|
| Nonlinear Identification Method of Typical Structure Based on Describing Function Method |
| Received:November 08, 2018 Revised:May 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.05.000 |
| KeyWord:structural nonlinear nonlinear identification describing function method |
| Author | Institution |
| ZHAO Zhong-ge |
China Aero Polytechnical Establishment CAPE, Beijing , China |
| LIU Yang |
China Aero Polytechnical Establishment CAPE, Beijing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To provide methods for identification of typical structural nonlinear. Methods Based on the basic theory of dynamics, when the typical structural nonlinear system was modeled, the nonlinear force generated by the nonlinear elements was added to the underlying linear system as a function of displacement or velocity. By analyzing frequency response function of different excitation levels, location, type and parameters of nonlinear elements were determined through the describing function method. Results The method was verified by Matlab simulation. The nonlinear elements of three different nonlinear systems were identified successfully with the describing function method. Conclusion When the describing function method is used to identify nonlinear element, the location is accurate, the type is matched, and the parameter accuracy is very high |
| Close |
|
|
|