抄録
The modal analysis is applied both experimentally and numerically to study vibration characteristics of a symmetrically laminated rectangular plate with point masses attached on the surface. The problem is solved numerically by using the Ritz solution, which is derived theoretically from the functional with the kinetic energy of the added point masses, and the results are obtained to study the effect of the point masses on vibration behavior. Then, the experimental modal analysis is used to measure the natural frequencies and mode shapes. The two sets of results are compared and turned out in good agreement. Subsequently, the lay-up design problem is considered to maximize the fundamental frequencies by use of the layerwise optimization (LO) approach. The design variables are taken for a set of fiber orientation angles in the symmetric layers.
