TY - JOUR T1 - Dynamic Instability Analysis of a Swept Wingin Time - Domain TT - تحلیل ناپایداری دینامیکی بال پسگرا در حوزه زمان JF - mdrsjrns JO - mdrsjrns VL - 9 IS - 1 UR - http://mme.modares.ac.ir/article-15-227-en.html Y1 - 2009 SP - 93 EP - 106 KW - Assumed Mode Method KW - Flutter KW - Linear Aeroelasticity KW - Swept Wing KW - Time domain N2 - In this paper linear aeroelastic analysis of a swept wing with two degrees of freedom in an incompressible flow is investigated in time - domain. The equations of the motion of an elastic wing are derived from Lagrange’s equations in time - domain. The wing is modeled as a cantilever beam rigidly connected to the root. Considering assumed modes of cantilever beam, aerodynamic forces and moments acting on the wing are derived using strip - theory in an unsteady incompressible potential fluid flow. The governing aeroelastic equations of the system have been introduced in dimensionless form. These equations are solved via a numerical method. Comparisons between obtained results and both available experimental data and the results of some cited references indicate a close agreement. M3 ER -