于不完整模态数据的结构损伤定位和定量评估的两阶段法。
- The modal parameters of the sub-soiling shovel were identified by signal analysis software. 用信号分析软件进行深松铲的模态参数识别。
- Using the principle of mode superposition, the formula is given for finding the modal parameters. 利用振型叠加原理，求得整机的动态特性的模态参数表达式。
- A method of cross-point admittance based on ambient excitation to identify large engineering structures modal parameters was reported in this paper. 摘要提出了基于环境激励下，运用跨点导纳法识别大型工程结构模态参数的一种方法。
- The experiments and analysis show that MAC can make the normal modal identifying methods more complete,and quantify the accessing of modal parameters. 实验和分析计算表明，MAC可以弥补常用模态识别方法的不足，使模态参数的评估定量化。
- Numerical results show that the iterative algorithm converges fast and the precise results of modal parameters can be obtained. 数值结果表明，该算法的参数辨识精度高且结果收敛迅速。
- The analysis of this paper indicated modal parameters of engineering structures can be given exactly and validly with cites point admittance theory. 分析表明跨点导纳法能够准确有效地辩识工程结构的模态参数。
- This paper presents a method to eliminate the effects of additive masses, stiffnesses and dampings on the complex modal parameters in experimental modal analysis. 本文提供了在实验模态分析中消除附加质量、刚度和阻尼对复模态参数影响的方法。
- As the modal parameters are identified from the ridges, and the close modes will interfere with each other and affect the result of modal identification. 由于各模态的参数是从时频谱中的峰脊识别而得，而相近模态频率在时频解析图中又容易互相干扰而影响识别结果。
- 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。
- As the result of limited frequency resolution in the course of FFT and the noise,the accuracy of modal parameters identification is influenced by the frequency response function estimation. 由于FFT过程中截断及舍入等误差的存在以及噪声的影响不能完全克服;采用此方法估计的频响函数来识别模态参数;其精度受到影响.
