Activities per year
The process of characterizing a nonlinearity can be defined as determining three things; location, type, and functional form. In the present study it is investigated if the random decrement technique can be used in an output-only setting for one of these; localizing nonlinear behavior. The localization is performed through a novel random decrement analysis procedure of the time history of each response measurement in a multiple degrees-of-freedom system. The analysis will detect nonlinear behavior, if present, and indicate the degree of the nonlinear behavior. A numerical test case is investigated using the analysis procedure, where a localized nonlinear element is located at various discrete locations of a T-shaped structure. Two types of nonlinearities, and three locations are investigated. Results indicate that it is not possible to explicitly determine at which degree-of-freedom a nonlinear element resides. It is, however, possible to determine which degrees-offreedom that are affected by the nonlinear element.
|Title of host publication||Proceedings of ISMA2020|
|Editors||W. Desmet, B. Pluymers, D. Moens, S. Vandemaele|
|Publication status||Published - 2020|
|Event||International Conference on Noise and Vibration Engineering - |
Duration: 7. Sept 2020 → 9. Sept 2020
Conference number: 29
|Conference||International Conference on Noise and Vibration Engineering|
|Period||07/09/2020 → 09/09/2020|
- Random vibration
- Nonlinear system identification
- Localization of nonlinearity
- Random decrement
FingerprintDive into the research topics of 'Localizing nonlinear behavior from response measurement'. Together they form a unique fingerprint.
- 1 Conference presentations