摘要：Natural- or man- made materials of cylindrical anisotropy or polar orthotropy are of considerable interest in several areas of technology. Some static problems are amenable to exact analytical solutions when dealing with polarly orthotropic plates or slabs. On the other hand, when analyzing their transverse vibrations, some important, practical problems do not lead themselves to straightforward analytical solutions and it turns out to be more convenient to make use of an approximate treatment like in the present case where the fundamental frequency of simply supported and clamped plates carrying an eccentrically located mass is determined.
