複合結構壓力容器設計與製程之探討

The Investigation of Design and Fabrication of Composite Pressure Tank

陳庭維(Ting-Wei Chen)

指導教授 ： 胡惠文

國立屏東科技大學/工學院/車輛工程系所/碩士(2013年)

https://doi.org/10.6346/NPUST.2013.00168

摘要

本論文旨在探討複合式結構壓力容器之設計與製程優化，以提供混合式火箭氧化劑之儲存使用。首先利用CAD與CAE技術進行壓力容器結構設計，包含鋁合金內膽、碳纖維複合材料疊層與纏繞設計、樹脂的選用等等。在製程探討方面，鋁合金內膽由兩端蓋與圓筒相互銲接而成、而複合材料纏繞疊層則是用來補強鋁合金內膽等。利用有限元素分析來評估壓力容器剛性與強度，而藉由實驗模態分析(EMA)來驗證有限元素分析模型，使有限元素模型與實際結構有良好等效性。利用驗證後之有限元素模型進行壓力容器結構與強度之分析模擬。進行熱應力分析則是考量到環氧樹脂在高溫熟化過程中可能導致熱應力進而使結構於鋁合金內膽與複合材料介面產生脫層。最後，藉由水靜壓力測試與應變量測來確認壓力容器之目標強度。測試結果顯示壓力容器沒有洩漏發生。

關鍵字

壓力容器 ； 碳纖維複合材料疊層 ； 纖維纏繞 ； 有限元素模型 ； 實驗模態分析 ； 水靜壓力測試 ； 熟化溫度 ； 結構脫層

並列摘要

The purpose of this research is to investigate the design and fabrication of a pressure tank which will be used for the storage of oxidizer of hybrid rocket. In the firt place, pressure tank is designed using CAD and CAE technology, including aluminum liner design, filament winding design, epoxy selection, etc. Aluminum liner is fabricated by using welding to assemble the cylinder and bulkhead. Filament winding is used to reinforce the aluminum liner. Finite element analysis (FEA) is used to evaluate the structure stiffness and strength of pressure tank. Experimemtal modal analysis (EMA) is used to validate the finite element model in order to obtain equivalent model. This validated model is then used to analyze the stiffness and strength of pressure tank. Epoxy resin is of concern since the high curing temperature may cause the thermal stress problem which leads to de-bonding between aluminum liner and composite laminate. Thermal analysis using FEA is therefore required. Hydaulic test is conducted on the pressure tank eventually. Strain gage are used to measure the deformation of pressure tank. The test results show that no leakage occurs for the pressure tank.

並列關鍵字

Composite Pressure tank ； Composite laminate ； Filament winding ； Finite element model ； Experimental modal analysis ； Hydraulic test ； Curing temperature ； De-bonding

參考文獻

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