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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. 摘要結合南京長江大橋結構健康監測信號，提出將經驗模態分解(EMD)與隨機減量技術(RDT)相結合進行結構模態參數識別的方法。
- 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;華宏星;宋漢文;等.;基於環境激勵的工作模態參數識別[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: 採用多參考最小二乘復頻法對具有相同結構的AZ91D鎂合金試件和A380鋁合金試件進行模態參數識別。
- Keywords: VBARX, system identification, state space model, modal parameters. 關鍵詞：VBARX、系統識別、狀態空間、模態參數。
- 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，進一步深入研究能適應大型土木工程結構實時健康監測系統需要的模態參數識別和損傷識別方法具有重要的理論意義和工程實際應用價值。
- 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... 然後以桁架結構為例,通過隨機振動試驗數據求得模態參數,並與模態試驗的結果相比較,證明該方法的可行性。
- 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. 以鑽架模型為實例，研究了其ODS測試方法試驗模態，識別其模態參數，分析其測試結果。
- 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. 提出了整體頻響函數的新概念（GFRF）．以振型平方和的形式對全部頻響函數進行加權組合，建立了多輸入多輸出模態參數的識別模型。
- In this paper, the empirical genetic-simplex algorithm is applied to structural physical parameter identification based on incomplete modal parameters. 本文將這一方法應用於不完全模態參數已知條件下的結構物理參數識別研究。
- The change can be represented in terms of either the modal parameters or the structural parameters. 文中將柔度投影法和遺傳演算法相結合，提出一種基於不完整模態數據的結構損傷定位和定量評估的兩階段法。
- The modal parameters of the sub-soiling shovel were identified by signal analysis software. 用信號分析軟體進行深松鏟的模態參數識別。
- Using the principle of mode superposition, the formula is given for finding the modal parameters. 利用振型疊加原理，求得整機的動態特性的模態參數表達式。
- A method of cross-point admittance based on ambient excitation to identify large engineering structures modal parameters was reported in this paper. 摘要提出了基於環境激勵下，運用跨點導納法識別大型工程結構模態參數的一種方法。
- The experiments and analysis show that MAC can make the normal modal identifying methods more complete,and quantify the accessing of modal parameters. 實驗和分析計算表明，MAC可以彌補常用模態識別方法的不足，使模態參數的評估定量化。
- Numerical results show that the iterative algorithm converges fast and the precise results of modal parameters can be obtained. 數值結果表明，該演算法的參數辨識精度高且結果收斂迅速。
- The analysis of this paper indicated modal parameters of engineering structures can be given exactly and validly with cites point admittance theory. 分析表明跨點導納法能夠準確有效地辯識工程結構的模態參數。
- This paper presents a method to eliminate the effects of additive masses, stiffnesses and dampings on the complex modal parameters in experimental modal analysis. 本文提供了在實驗模態分析中消除附加質量、剛度和阻尼對復模態參數影響的方法。
- 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. 由於各模態的參數是從時頻譜中的峰脊識別而得，而相近模態頻率在時頻解析圖中又容易互相干擾而影響識別結果。
- This paper presents a synthesized model updating method using the modal parameters and frequency response functions(FRF) extracted from the vibration test data. 文章提出了一種利用模態參數和由振動試驗數據求得的頻響函數來進行模型修正的方法。
- 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. 由於FFT過程中截斷及舍入等誤差的存在以及雜訊的影響不能完全克服;採用此方法估計的頻響函數來識別模態參數;其精度受到影響.
