Abstract: This paper presents a general approach for the free vibration analysis of curvilinearly stiffened rectangular and quadrilateral plates using the Ritz method by employing classical orthogonal Jacobi polynomials. Both the ...

Abstract: The free vibration of curvilinearly stiffened shallow shells is investigated by the Ritz method. Based on the firstorder shear deformation shell theory and threedimensional (3D) curved beam theory, the strain and kinetic ...