Modally Enhanced Dynamic Absorber (MEDA) - IMAC 22

P.Avitabile, J.Hodgkins

The development of any structural dynamic model will invariably have several or many modes that produce undesirable effects in terms of performance.  Often this is not determined until very late in the product development cycle.  Typically, a tuned absorber is designed as a “band-aid” to remedy the situation. 

 This concept of the tuned absorber is extended to address multiple modes in the early design stages to de-tune multiple modes simultaneously utilizing an optimized substructuring methodology.  This is referred to as the Modally Enhanced Dynamic Absorber-MEDA.   The main structural dynamic characteristics are used as targets to design a substructure that has the same frequencies and mode shapes as those of the main structure.  The assembly of the optimized substructure to the main structure will de-tune the modes of interest included in the optimization process.  The end result is an improved overall dynamic characteristic similar to that observed in tuned absorber applications.

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