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Topology Optimization of Transient Vibroacoustic Problems for Broadband Filter Design Using Cut Elements by Dilgen, Cetin B.; Aage, Niels is a scholarly article available to read on EtoBox.

What is Topology Optimization of Transient Vibroacoustic Problems for Broadband Filter Design Using Cut Elements about?

The focus of this article is on shape and topology optimization of transient vibroacoustic problems. The main contribution is a transient problem formulation that enables optimization over wide ranges of frequencies with complex signals, which are often of interest in industry. The work employs time domain methods to realize wide band optimization in the frequency domain. To this end, the objective function is defined in frequency domain where the frequency response of the system is obtained through a fast Fourier transform (FFT) algorithm on the transient response of the system. The work utilizes a parametric level set approach to implicitly define the geometry in which the zero level describes the interface between acoustic and structural domains. A cut element method is used to capture the geometry on a fixed background mesh through utilization of a special integration scheme that accurately resolves the interface. This allows for accurate solutions to strongly coupled vibroacoustic systems without having to re-mesh at each design update. The present work relies on efficient gradient based optimizers where the discrete adjoint method is used to calculate the sensitivities of obj

Author

Dilgen, Cetin B.; Aage, Niels

Published

2023

Language

EN