Location optimized hybrid damping for one-dimensional flexible structures
M. Kruik (TU Delft - Mechanical Engineering)
S.H. Hassan HosseinNia – Mentor (TU Delft - Mechatronic Systems Design)
Niranjan Saikumar – Mentor
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Abstract
Damping vibrations of flexible structures is a subject of importance in several industries, as the aerospace and high-tech industry. Especially when the ratio of damping over weight needs to be high. In literature optimization of this ratio is achieved in several manners, through optimization of individual damping methods, ie. active and passive damping. And through combining those methods to have passive damping supporting active damping. This paper introduces a novel hybrid damping method, which achieves further optimization of the ratio. This is done through analyses of the eigenmodes of the flexible structure and the properties of the damping methods, to find the optimal damping method for each eigenfrequency individually. Later on those methods are combined in the hybrid damping method, to ensure damping of a wide bandwidth of eigenfrequencies. This all is obtained by researching the properties of the individual damping methods, constrained layer damping (CLD) and active damping (AD), and the influence of combining those in a hybrid system. With this knowledge a methodology to optimize hybrid damping for a generic one-dimensional structure is developed, including rules-of-thumb aimed at simplifying the optimization approach.