教師資料查詢 | 類別: 會議論文 | 教師: 王怡仁 Wang Yi-ren (瀏覽個人網頁)

標題:Aeroelastic analysis of rocket structural vibrations
學年108
學期1
發表日期2019/10/11
作品名稱Aeroelastic analysis of rocket structural vibrations
作品名稱(其他語言)
著者Yun-Shuo Chang and Yi-Ren Wang
作品所屬單位
出版者
會議名稱The 4th International Conference in Aerospace for Young Scientists (2019
會議地點Beihang University, Beijing, P.R.China.
摘要Abstract:Studies of structural vibrations have always been a concern for researchers and engineers
because it may cause the structure fatigue or failure. This study considered a free-free beam
with cubic nonlinearities, which subjected to the distributed load with the wind pressure and its
associated unsteady aerodynamic force. There is a wide range of applications of this study such as
rocket structure, satellite, etc.Thepurpose of thisresearch is to find whether there is an internal
resonance (I.R.) in the system. We analyzed this nonlinear system by the method of multiple scales
(a perturbationtechnique);the equations of motion in different time scales were transferred into
linear equations. Wethen utilized thefixed point plots (steady state frequency response) to
examinethe internal resonance of the system. From the results of the fixed point plots, we found that
there exists energy transferbetween y and zdegree of freedom (DOF) of the beam in
specific conditions, as shown in Fig. 1. This phenomenon might cause the system occur primary
resonance (P.R.), which was the special case of the internal resonance. Fig. 1 shows that when the
dimensionless wind pressure q~ equals 8(Mach number = 2), the primary resonanceoccurs. When the
y-DOF is excited, the z-DOF has larger response amplitude than the y-DOF. Finally, we used the
numerical method, fourth-order Runge-Kutta method, to verify the results of frequency response and the internal resonance.
關鍵字Keywords: nonlinear vibrations,internal resonance, perturbation technique, unsteady aerodynamics.
語言英文(美國)
收錄於
會議性質國際
校內研討會地點
研討會時間20191011~20191012
通訊作者
國別中國
公開徵稿
出版型式
出處The 4th International Conference in Aerospace for Young Scientists (2019
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