EFFECTS OF SUBTENDED AND VERTEX ANGLES ON THE FREE VIBRATION OF OPEN CONICAL SHELL PANELS: A CONICAL CO-ORDINATE APPROACH

摘要: This paper presents a computational investigation on the effects of subtended and vertex angles free vibration characteristics open conical shell panels. Unlike conventional approximation using rectangular or cylindrical co-ordinate system, this analysis adopts natural system so that any in geometry is eliminated. The strain curvature components formulated orthogonal have been employed to derive kinetic energy integrals. functional minimized accordance with Ritz procedure arrive at governing eigenvalue equation. Admissible shape functions compromising sets two-dimensional polynomials basic function are account for boundary constraints approximate three-dimensional displacements shell. Comparison frequency shows excellent agreement solution finite element, strip integral equation methods. other geometric parameters investigated comprehensive parametric study. Selected mode shapes illustrated enhance physical understanding such