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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(cháng)江大橋結構健康監測信號,提出將經(jīng)驗模態(tài)分解(EMD)與隨機減量技術(shù)(RDT)相結合進(jìn)行結構模態(tài)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.;基于環(huán)境激勵的工作模態(tài)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: 采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(jìn)行模態(tài)參數識別。
- Keywords: VBARX, system identification, state space model, modal parameters. 關(guān)鍵詞:VBARX、系統識別、狀態(tài)空間、模態(tài)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(jìn)一步深入研究能適應大型土木工程結構實(shí)時(shí)健康監測系統需要的模態(tài)參數識別和損傷識別方法具有重要的理論意義和工程實(shí)際應用價(jià)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... 然后以桁架結構為例,通過(guò)隨機振動(dòng)試驗數據求得模態(tài)參數,并與模態(tài)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. 以鉆架模型為實(shí)例,研究了其ODS測試方法試驗模態(tài),識別其模態(tài)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(jìn)行加權組合,建立了多輸入多輸出模態(tài)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于不完全模態(tài)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算法相結合,提出一種基于不完整模態(tài)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. 用信號分析軟件進(jìn)行深松鏟的模態(tài)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(dòng)態(tài)特性的模態(tài)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. 摘要提出了基于環(huán)境激勵下,運用跨點(diǎn)導納法識別大型工程結構模態(tài)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(shí)驗和分析計算表明,MAC可以彌補常用模態(tài)識別方法的不足,使模態(tài)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(diǎn)導納法能夠準確有效地辯識工程結構的模態(tài)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(shí)驗模態(tài)分析中消除附加質(zhì)量、剛度和阻尼對復模態(tài)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. 由于各模態(tài)的參數是從時(shí)頻譜中的峰脊識別而得,而相近模態(tài)頻率在時(shí)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(tài)參數和由振動(dòng)試驗數據求得的頻響函數來(lái)進(jìn)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過(guò)程中截斷及舍入等誤差的存在以及噪聲的影響不能完全克服;采用此方法估計的頻響函數來(lái)識別模態(tài)參數;其精度受到影響.