structural perturbation 中文意思是什麼

structural perturbation 解釋
結構擾動
  • structural : adj. 構造上的，結構上的，組織上的。adv. -ly
  • perturbation : n. 1. 慌張，動搖；混亂。2. 狼狽，不安，焦慮。3. 引起不安[混亂]的事物；引起動搖的原因。4. 【天文學】攝動；【物理學】微擾。adj. -al
  1. The third part : according to the verified structural damage identification method and supposing the to - be identified parameters to be independent and have normal distribution, the scheme of identifying bridge structure damage is proposed by using the probability damage identification method. assume the zero - order, the first - order and the second - order perturbation statistics of the frequencies and the mode shapes of the bridge structures are known, and substitute them into the statistics property formulas of the frequencies and the mode shapes, as a result an objective function including the mean values and the variance of all the identified parameters is established. set

    對于連續梁橋，當損傷位置位於跨中附近時，大多數無損傷單元的損傷概率均在10 %左右，可作為小概率事件，不發生損傷，但與損傷單元相鄰的無損傷單元，其損傷概率達到20 %以上，很難被排除，只有對這些單元進行二次識別，才能得到比較可靠的計算結果;如果損傷位於支點附近時，則不會出現上述情況，對于無損傷單元，損傷概率都小於10 % ，不發生損傷，損傷識別結果
  2. Eigenvalue perturbation theory with applications to small structural damage detection

    特徵值攝動法在利用動響應結構小損傷檢測中的應用
  3. By using vector random field model and second - order perturbation method, viscoelastic stochastic finite element formulation is developed, which can take the correlation of random parameters into account and is suitable for stochastic structural analysis with larger variance of the uncertainties

    利用向量隨機場模型和二階隨機攝動方法，給出了相應的粘彈性隨機有限元列式。能夠考慮參數的相關性，更加接近於prony級數的參數測試過程。
  4. Structural robust design based on perturbation stochastic finite element method

    基於隨機有限元的非線性結構穩健性優化設計
  5. Through the approximate handling of geomagnetic intensity and differential riccati equation, the magnetic attitude h control law of the microsatellite in a circle orbit which has external disturb and the structural perturbation is presented

    通過對衛星地磁場和微分riccati方程進行近似處理，給出有外界擾動和結構化攝動圓軌道衛星系統的h _磁姿態控制規律。
  6. Damage tends to be concentrated in a few structural members at the early stage, so the stiffness perturbation matrix tend to be in small rank

    摘要在結構損傷的早期階段，損傷往往集中發生在少數單元，損傷前後總體剛度矩陣差的秩較小。
  7. The structural dynamic sa in project is of great importance for the study on dynamic design, optimization design, control theory and dynamic modification etc. and direct method, difference method and perturbation method for dynamic sa are adopted regular, though following shortages are obvious : only local impact of the factors on the model can be obtained ; model dependence ; the interval is usually the same for all of the variables and is not related to our degree of knowledge of the variables ; shortage of precision and so on

    工程結構的動態特性靈敏度分析對工程結構的動態設計、優化設計、控制理論和動態修改等方面的研究有著十分重要的意義。目前，結構動態特性靈敏度的分析法一般採用局部法，如直接法、差分法和攝動法。但是這些方法只能求參數域某點的靈敏度，不僅受模型、計算精度的限制，而且二階以上的靈敏度求解比較困難。
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