本論文將透過電腦輔助分析的方式，來探討多軸旋翼機機身結構板之懸臂各項特徵尺寸及孔洞配置對於結構強度的影響。主要使用田口方法(Taguchi Methods)，利用直交表(Orthogonal Array，OA)來安排各項實驗，並應用ANSYS Workbench Mechanical 模組來進行網格處理、邊界條件的設置，透過有限元素法(Finite element method)來進行模擬，比較各參數因子配置下各觀測數值之表現。並經由最佳化分析來找到各結構形態下相對最佳的參數配置。文中主要探討的設計因子有：懸臂的漸縮角、懸臂根部圓角半徑、減重孔位置及尺寸；觀察監測的數值主要為各點應力分布及變形量，最佳化的目標為單位質量的結構強度。經由電腦輔助分析來探討如何在能保持結構強度的前提下，達到機身結構輕量化的目標。

This thesis explores the impact of various characteristic dimensions and hole configurations on the structural strength of cantilevered structural plates in multi-rotor aircraft fuselages through computer-aided analysis. The primary methodology employed is the Taguchi Methods, utilizing an Orthogonal Array (OA) to arrange various experiments. ANSYS Workbench Mechanical module is used for mesh processing and setting boundary conditions. Simulations are conducted using the Finite Element Method (FEM) to compare the performance of observed values under different parameter configurations. Optimization analysis is then performed to find the relatively optimal parameter configuration for each structural form.

The main design factors discussed include the taper angle of the cantilever, the fillet radius at the root of the cantilever, and the position and size of weight-reduction holes. The observed and monitored values are primarily the stress distribution and deformation at various points, with the optimization goal being the structural strength per unit mass. This computer-aided analysis aims to explore how to achieve the goal of fuselage structural lightweighting while maintaining structural strength.

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