Open AccessSensitivity study and structural optimization of an aircraft wing in the maximum-stress and flutter constraints
Author(s) -
Muhammad Kusni,
M Widiramdhani,
Bambang K. Hadi
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1173/1/012058
Subject(s) - flutter , aeroelasticity , sensitivity (control systems) , spar , constraint (computer aided design) , structural engineering , wing , minimum weight , process (computing) , shape optimization , engineering design process , engineering , computer science , finite element method , aerodynamics , mechanical engineering , aerospace engineering , electronic engineering , operating system
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.