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- W2735263910 abstract "The nonlinear acoustic behavior of Helmholtz resonators is characterized by a data-based reduced-order model, which is obtained by a combination of high-resolution CFD simulation and system identification. It is shown that even in the nonlinear regime, a linear model is capable of describing the reflection behavior at a particular amplitude with quantitative accuracy. This observation motivates to choose a local-linear model structure for this study, which consists of a network of parallel linear submodels. A so-called fuzzy-neuron layer distributes the input signal over the linear submodels, depending on the root mean square of the particle velocity at the resonator surface. The resulting model structure is referred to as an local-linear neuro-fuzzy network. System identification techniques are used to estimate the free parameters of this model from training data. The training data are generated by CFD simulations of the resonator, with persistent acoustic excitation over a wide range of frequencies and sound pressure levels. The estimated nonlinear, reduced-order models show good agreement with CFD and experimental data over a wide range of amplitudes for several test cases." @default.
- W2735263910 created "2017-07-21" @default.
- W2735263910 creator A5044568040 @default.
- W2735263910 creator A5078077851 @default.
- W2735263910 date "2017-10-01" @default.
- W2735263910 modified "2023-09-27" @default.
- W2735263910 title "Nonlinear aeroacoustic characterization of Helmholtz resonators with a local-linear neuro-fuzzy network model" @default.
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- W2735263910 doi "https://doi.org/10.1016/j.jsv.2017.07.002" @default.
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