Aeroelastic analysis of rocket structural vibrations
學年 108
學期 1
發表日期 2019-10-12
作品名稱 Aeroelastic analysis of rocket structural vibrations
作品名稱（其他語言）
著者 Yun-Shuo Chang; 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 Beijing, P.R.China
摘要 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 nonlinear vibrations;internal resonance;perturbation technique;unsteady aerodynamics
語言 en_US
收錄於
會議性質 國際
校內研討會地點 無
研討會時間 20191012~20191013
通訊作者
國別 CHN
公開徵稿
出版型式
出處 The 4th International Conference in Aerospace for Young Scientists (2019)
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118446 )

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