English  |  正體中文  |  简体中文  |  Items with full text/Total items : 65421/65421 (100%)
Visitors : 22311846      Online Users : 69
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU 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
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/2562


    Title: 振動床於弱振動下顆粒運動機制研究;Motion Mechanisms in the Vibrated Granular Bed Under Weakly Vibration
    Authors: 黃大慶;Ta-Ching Huang
    Contributors: 機械工程研究所
    Keywords: 振動床;弱振動;粒子流;Vibrated Bed;Granular Flow;Weak Vibration
    Date: 2005-07-01
    Issue Date: 2009-09-21 11:50:29 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 本文探討矩形柱弱振動床中影響顆粒運動之機制與原因。由於振動床的弱振動運動現象在實驗中極易受到各種因素變化的影響,因此本研究以類固體層高度實驗設計探討影響振動床內顆粒運動的因素。探討不同振動條件時,類固體層的高度變化及類液體層的深度變化。 類固體層高度隨著振動加速度的增強而降低。在低振動頻率情形下,受到振動加速度的影響較為敏感,較小的振動加速度就可以達到充分的類液體化運動狀態;而在中等振動頻率的情形下,類固體層高度與振動加速度的關係,呈現比較緩和的負相關;在高振動頻率的情形下,需要較大的振動加速度才能使顆粒體達到充分類液體化運動狀態。在振動條件比較小的情形下,顆粒體聚集成塊狀如同固體一般,定義為完全類固體化區域。逐步得增強振動加速度,當振動條件超過一臨界值?s時,容器內顆粒體會開始發生類液體化運動現象;持續地增強振動加速度,當振動條件超過一臨界值?l時,容器內顆粒會達到充分類液體化運動現象。 本論文明確的決定出顆粒振動床在不同振動條件下的三種運動現象,完全類固體化運動區域(Completely Solid-Like Region)、類液體化運動區域(Liquid-Like Region),充分類液體化運動區域(Fully Liquid-Like Region)並獲得各種不同振動頻率下的運動機制振動加速度相圖。 In vibration granular bed. The study investigated the effects under weakly vibrating mechanisms in a rectangular vibrated bed. The main experiment were performed to study the weakly vibrating mechanisms in a vibrated granular bed. First, the solid-like experiment was performed to investigate the solid-like layer and the minimum vibration acceleration under the different vibration frequencies, which all the particles in the bed moved allover the bed. And the minimum vibration acceleration under the different vibration frequencies, which all the particles in the bed triggered off the bed. The three different motion mechanisms were found in this study. The solid-like layer existed in Solid-Like Region motion mechanism where the vibration conditions were weak. In Liquid-Like Region mechanism where the binary mixture of particles. For the stronger vibration conditions, the effects of strength on particles motions in the vibrated granular bed were dominant.
    Appears in Collections:[機械工程研究所] 博碩士論文

    Files in This Item:

    File SizeFormat
    0KbUnknown332View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明