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Abstract
This paper presents a method for the dynamic identification of structures containing discrete nonlinear stiffnesses. The approach requires the structure to be excited at a single resonant frequency, enabling measurements to be made in regimes of large displacements where nonlinearities are more likely to be significant. Measured resonant decay data is used to estimate the system backbone curves. Linear natural frequencies and nonlinear parameters are identified using these backbone curves assuming a form for the nonlinear behaviour. Numerical and experimental examples, inspired by an aerospace industry test case study, are considered to illustrate how the method can be applied. Results from these models demonstrate that the method can successfully deliver nonlinear models able to predict the response of the test structure nonlinear dynamics.
Original language | English |
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Pages (from-to) | 116-135 |
Number of pages | 20 |
Journal | Mechanical Systems and Signal Processing |
Volume | 84 Part B |
Early online date | 4 Mar 2016 |
DOIs | |
Publication status | Published - 1 Feb 2017 |
Keywords
- Backbone curves
- Nonlinear Identification
- Nonlinear structural dynamics
- Resonance Decay Method
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Dive into the research topics of 'Identification of systems containing nonlinear stiffnesses using backbone curves'. Together they form a unique fingerprint.Projects
- 2 Finished
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Dynamic design tools for understanding and exploiting nonlinearity in structures
1/02/13 → 31/07/18
Project: Research
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