TY - GEN

T1 - Optimizing the spatial distribution of damping in structures with boundary damping

AU - McDaniel, J. Gregory

AU - Wixom, Andrew S.

PY - 2012/12/1

Y1 - 2012/12/1

N2 - The present work seeks to optimize the spatial distribution of damping in structures with boundary damping. This work is motivated by design considerations, such as weight and cost, that often limit the amount of damping that can be used. In such cases, the designer must choose the spatial distribution of damping in order to reduce the structural vibration. One intuitively expects that the presence of boundary damping affects the optimal distribution of damping in the structure. In particular, one expects that the optimal design places damping treatments away from such boundaries in order to achieve an even distribution of power flow from the structure. To investigate this effect, finite element models of vibrating structures are developed in which the spatial distribution of damping is parameterized. These parameters are regarded as optimization parameters that are searched to minimize a cost function related to vibration or noise, such as the average response of the structure over a frequency band. Examples are presented that illustrate the effect of boundary damping on the optimal distribution of damping.

AB - The present work seeks to optimize the spatial distribution of damping in structures with boundary damping. This work is motivated by design considerations, such as weight and cost, that often limit the amount of damping that can be used. In such cases, the designer must choose the spatial distribution of damping in order to reduce the structural vibration. One intuitively expects that the presence of boundary damping affects the optimal distribution of damping in the structure. In particular, one expects that the optimal design places damping treatments away from such boundaries in order to achieve an even distribution of power flow from the structure. To investigate this effect, finite element models of vibrating structures are developed in which the spatial distribution of damping is parameterized. These parameters are regarded as optimization parameters that are searched to minimize a cost function related to vibration or noise, such as the average response of the structure over a frequency band. Examples are presented that illustrate the effect of boundary damping on the optimal distribution of damping.

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U2 - 10.1115/NCAD2012-1206

DO - 10.1115/NCAD2012-1206

M3 - Conference contribution

AN - SCOPUS:84884883396

SN - 9780791845325

T3 - American Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) NCAD

SP - 453

EP - 456

BT - ASME 2012 Noise Control and Acoustics Division Conference at InterNoise 2012, NCAD 2012

T2 - ASME 2012 Noise Control and Acoustics Division Conference at InterNoise 2012, NCAD 2012

Y2 - 19 August 2012 through 22 August 2012

ER -