modal expansion 中文意思是什麼
modal expansion
解釋
模態展式-
Comparison of modal function expansion method with eigenfunction expansion method for prediction of hydroelastic responses of vlfs
預報超大型浮體水彈性響應的模態函數展開方法和特徵函數展開方法比較 -
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。 -
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。 -
In this modal pushover analysis, the seismic demand due to individual using the inertia force distribution for each mode. combining these modal demands due to the first two or three terms of the expansion provides an estimate of the total seismic demand on inelastic systems
根據結構動力學原理，提出了首先按各振型的水平地震力進行推覆分析，然後將各振型的推覆分析結果進行組合，得到總地震作用效應。
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