淡江大學機構典藏:Item 987654321/118446
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 62805/95882 (66%)
Visitors : 3933084      Online Users : 485
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
    •  Adv. Search
    Home ‧ Login ‧ Upload ‧ Help ‧ About ‧ Administer Goto mobile version


    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/118446


    Title: Aeroelastic analysis of rocket structural vibrations
    Authors: Chang, Yun-Shuo;Wang, Yi-Ren
    Keywords: nonlinear vibrations;internal resonance;perturbation technique;unsteady aerodynamics
    Date: 2019-10-12
    Issue Date: 2020-03-31 12:10:31 (UTC+8)
    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.
    Relation: The 4th International Conference in Aerospace for Young Scientists (2019)
    Appears in Collections:[Graduate Institute & Department of Aerospace Engineering] Proceeding

    Files in This Item:

    File SizeFormat
    index.html0KbHTML105View/Open

    All items in 機構典藏 are protected by copyright, with all rights reserved.

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback