全地形車輛車架結構動態分析

Dynamic Analysis of the Frame Structure of an All Terrain Vehicle

潘威武(Wei-Wu Pan)

指導教授 ： 郭桂林

國立臺北科技大學/機電學院/車輛工程系所/碩士(2009年)

摘要

全地形多功能車輛，簡稱ATV，在台灣多指其為沙灘車。ATV所行駛的環境較一般車輛更為嚴苛，受力狀況也較為複雜，車架結構必須要有足夠的強度及剛性，以滿足環境要求。
本研究係與台灣金蜂股份有限公司合作，目的在於「使用電腦輔助工程技術建立產品開發結構分析流程」，以減少測試-修改-再測試之迴圈次數，縮短產品開發時程，增進產業競爭能力，並有效降低開發成本。
經由探討該公司某新型車款，於新產品開發、測試階段發生之振動與車架斷裂案例，建立分析流程及方法。依據廠方測試設備與設計規範，通過使用有限元素方法，建立有限元素模型，使用CAE分析軟體MSC.Nastran及LS-Dyna進行分析，探討其振動問題與模擬台上耐久測試，搭配廠商ATV設計、製造及測試等技術能量，進行實驗與分析結果比對，驗證其結果合理性，並討論案例發生原因與改進方向。
透過此ATV結構分析流程，可於產品開發過程中，提供設計參考與改善建議，能有效縮短開發週期、降低開發成本，增進產業競爭能力。

關鍵字

全地形多功能車輛 ； 電腦輔助工程 ； 有限元素方法 ； 模態分析

並列摘要

All-terrain vehicles (ATV) are off-road vehicles. In Taiwan they are often referred as beach buggies. Their operating conditions are harsher than regular commute vehicles. Their external loads are relatively complicate. In order to meet the required operating conditions, structure strength and stiffness of the ATVs should be carefully considered.
This study is funded by Taiwan Golden Bee Co. Ltd. The objective is to develop a design procedure to improve the design cycle, and effectively reduce the prototype testing. In the study, the computer-aided-engineer (CAE) is used to predict the design performance and effectively correct the potential failure in the design or manufacturing.
A noticeable vibration and cracks were found during the prototype test. A CAE tool, MSC.NASTRAN, is used to predict the vibration. A good correlation between the CAE analysis and hardware testing is verified. Another CAE tool, LS-DYNA, is used to simulate the durability test. The component stress distribution was calculated. Based on the predicted performance, the potential failure areas were identified. The results show good correlation between analysis and hardware test.
A design procedure utilizing CAE tool to improve the design cycle, and reduce the prototype cost is achieved. It’s recommended to use the same design procedure in the future ATV product development.

並列關鍵字

All Terrain Vehicle ； Computer Aided Engineering ； Finite Element Method ； Modal Analysis

參考文獻

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