TY - JOUR
T1 - A general concept for design modification of shell meshes in structural-acoustic optimization - Part II
T2 - Application to a floor panel in sedan interior noise problems
AU - Marburg, Steffen
AU - Hardtke, Hans Jürgen
N1 - Funding Information:
We kindly acknowledge the financial support of the AUDI AG Ingolstadt. We further thank Dr.-Ing. U. Knaust and Dipl.-Ing. Th. Adler of the AUDI AG for many interesting discussions in connection with this project. Structural model, fluid model, and superelement matrices were supplied by them. Finally, it is acknowledged that calculation were run on the SGI Origin 2000 at the Zentrum für Hochleistungsrechnen at Technische Universität Dresden.
PY - 2002/6
Y1 - 2002/6
N2 - The second part of this paper is dedicated to the application of the new concept that was outlined in the first part. Using this concept, one manipulates the geometry of a finite element shell mesh directly. Part of a sedan floor structure is chosen for this application. A plane rectangular domain of the floor panel is defined as modification domain. The number of 33 design variables consists of nine defining the global modification function and 24 that altogether define four local modification functions. It will be demonstrated in this paper that combination of global and local modification functions allows a great variety of new shapes. In the particular case of design optimization, the root mean square value of the noise transfer function is decreased by about two decibel. Contribution analysis allows to detect reasons for decrease and increase of the optimum's noise transfer function at certain frequencies in comparison to the original model. Finally, this result is discussed and compared with other results of structural-acoustic optimization.
AB - The second part of this paper is dedicated to the application of the new concept that was outlined in the first part. Using this concept, one manipulates the geometry of a finite element shell mesh directly. Part of a sedan floor structure is chosen for this application. A plane rectangular domain of the floor panel is defined as modification domain. The number of 33 design variables consists of nine defining the global modification function and 24 that altogether define four local modification functions. It will be demonstrated in this paper that combination of global and local modification functions allows a great variety of new shapes. In the particular case of design optimization, the root mean square value of the noise transfer function is decreased by about two decibel. Contribution analysis allows to detect reasons for decrease and increase of the optimum's noise transfer function at certain frequencies in comparison to the original model. Finally, this result is discussed and compared with other results of structural-acoustic optimization.
KW - Finite elements
KW - Noise transfer function
KW - Parametric model
KW - Passive noise control
KW - Shape optimization
KW - Structural-acoustic optimization
KW - Vehicle interior noise
UR - http://www.scopus.com/inward/record.url?scp=0036605054&partnerID=8YFLogxK
U2 - 10.1016/S0168-874X(01)00102-0
DO - 10.1016/S0168-874X(01)00102-0
M3 - Article
AN - SCOPUS:0036605054
SN - 0168-874X
VL - 38
SP - 737
EP - 754
JO - Finite Elements in Analysis and Design
JF - Finite Elements in Analysis and Design
IS - 8
ER -