A concept for the modification of the geometry of a curved shell structure for minimizing radiated sound power
by
Denny Fritze
Technische Universitaet Dresden
Coauthors: Steffen Marburg, Hans-Juergen Hardtke

Radiated sound power by shell structures can be reduced by modification of the geometry. This causes local changes of the stiffness of the shell structure. To obtain a low number of design variables a concept of modification is introduced, which allows an unequivocal modification of the finite element model. For curved surfaces an assignment plain is defined to describe position of nodes of the finite element model with only two parameters. On the assignment plain continuous modification functions are deployed which can then be transformed to modify the position of the nodes. In order to reduce radiated sound power within a certain given frequency range this concept is applied for an optimization of the variables.

Date received: February 11, 2002

Copyright © 2002 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cago-42.