弾性振動をする揚力物体に働く非定常空気力の境界要素法による解析

概要

論文の詳細を見る
BEM (Boundary Element Method) based on Green's function is extended functionally to calculate unsteady aerodynamic forces acting on an elastically vibrating lifting body. This paper treats an aeroelastically scaled wind tunnel model as a lifting body which executes harmonic oscillation in compressible flow. The key variables which describe the boundary condition are panel center velocity vector and normal vector increment at a panel center. The present paper shows how to determine these two variables using FEM vibration analysis data. The model has rigid airfoil segments attached to a flexible spar at a partial spanwise position and a leading and trailing edge control surfaces; variable determination is therefore treated separately according to these structurally different parts. Several typical cases of elastic vibration and control surface oscillation are calculated by the present method and compared with DPM (Doublet Point Method) analysis. The correspondence between these two methods is fairly good.
東海大学の論文