TY - GEN
T1 - Optimal design of an acoustic enclosure for minimal broadband sound radiation
AU - Lee, Dongjai
AU - Kooprnann, Gary H.
AU - Belegundu, Ashok D.
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Reducing unwanted noise radiating from a vibrating structure continues to be a major challenge in engineering design. In this paper, high impedance structures characterized with uniquely identifiable resonance modes are considered for sound power reduction using an enclosing surface. An optimization strategy for the thin enclosure design is presented. A close-fitting and equipment-mounted enclosure is attached to the vibrating structure with translational springs. To model the coupled system, a new compact and symmetric system matrix analysis using component modal synthesis and fluid displacement potential to deal with the coupled system is developed. This leads to a new application of optimization to the coupled system to reduce the radiated sound power. Numerical optimizations are performed for a plate enclosure. It is shown that large reductions in radiated sound power are possible with optimally positioned and rated attachment springs.
AB - Reducing unwanted noise radiating from a vibrating structure continues to be a major challenge in engineering design. In this paper, high impedance structures characterized with uniquely identifiable resonance modes are considered for sound power reduction using an enclosing surface. An optimization strategy for the thin enclosure design is presented. A close-fitting and equipment-mounted enclosure is attached to the vibrating structure with translational springs. To model the coupled system, a new compact and symmetric system matrix analysis using component modal synthesis and fluid displacement potential to deal with the coupled system is developed. This leads to a new application of optimization to the coupled system to reduce the radiated sound power. Numerical optimizations are performed for a plate enclosure. It is shown that large reductions in radiated sound power are possible with optimally positioned and rated attachment springs.
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U2 - 10.1115/IMECE2005-82943
DO - 10.1115/IMECE2005-82943
M3 - Conference contribution
AN - SCOPUS:33645959477
SN - 0791842258
SN - 9780791842256
T3 - American Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) NCA
SP - 61
EP - 70
BT - American Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) NCA
T2 - 2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005
Y2 - 5 November 2005 through 11 November 2005
ER -