NUMERICAL INVESTIGATION OF FREE VIBRATION ON NEW STEPPED WING MODEL

Abstract

Free vibration study represents one of the most important studies for complexstructure such as wing structure. In this search, a new model for wing structure wascreated including changing in the airfoil shape. The wing of airfoil Naca 2414 ofaluminum 2024 alloy was used to construct the wing. Four case studies wereaccomplished for different airfoil shape so that the location of the airfoil is change fromlocation to other at the chord. Free vibration analysis for five modes was performed toobtain the vibration characteristics such as natural frequency and mode shapes. Fromthe results, it was found that, in general the change in the airfoil leads to (keepingsame weight so the thickness and wing length remain constant) increase thevibration characteristics. A numerical program include the analysis was achieved andadded to ANSYS milieu as a new motivation.