論文旨在利用有限元素法(Finite Element Method)來模擬鋼製防火門在不同材質下的背溫及變形量之分析研究，本文採用有限元素法分析軟體ANSYS為數值模擬工具。在程式驗證方面，首先以Ugural推導簡支圓板受溫度負載之理論解與數值模擬結果比較。並在考慮傳導、對流及輻射效應等係數情形下，將模擬結果與Tabaddor的研究結果進行比較，證實有限元素軟體可有效預測溫度變化及變形量。最後設計一符合防火等級之防火門，以業界常用的隔熱層間材與中心材為參數，並測試各種中心材與層間材的排列組合，觀察各種隔熱材料對防火門的影響，並找出一種阻熱效果最好的層間材與中心材的組合。由上述測試得以下結論:
(1)在結構材料參數中，對變形量影響最大的參數為熱膨脹係數。
(2)若在不考慮化學反應的情況下，門扇的組成材料對量測點之變形量不會造成可觀的影響，影響最大的應為門扇本身的骨架結構與門樘的架構。

This paper is to investigate the unexposed temperature distribution and deformation of a fire door with different materials in a furnace by numerical simulations. The finite element method by the ANSYS is used for the numerical simulation tool. In the part of verification, first, the numerical simulation comparison with the exact solution of simply supported circular plate to thermal loading performed by Ugural. Second, the fire door proposed by Tabaddor the effect of radiation is very important in this case. The simulation results is compared well with Tabaddor. It indicates that the finite element software can well predict the temperature distribution and deformation. Finally, the design of a fire door, this study based on the materials choice is investigated. A variety of permutations and combinations for laminate plank board and sandwich board are choice. As much as possible to observe the impact of various insulation materials of fire door, we find out the best of a fire resistance combination for laminate plank board and sandwich board. From the above tests, the following conclusions are given:
(1) In the parameters of structural materials, the thermal expansion coefficient is important factors on deformation of a fire door.
(2) Excluding the chemical reaction, affect the maximum should be the framework of door frame and the skeleton structure of fire door.

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