TY - GEN
T1 - Shape optimization of unconstrained beam and plate damping layers
AU - Lumsdaine, Arnold
AU - Scott, Richard A.
N1 - Publisher Copyright:
© 1995 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 1995
Y1 - 1995
N2 - The aim of this paper is to determine the optimum shape of a symmetric unconstrained viscoelastic damping layer for a laminated composite structure undergoing harmonic excitation. The objective is to minimize the peak displacement at the first damped natural frequency. The material loss factor is monitored to determine the improvement in performance. Beam and plate structures are examined for several boundary conditions. The common assumption of constant viscoelastic material properties is investigated by comparing optimization results for cases with constant properties to those with varying properties. ABAQUS finite element code is used to model the structures. The optimization code uses a Sequential Quadratic Programming algorithm. Results show dramatic improvement in the loss factor for optimized shapes, In addition, the use of frequency dependent viscoelastic properties is insignificant in the cases examined. Finally, results indicate that minimizing the displacement at one frequency may cause significantly worse performance at other frequencies.
AB - The aim of this paper is to determine the optimum shape of a symmetric unconstrained viscoelastic damping layer for a laminated composite structure undergoing harmonic excitation. The objective is to minimize the peak displacement at the first damped natural frequency. The material loss factor is monitored to determine the improvement in performance. Beam and plate structures are examined for several boundary conditions. The common assumption of constant viscoelastic material properties is investigated by comparing optimization results for cases with constant properties to those with varying properties. ABAQUS finite element code is used to model the structures. The optimization code uses a Sequential Quadratic Programming algorithm. Results show dramatic improvement in the loss factor for optimized shapes, In addition, the use of frequency dependent viscoelastic properties is insignificant in the cases examined. Finally, results indicate that minimizing the displacement at one frequency may cause significantly worse performance at other frequencies.
UR - http://www.scopus.com/inward/record.url?scp=85103469569&partnerID=8YFLogxK
U2 - 10.1115/DETC1995-0555
DO - 10.1115/DETC1995-0555
M3 - Conference contribution
AN - SCOPUS:85103469569
T3 - Proceedings of the ASME Design Engineering Technical Conference
SP - 15
EP - 22
BT - 15th Biennial Conference on Mechanical Vibration and Noise - Vibration Control, Analysis, and Identification
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 1995 Design Engineering Technical Conferences, DETC 1995, collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium
Y2 - 17 September 1995 through 20 September 1995
ER -