Titlebook: Nonlinear Dynamics, Volume 1; Proceedings of the 3 Gaetan Kerschen Conference proceedings 2019 The Society for Experimental Mechanics, Inc.

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Inverse Methods for Characterization of Contact Areas in Mechanical Systems, by defining multi-point constraints. The presented model updating procedure assigns contact definitions (fully stuck, slipping, or no contact) in a finite element model of a jointed structure as a function of contact pressure computed from a nonlinear static analysis. The contact definitions are ad

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Experimental Characterization of a New Benchmark Structure for Prediction of Damping Nonlinearity,rization of this new benchmark structure using the Hilbert transform method applied to modally filtered time data. The nonlinear frequency and damping of each mode is characterized for various levels of bolt preload and excitation amplitude. The interfaces of the bolted structure are also characteri

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Nonlinear System Identification for Joints Including Modal Interactions,mplitudes; (ii) fitting polynomial models including coupling terms between the modes using the Restoring Force Surface Method. The proposed techniques were tested against data from a simulated 2DOF non-linear system representative of a simple jointed structure with a discrete non-linearity. This ana

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Performance of Nonlinear Modal Model in Predicting Complex Bilinear Stiffness,c structures. In this work, the nonlinear modal modeling technique is applied to a more realistic industrial aerospace structure which exhibits complex bilinear behavior. Linear natural frequencies, damping values, and mode shapes are first extracted from low level shaker testing. Subsequently, the

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System Identification to Estimate the Nonlinear Modes of a Gong,e NNMs of the system. This approach is evaluated by applying it to full-field measurements from a traditional Gong, obtained using Stereo 3D Digital Image Correlation (3D–DIC). The results obtained using system identification are validated with measurements of the NNMs obtained using force appropria

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