English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 49378/84106 (59%)
造訪人次 : 7360254      線上人數 : 73
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/104508


    題名: Vibrations in an elastic beam with nonlinear supports at both ends
    作者: Yi-Ren Wang;Zhi-Wei Fang
    關鍵詞: vibration;nonlinear boundary conditions;elastic beam
    日期: 2015-06-16
    上傳時間: 2016-01-06 11:00:30 (UTC+8)
    摘要: This study analyzed vibrations in an elastic beam supported by nonlinear supports at both ends under the influence of harmonic forces. We hypothesized that the elastic Bernoullis-Euler beam was supported by cubic springs to simulate nonlinear boundary conditions. We described the dynamic behavior of the beam using Fourier expansion and simulated mode shapes using the Bessel function. We then applied the Hankel transform to obtain particular (non-homogeneous) solutions. This study succeeded in describing the jump phenomenon of nonlinear frequency response, from which we derived the resonance frequency and the frequency region(s) of system instability. Models based on linear boundary conditions are unable to capture this phenomenon. A larger modulus of elasticity in nonlinear supports increases the frequency of unstable vibration in the 1st mode and also widens the frequency region of system instability. This influence is less prominent in the 2nd mode, in which the largest amplitude was smaller than those observed in the 1st mode. The model and the analytical approach presented in this study are widely applicable to construction problems, such as shock absorber systems in motorcycles, suspension bridges, high speed railways, and a variety of mechanical devices. According to our results, system stability is influenced by the frequency regions of system instability as well as the nonlinear modulus of elastic supports.
    關聯: Journal of Applied Mechanics and Technical Physics 56(2), pp.337-346
    DOI: 10.1134/S0021894415020200
    顯示於類別:[航空太空工程學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML82檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

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