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Title: Mechanical Vibrations
Department: Mechanical Engineering
Author: Prof. S.K. Dwivedy Prof. Rajiv Tiwari
University: IIT Guwahati
Type: WebLink
Abstract: The role of mechanical vibration analysis should be to use mathematical tools for modeling
and predicting potential vibration problems and solutions, which are usually not obvious in
preliminary engineering designs. If problems can be predicted, then designs can be modified to
mitigate vibration problems before systems are manufactured. Vibrations can also be
intentionally introduced into designs to take advantage of benefits of relative mechanical motion
and to resonate systems (e.g., scanning microscopy). Unfortunately, knowledge of vibrations in
preliminary mechanical designs is rarely considered essential, so many vibration studies are
carried out only after systems are manufactured. In these cases, vibration problems must be
addressed using passive or active design modifications. Sometimes a design modification may be
as simple as a thickness change in a vibrating panel; added thickness tends to push the resonant
frequencies of a panel higher leading to less vibration in the operating frequency range. Design
modifications can also be as complicated as inserting magneto-rheological (MR) fluid dampers
into mechanical systems to take energy away from vibrating systems at specific times during their
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