double-fluid theory 中文意思是什麼

double-fluid theory 解釋
二流體理論
  • double : adj 1 兩倍的,加倍的。2 雙的,二重的,雙重的;對,雙,兩,復。3 雙人用的;折疊式的。4 (意義)雙...
  • fluid : n 流體,液。 body fluid 體液。 cooling fluid 冷卻液。adj 1 流動的;流體的;液體的。2 容易[可]變動...
  • theory : n. 1. 理論,學理,原理。2. 學說,論說 (opp. hypothesis)。3. 推測,揣度。4. 〈口語〉見解,意見。
  1. 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。
  2. The control theory method only needs double time of the fluid field computation to obtain the global gradients, through solving the adjoint equations of the governing equations

    通過求解共軛方程來得到目標函數對于設計變量的梯度,再利用所求的梯度進行優化設計,只需要花費兩倍求解流場的時間。
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