Optimization process is very important to be done since the preliminary design step, not only for the static load aspect but also dynamic load as well. In the past, aeroelastic behavior aspect is often neglected in this stage and consequently becomes a problem at the later stage of design. This paper contains multi-constraints design sensitivity and optimization which include both maximum stress constraint and damping flutter constraint. Sensitivity study was performed to assist optimization process and makes the process more efficient. Wing structure was modeled as skins, ribs, spar-webs, and spar-caps. Optimization process was done by changing thickness of each component and beam dimension. The methodology used in this paper is a gradient-based optimization developed by MSC Nastran. The final cycle of this optimization has successfully reduced structural weight up to 33% without violating static and flutter constraint.

从初步设计步骤开始，优化过程就非常重要，不仅对于静载荷方面，而且对于动态载荷也是如此。过去，气动弹性行为方面往往在这个阶段被忽视，从而成为设计后期的一个问题。本文包含多约束设计敏感性和优化，包括最大应力约束和阻尼颤振约束。进行敏感性研究以协助优化过程并使过程更有效。机翼结构建模为蒙皮、肋、翼梁腹板和翼梁帽。通过改变每个组件的厚度和梁尺寸来完成优化过程。本文中使用的方法是由 MSC Nastran 开发的基于梯度的优化方法。