艙肋骨 的英文怎麼說
中文拼音 [cānglèigǔ]
艙肋骨
英文
hold frame-
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） 。In the end of this thesis, basis on the structure dimension of a specifically submarine, some solutions for strengthening structure are discussed, such as increasing the thickness of shell, reducing the spacing of frames, increasing the bending inertial moments of frame and setting the intermediate stiffer, when the extreme diving depth becomes 450m or 600m. comparing these structure weights, the excellent solution is the lightest structure
本文最後以某核潛艇指揮艙的結構形式作為計算實例，對下潛深度分別增加到450米和600米的情況，選擇增加殼板厚度、縮小肋骨間距、增加肋骨尺寸以及加設中間支骨等加強方案，經分析確定其中結構重量最輕的方案為最佳設計方案。These four ship ' s class societies all use two holds length finite element modal near the central section. they mesh the finite element modal mainly according to the distance of longitudinal frames, we call this fine mesh finite element modal. the elements in the modal are mainly shells and beams
這四家船級社相同之處是都採用了船舯附近的兩艙段長的有限元計算模型，有限元模型單元的劃分主要依據縱骨間距和肋距，即所謂的細網格模型，結構單元以板殼單元和梁元居多。A lot of oil tanker failure was reported in recent years, which attracted much attention of navigation industry. after investigation and analysis, fatigue crack was suspected to be one of main causes. the fatigue cracks were discovered mostly on the side longitudinals at the connections to transverse bulkheads or transverse webs
近年來，世界上有大量的油輪在海上失事，這一現象引起了各國航運界的高度重視，通過組織力量對油輪失事原因進行調查分析，認為一個重要的原因是艙內肋骨與上下翼艙的連接處的疲勞強度不足，導致艙室進水，然後波紋橫艙壁破壞導致進水過多而沉沒。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。Tank side frame
液艙側肋骨分享友人