- 學位論文
使用有限元素法分析滑橇式起落架之結構強度與疲勞
Analysis of Structural Strength and Fatigue for Skid Landing Gears Using Finite Element Method
摘要
起落架之結構安全對於直升機尤其重要，主要承受直昇機降落時數倍於全機負載，緩衝、吸收飛機結構體與地面之衝擊力，本研究將以3D電腦輔助軟體Solidworks建立模型以及有限元素軟體ANSYS Workbench進行分析，其中考慮了四種管形起落架，分別是圓形、方形、橢圓以及扁圓，利用靜態分析找出四種管形起落架最佳的腳架傾斜角度與腳架彎曲程度，接著進行靜態分析以及疲勞分析，來比較出最佳的管型起落架，最後針對此管型起落架進行最重要的掉落測試，驗證是否符合FAA垂直降落規範。 經過靜態分析與疲勞分析所得之結果發現，圓形管起落架之表現皆優於其餘管形的起落架，而最後的掉落測試也驗證了本研究圓形管起落架符合FAA垂直降落之標準。 本研究建立了滑橇式起落架垂直降落模擬分析流程，所得之結果作為直昇機以及UAV等其它使用相似類型的起落架結構後續研究者參考。
並列摘要
The structural safety of landing gear is especially important for helicopter. Landing gear needs to support the weight of the full loaded helicopter and lower the impact while landing. The present study built the models with Solidworks which is a three-dimensional computer-aided software and used finite element method analysis software ANSYS Workbench to analyze skid landing gear models. In the present study, there are four tubular shapes of landing gears have been considered. The present study used static analysis to find out their optimal tilt angle and bending radius of cross tube. Then, we compared all of skid landing gears to identify what kinds of skid landing gears is the best. Finally, we conducted the drop test for the skid landing gear which is the best to verify compliance with FAA vertical landing specifications. The results of static analysis and fatigue analysis, showing the circular tube skid landing gear performance are better than the rest of skid landing gears. And the drop test result also showed circular tube skid landing gear meets FAA vertical landing standards. The present study established complete skid landing gear simulation of vertical landing analysis process. And the results obtained provide future researchers.
參考文獻
延伸閱讀
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