(3.236.231.14) 您好!臺灣時間:2021/04/11 23:05
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果

詳目顯示:::

我願授權國圖
: 
twitterline
研究生:李勝煌
研究生(外文):Lee, Shen-hwang
論文名稱:非線性壓膜問題分析
論文名稱(外文):Study of the Non-linear Fluid Squeeze Film Problem
指導教授:李雨李雨引用關係---
指導教授(外文):Lei-U
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:應用力學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:1997
畢業學年度:85
語文別:中文
論文頁數:109
中文關鍵詞:壓膜非線性步階函數壓力鬆弛阻尼器彈簧
外文關鍵詞:squeeze filmnon-linearstep functionpressure relaxationdamperspring
相關次數:
  • 被引用被引用:0
  • 點閱點閱:170
  • 評分評分:系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔系統版面圖檔
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本文從基本的流體力學原理出發,探討兩平行板間在板子作相對垂直運動時二平板間
間隙氣體之非線性壓膜行為,共考慮兩平板間作三種型式的相對運動,分別為平板位移是
步階函數(step function)、平板速度是步階函數及平板位移是簡諧函數,我們以 數值方
法對非線性的壓力統御方程式求解,先與前人的線性解析解驗證無誤後,我們再進行詳細
之力學分析。對於第一種型式運動,我們研究了非線性狀況下的壓力鬆弛現象;對於可用
以模擬加速度計瞬間減速的第二種型式運動,我們發現氣膜扮演彈簧的功能;對於第三種
型式運動,當振幅與氣膜平均厚度之比值(e)在很小時,氣膜在低頻時扮 演線性阻尼器,
高頻時扮演線性彈簧的功能,當e大於等於0.1時,出現由非線性效應引發之穩態項,當e
大於等於0.3時,出現平板相對位移與速度之偶合項,氣膜則扮演非線性阻尼器與彈簧的
功能,希望本文對半導體微加速計的研究與發展有所助益。

The nonlinear behavior of the squeeze film problem between two parallel
plates is studied in the present thesis. Three types of relative motion
etween the plates have been analyzed : the relative displacement is a step
function , the relative velocity is a step function , and the relative dis-
placement is a harmonic function in time. The problem is studied through
the numerical calculation of the governing equation for pressure according
to the lubrication theory. The numerical solution is first checked against
the previous linear theory. The mechanical behavior of the squeeze film is
then analyzed based on the detailed calculations of both the linear and
nonlinear problems. For the first type of plate motion, the nonlinear pro-
cess of the pressure relaxation is studied. For the second type of plate
motion, the mechanical response of the gas film between the plates acts as
a spring. For the third type oh plate motion, the linear theory can be app-
lied when the ratio between the amplitude of oscillation and the average
film thickness, e , is much less than unity. The gas film behaves as a
linear damper at low frequencies , but acts as a linear spring at high fre-
quencies. When e =0.1, or > 0.1, the steady force associated with the non-
linear effect becomes important. When e =0.3, or > 0.3, a force due to the
coupling effect of displacement and velocity appears, and the gas film
behavior as a nonlinear damper at low frequencies but acts as a nonlinear
spring at high frequencies. It is hoped that the present study can find
applications in the research of micro-electro-mechanical system.

QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
系統版面圖檔 系統版面圖檔