modal transformation 中文意思是什麼

modal transformation 解釋
模態變換
  • modal : adj 1 方式上的，形態上的；【哲學】（對本質、內容說的）形式（上）的。2 【語法】語氣 （mood） 的;表...
  • transformation : n 轉變，變化；變形；【生物學】（尤指昆蟲的）轉化，變態，改造，改革；變質；【數學】變換；【電學】...
  1. Then fourier transformation is employed to solve equations of motion of the rings, bulkheads, stringers and fluid respectively, with their reactions ( moments ) expanded by the shell ' s in - vacuo modes. by means of continuity conditions on the interfaces between the shell and the stiffeners as well as the fluid, and inverse fourier transformation, the modal reactions ( moments ) are finally expressed by the shell ' s modal velocities

    然後用fourier變換分別求解環肋、艙壁、縱骨和流場的運動方程，將它們對殼體的作用力（力矩）用殼體周向模態展開，利用它們與殼體在連接處位移連續條件以及fourier逆變換得到用殼體速度表示的模態相互作用力（力矩） 。
  2. Basing on rc simple supported beam the study of the paper is modal analysis using the finite unit software ansys, and the relationship among the transformation of vibration frequency, value of attached load, position of attached load, degree of damage, position of damage is discussed

    本文利用大型有限元軟體ansys針對工程常用的鋼筋混凝土梁橋進行了模態分析，討論了振動頻率的變化與附加荷載大小、附加荷載位置、破損程度、破損位置之間的關系，研究了混凝土梁橋從完整階段到破壞階段振動頻率的變化規律。
  3. Investment in and business invitation for the modal transformation of the yanta new cultural center will stay valid for a long period of time

    雁塔文化新天地文化形態轉化投資與招商（洽談會）長期有效！
  4. A powerful tool of dynamical system analysis named normal form method is presented in this dissertation, and then it was used to analyze oscillation phenomena in interconnected power grids. using nonlinear coordinate transformation of normal forms, a fully described power system can be converted to an equivalent reduced order model, which can still use the conventional modal analysis of small signal stability problems

    論文將動力系統非線性分析的正規形理論應用於互聯系統低頻振蕩分析中，利用正規形方法的非線性坐標變換，將高階電力系統轉化為等價的低階系統，在保留非線性信息的同時，使其仍然可以使用常規小信號穩定研究的模式分析方法。
  5. The submarine structure is simplified to single or double infinite cylindrical shell stiffened with rings, bulkheads and stringers, focusing on underwater sound radiation from the single shell. the shell motion is described by donnell ' s theory including excitation forces and reactions of rings, bulkheads, stringers and fluid, which leads to the fluid - structure coupling vibration equation. expressing displacements by velocities, applying modal expansion circumferentially and fourier transformation longitudinally result in the shell ' s modal equations of motion

    殼體的運動方程採用較為簡單的donnell理論描述，運動方程中包括了激勵力、加筋結構（環肋、艙壁和縱骨）和流場對殼體的作用力，從而組成流場-結構的耦合振動方程，並進一步將方程中的位移用速度表示，然後沿軸線方向進行fourier變換，將速度和各項荷載沿圓周方向進行模態展開，得到了殼體振動的模態運動方程。
  6. In chapter 3, the non - linear equation was linearized with the jacobi matrix, and then the linearized equation was transformed into fixed frame to analyze the stability problem with eigenvalue method ( on - ground or hovering ) or floquet theory ( forward flight ). meanwhile, the equation was perturbed by sweep frequency excitation from steady state to get transit decay of lag response which was then transformed into fixed frame with a numerical fourier coordination transformation ( fct ). the fixed frame response along with the body response was analyzed via an fft to determine modal frequencies

    然後，在穩態響應的基礎上利用雅各比矩陣對非線性方程進行了線化，線化后的方程利用多槳葉坐標變換轉換到固定系下后，利用直接特徵值分析（地面、懸停）或floquet理論（前飛）對系統進行了穩定性分析;同時，對系統進行了瞬態響應分析;在系統達到穩態的基礎上進行掃頻激勵，用fft變換求得系統頻率，進而用移動矩形窗方法分析得到系統的阻尼。
  7. In the paper, firstly, present the formulation and application of proper orthogonal decomposition of covariance and cross - power spectral density matrices are presented in the analysis of wind load effects on structures. then the dynamic response of linear structures subjected to random loads is analyzed by a technique called double modal transformation ( dmt ) that is expressed through a double series whose terms depend on structural and loading modes

    本論文中首先通過求相關矩陣和互功率譜密度矩陣特徵值問題給出了本徵正交分解的公式，並利用pod與結構模態相結合的雙模態方法來分析結構的動態響應，主要討論了截斷高階荷載模態對風致響應的影響。
  8. The main work of this thesis includes two aspects : ( 1 ) modal identification based on wavelet transformation a equation of hard threshold wavelet de - noise is reasoned out from mse function

    本文的主要工作分為兩個方面： （ 1 ）基於小波分析的模態識別根據最小均方差（ mse ）函數，本文推導了一個硬閾值小波消噪方程式。
  9. The existing problems of eve are also analyzed, the new developments, such as flexible clamp, simulation of the dynamic boundary conditions of a specimen, modal parameter identification by vibration shaker, modal transformation of structure are introduced briefly

    分析環境振動實驗當前存在的問題，對柔性夾具、試件動力學邊界條件的工程實現、振動臺模態參數識別、結構的模態轉換等新進展做簡要介紹。
  10. Theoretical tendency and modal transformation of social criticism in the 20th century

    20世紀社會批評的理論趨向及範式轉換
  11. Based on the assumption of periodic rubbing force in rotor system, the rubbing forces onto each node of rotor system are estimated by modal expansion technique and the sub - harmonic decomposition of residual matrix between faulty and faulty - free vibration signals of rotor system through fft ( fast fourier transformation )

    基於轉子系統碰摩力的周期性假設，利用模態擴展方法，對故障和健康轉子系統振動信號的殘差矩陣進行傅立葉級數的分頻諧波近似，估算得到轉子軸承各節點的碰摩力。
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