The present paper illustrates the various developments in the field of structural dynamic modification (SDM). SDM techniques can be defined as the methods by which the dynamic behavior of a structure is improved by predicting the modified behavior brought about by adding modifications like those of lumped masses, rigid links, dampers, beams etc or by variations in the configuration parameters of the structures itself. The theory of SDM started in the late 70s. But intensive research has taken place only after a decade and subsequently light has been put on this subject in recent years. The contribution of many researchers to this field has taken the subject to a new era of investigation. The modification in any structure to improve its natural frequencies has received a lot of attention in many areas as structure response is heavily influenced by its natural frequencies. FEM is a basic tool that is used for analysis of such structures, which simplifies the laborious calculations
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