TY - JOUR
T1 - FEM-BEM-coupling and structural-acoustic sensitivity analysis for shell geometries
AU - Fritze, Denny
AU - Marburg, Steffen
AU - Hardtke, Hans Jürgen
N1 - Funding Information:
The funding of this work by the Deutsche For-schungs-ge-mein-schaft (DFG) is gratefully acknowledged. Furthermore, the authors wish to acknowledge, that the computational work was processed by the SGI ORIGIN 2000 at the Zentrum für Hochleistungsrechnen (ZHR) of the Technische Universität Dresden.
PY - 2005
Y1 - 2005
N2 - Passive noise control by modification of structural geometry moves more and more into the field of vision for designers. This structural-acoustic optimization shows high potential in minimization of radiated noise especially for thin shell geometries. Since computer systems have been enhanced dramatically in recent years numerical simulation of structural vibration and acoustic field was accelerated significantly. But still the sensitivity analysis represents the bottle neck in computational efforts of gradient-based optimization. Furthermore, the coupling between FE and BE analysis in structural-acoustic simulation of large scale models will occur as an additional challenge because of non-matching meshes. In this paper, a fast method for computation of sensitivities of acoustic properties with respect to shell geometry is presented. Therefore, a concept to parameterize the structural geometry is explained. Additionally, the coupling procedure is simplified to reduce computational effort. Finally, this method is applied to an academic example. The sensitivity of the sound pressure at an internal point of an oblique box is investigated, when one side of this six-sided box is geometrically modified.
AB - Passive noise control by modification of structural geometry moves more and more into the field of vision for designers. This structural-acoustic optimization shows high potential in minimization of radiated noise especially for thin shell geometries. Since computer systems have been enhanced dramatically in recent years numerical simulation of structural vibration and acoustic field was accelerated significantly. But still the sensitivity analysis represents the bottle neck in computational efforts of gradient-based optimization. Furthermore, the coupling between FE and BE analysis in structural-acoustic simulation of large scale models will occur as an additional challenge because of non-matching meshes. In this paper, a fast method for computation of sensitivities of acoustic properties with respect to shell geometry is presented. Therefore, a concept to parameterize the structural geometry is explained. Additionally, the coupling procedure is simplified to reduce computational effort. Finally, this method is applied to an academic example. The sensitivity of the sound pressure at an internal point of an oblique box is investigated, when one side of this six-sided box is geometrically modified.
KW - Acoustic optimization
KW - FEM-BEM-coupling
KW - Fluid-structure-interaction
KW - Gradient-based optimization
KW - Noise control
KW - Sensitivity analysis
KW - Shape optimization
UR - http://www.scopus.com/inward/record.url?scp=30344478821&partnerID=8YFLogxK
U2 - 10.1016/j.compstruc.2004.05.019
DO - 10.1016/j.compstruc.2004.05.019
M3 - Article
AN - SCOPUS:30344478821
SN - 0045-7949
VL - 83
SP - 143
EP - 154
JO - Computers and Structures
JF - Computers and Structures
IS - 2-3
ER -