FREE VIBRATION CHARACTERISTICS OF ISOTROPIC AND LAMINATED ORTHOTROPIC SPHERICAL CAPS

摘要: Abstract This paper deals with the free vibration characteristics of isotropic and laminated orthotropic spherical caps. A first order shear deformable semi-analytical shell finite element has been used to obtain axisymmetric asymmetric modes vibration. Two geometric configurations, namely deep shallow shells, have considered in analysis. Both thick thin ranges thickness ratio are studied. The effects ratio, shallowness, material orthotropy lay-up An attempt made explain some vibrational by observing energies various