現今台灣消費意識提高，消費者對於居住空間的要求越來越有品味，相對於椅子的需求也不在是單方面基本機能的考量，因此造型有變化的椅子（造型椅）對於使用上及空間展示上，將會強烈影響到消費者的購買意願。要如何設計出能讓消費者產生吸引力的造型椅，並符合成本及安全的考量需求，本研究將提出一套理論流程來設計及分析造型椅，希望所設計的出造型椅相關材料、造型及尺寸，能提供設計師設計時的重要參考依據。
理論分析流程共分為三部份進行，第一部份為參考市面上所販售的造型椅及人體工學的原理，再輔以3-D繪圖軟體AUTOCAD設計出造型椅模型的樣本及其相關尺寸。第二部份為根據所建立的模型轉換到有限元素分析軟體ANSYS上，並進行模型的元素網格化，再根據椅子使用的狀況，建立相關的負載及邊界條件。之後，再以ANSYS求得造型椅模型結構的應力及變形狀況，以評估結構的安全性。第三部份為利用田口最佳化設計及靈敏度分析軟體，來求得造型椅模型的最佳化的設計尺寸，並使得設計出的造型椅能符合使用上的安全及最經濟的用料成本。

Nowadays, the taste of the living space for consumers has increased due to the rise of the consuming consciousness in Taiwan. The demand of the chair does not only consider the mere basic function. Therefore, the usage and display of the chair with variable appearance and shape (formative chair) will strongly influence on the purchasing desire of consumers. How to design a formative chair to attract the consumer and to fit the demand of the safety and cost, a theoretical procedure is proposed to design and analyze the formative chair in this thesis. It is expected to offer an important reference guide of the material, shape and size of the formative chair to the designer when designing a formative chair.
The theoretical analysis procedure is divided into three parts. The first part is to reference the selling formative chair and the principle of the human mechanism and use the 3-D plotting-program “AUTOCAD” to design the model’s sample and relative size. The second part is to base on the designed model and transfer it to the finite element program “ANSYS” and build the model element mesh. After that, based on the loading and boundary conditions, the “ANSYS” is used to analyze the stress and deformation of the model structure and evaluate the model’s safety. The third part is to use the “Taguchi” and sensitivity analysis software to optimize the size of the designed model. It is expected to design a formative chair to fit the safety and the economic cost.

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