TY - GEN
T1 - Numerical investigation of acoustic radiation damping in sandwich structures
AU - Baydoun, Suhaib Koji
AU - Marburg, Steffen
N1 - Publisher Copyright:
© 2019 Proceedings of the International Congress on Acoustics. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Acoustic radiation damping is the primary energy dissipating mechanism for lightweight structures with large radiating surfaces. Attempts to reduce the vibrational response of those lightweight structures by additional mechanical damping can only be successful if the extent of mechanical damping is comparable or larger than the extent of radiation damping. In this regard, engineers are in need of reliable and flexible methods for the quantification of radiation damping as well as for the modeling of its effect in an early stage of the design process. In this paper, we address the equations of time-harmonic elastodynamics and acoustics by means of finite and boundary element methods respectively. The acoustic radiation damping of a honeycomb sandwich panel is compared to the energy loss due to hysteretic material damping. Moreover, the influence of radiation damping on geometrical as well as material properties is studied.
AB - Acoustic radiation damping is the primary energy dissipating mechanism for lightweight structures with large radiating surfaces. Attempts to reduce the vibrational response of those lightweight structures by additional mechanical damping can only be successful if the extent of mechanical damping is comparable or larger than the extent of radiation damping. In this regard, engineers are in need of reliable and flexible methods for the quantification of radiation damping as well as for the modeling of its effect in an early stage of the design process. In this paper, we address the equations of time-harmonic elastodynamics and acoustics by means of finite and boundary element methods respectively. The acoustic radiation damping of a honeycomb sandwich panel is compared to the energy loss due to hysteretic material damping. Moreover, the influence of radiation damping on geometrical as well as material properties is studied.
KW - Acoustic radiation damping
KW - Honeycomb sandwich structures
KW - Structural acoustic interaction
UR - https://www.scopus.com/pages/publications/85099330594
U2 - 10.18154/RWTH-CONV-238861
DO - 10.18154/RWTH-CONV-238861
M3 - Conference contribution
AN - SCOPUS:85099330594
T3 - Proceedings of the International Congress on Acoustics
SP - 7470
EP - 7474
BT - Proceedings of the 23rd International Congress on Acoustics
A2 - Ochmann, Martin
A2 - Michael, Vorlander
A2 - Fels, Janina
PB - International Commission for Acoustics (ICA)
T2 - 23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
Y2 - 9 September 2019 through 23 September 2019
ER -