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Title: | 隨身碟之落下衝擊分析與最佳化設計 Analysis of Drop Impact and Optimal Design for Flash Drives |
Authors: | Chun-Jung Tu 涂峻榮 |
Advisor: | 黃元茂 |
Keyword: | 落下衝擊,有限元素法,田口法,最佳化,加速度, drop impact,finite element method,Taguchi method,optimization,acceleration, |
Publication Year : | 2009 |
Degree: | 碩士 |
Abstract: | 隨身碟的落下衝擊分析為一高度非線性的動力學問題。本文結合有限元素法與直接積分法理論,利用軟體分析隨身碟的落下衝擊行為。加速度為電子產品重要元件的破壞判斷準則,以CNS的測試規範作為參考,本文研究隨身碟在不同落下方向與不同結構參數下,模型的加速度與應力分布情況。
最後將加速度計算數據代入田口最佳化法,以降低結構所受之衝擊加速度為目標,對隨身碟進行結構最佳化分析,並得到最佳化的設計參數組合。結果所受的衝擊加速度較原始設計降低了16 。此外由應力分析可知,使隨身碟產生最大應力值的落下方向為E3,但此值並不會造成材料的破壞。 本文之分析以CAE技術結合最佳化方法,可提供其他產品作為研究方法,並能有效降低設計成本。 This study analyzes the drop impact of a flash drive that is a highly non-linear dynamic problem. The finite element method, the direct integration method and software are used for the analysis. Acceleration that is used to judge the failure of a flash drive, referred to the CNS test standard, the accelerations and the stress distribution of a flash drive in different drop directions, and the influence of different structural parameters are studied. Taguchi optimal method is used with calculation data. Minimizing the acceleration of a flash drive due to drop impact, the structure of flash drive with optimal combination of parameters is optimized. The impact acceleration is reduced 16% compared with the current design. Based on the stress analysis, the drop direction of maximum stress is E3, but the stress value will not cause the destruction of the material. This study proposes the combination of the CAE method and Taguchi optimal method and offers a designing method for other products to reduce the design cost effectively. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/23224 |
Fulltext Rights: | 未授權 |
Appears in Collections: | 機械工程學系 |
Files in This Item:
File | Size | Format | |
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ntu-98-1.pdf Restricted Access | 1.22 MB | Adobe PDF |
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