臺灣博碩士論文加值系統

在車用避震器中，減震筒的性能表現足以影響避震器整體操作，然而影響減震筒性能最大最基本的因子莫過於活塞的效能，活塞效能優劣由流體經過活塞截面幾何形狀時所產生之阻尼力大小區分，然而已知活塞截面幾何的性能表現足以影響一支減震筒效能甚至可以決定一組避震器的性能取向，然而在減震筒開發時卻無法有可靠的活塞設計參考方向及數據作為設計基礎。
本文目的為提出一活塞截面幾何相對阻尼性能參考數據。主要先以電腦輔助設計軟體SolidWorks建立幾何模型再以ANSYS Workbench中的CFX計算流體力學軟體分析，求得活塞因截面幾何改變所產生之阻尼力變化。接著以實驗方法製作活塞模型，以活塞實際組配於減震筒並於萬能測試機台測試得到阻尼力數據。用實驗方法結果驗證數值模擬與其設定之條件變數所產生的結果，以符合現實避震器組件效能表現。
本文研究求得之結果顯示數值模擬結果非常貼近實驗測得結果，在三因子三水準的27組變數組合所得數值模擬及實驗量測結果之誤差值平均為6.8%。最大阻尼力發生在活塞幾何變數寬度6mm、倒角0.4mm、長度13mm的組合，產生最大阻尼力為153kg。由本研究可知活塞截面幾何變數對阻尼力的影響性由大到小分別為寬度大於倒角大於長度。

In the vehicle shock absorber，The performance of the Damper performance is sufficient to affect the overall operation of the shock absorber，However, the most basic factor affecting the Damper of the shock absorber is the efficacy of the piston，The efficacy of the piston is Good or bad distinguished by the amount of damping force generated by the fluid passing through the cross-sectional geometry of the piston，However, The performance of the piston section geometry is sufficient to affect a Damper can even determine the performance orientation of a group of shock absorbers，it is impossible to have a reliable piston reference direction and data as the design basis when developing the damper。
This paper proposes a reference data for the geometric relative damping performance of a piston section，the piston model is made experimentally，the piston is actually assembled to the damper cylinder and the data is measured on the universal testing machine and the damping force data is obtained，The experimental results verify that the results of the numerical method and its set condition variables can be consistent with the performance of the actual shock absorber components。
The results obtained in this study show that the numerical method results are very close to the experimental results，the error value of the numerical method and the experimental method obtained in the combination of 27 sets of variable combinations at three factors and three bench marks of variables is 6.8% on average，the maximum damping force in the width 6mm Chamfer 0.4mm Length 13mm combination produces a maximum damping force of 153kg in the geometry of the piston，it can be seen from the present study that the importance of the Piston section geometry variable of the piston section to the damping force is from big to small respectively than the the width is greater than the chamfer greater than the length。

摘要......i
Abstract......ii
誌謝......iv
目錄......v
表目錄......vii
圖目錄......viii
第一章 緒論......1
1.1 前言......1
1.2 研究動機與目的......2
1.3文獻回顧......3
1.4全文概述......6
第二章 減震筒結構及相關理論......7
2.1 避震器類型簡述......7
2.2 減震筒結構及作動說明......12
2.3 減震筒阻尼可調原理......15
2.4 阻尼力分析介紹......19
第三章 研究方法與進行步驟......21
3.1數值模擬與進行步驟......21
3.2實驗量測與進行步驟......32
3.3田口法介紹......38
第四章 結果與討論......41
4.1 數值模擬結果討論分析......42
4.2 實驗量測結果討論分析......43
4.3 數值模擬結果與實驗量測結果討論......45
4.4 田口方法表格......54
第五章 結論與建議......57
5.1 結論......57
5.2 建議......58
參考文獻......59
Extended Abstract......61

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