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- W1606827096 abstract "Nonlinear Normal Modes (NNMs) have a clear conceptual relation to the classical linear normal modes (LNMs), yet they offer a solid theoretical framework for interpreting a wide class of non-linear dynamical phenomena with no linear counterpart. The main difficulty associated with NNMs is that their calculation for large-scale models is expensive, particularly for distributed nonlinearities. Repeated direct time integrations need to be carried out together with extensive sensitivity analysis to reproduce the frequency-energy dependence of the modes of interest.In the present paper, NNMs are computed from a reduced model obtained using a quadratic transformation comprising LNMs and Modal Derivatives (MDs). Previous studies have shown that MDs can capture the essential dynamics of geometrically nonlinear structures and can greatly reduce the computational cost of time integration.A direct comparison with the NNMs computed from another standard reduction technique highlights the capability of the proposed reduction method to capture the essential nonlinear phenomena. The methodology is demonstrated using simple examples with 2 and 4 degrees of freedom." @default.
- W1606827096 created "2016-06-24" @default.
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- W1606827096 date "2016-01-01" @default.
- W1606827096 modified "2023-09-27" @default.
- W1606827096 title "Bridging the Gap Between Nonlinear Normal Modes and Modal Derivatives" @default.
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- W1606827096 doi "https://doi.org/10.1007/978-3-319-15221-9_32" @default.
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