Application study on parametric estimation of rubber bearings using SNLSE approach
YIN Qiang; ZHOU Li; WANG Xin-ming
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(MOE Key Lab of Structure Mechanics and Control for Aircraft; Institute of Structures & Strength; Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
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History+
Received
Revised
Published
2009-10-04
2010-01-27
2010-08-25
Issue Date
2010-08-25
Abstract
Because of the complex nature of the excitation and the inherent non-linear dynamics characteristics of base isolation system, the prediction of the dynamic response of rubber-bearings subjected to strong earthquake is quite challenging. A simplified Wen model was proposed to describe the non-linear behavior of rubber bearings. Experimental tests using a particular type of rubber-bearing (GZN110) had been conducted to identify the parameters of the proposed hysteretic model. Based on experimental vibration data measured from sensors, a new system identification method, referred to as the sequential non-linear least-square estimation (SNLSE), was used to identify model parameters. The SNLSE approach has significant advantages over extended Kalman filter (EKF) approach in terms of stability and convergence of solutions as well as the computational efforts involved. Different excitation scenarios, including white noise and several earthquake, Signals were enoliyed as input signals in simulations and experimental tests. Those results demonstrate that the simplified Wen model is capable of well describing the non-linear behavior of rubber-bearings, and the SNLSE approach is quite effective for identifying non-linear hysteretic parameters and for the prediction of displacement.
YIN Qiang;ZHOU Li;WANG Xin-ming .
Application study on parametric estimation of rubber bearings using SNLSE approach[J]. Journal of Vibration and Shock, 2010, 29(8): 73-77
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