Optimized Design Methodology for Wing Box Structures Utilizing Euler–Bernoulli Beam Theory

Accurate wing box weight estimation is critical in early aircraft design. Traditional empirical methods lack precision for novel configurations, while high-fidelity finite element analysis (FEA) is computationally intensive. This study presents a rapid, robust estimation framework based on Euler–Bernoulli beam theory. The method parameterizes wing box geometry via spar locations, computes cross-sectional properties, and evaluates structural response under typical loads. Strength and buckling stability checks ensure structural reliability. Validation against FEA under identical conditions achieved the intended objectives in terms of engineering applicability. This approach offers an efficient and accurate tool for preliminary wing box structural weight assessment, facilitating early-stage design decisions.