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Sequential parametric identification and response of hysteretic oscillators with random excitation
AbstractSequential methods are developed for estimating the parameters in a differential model of a curvilinear class of hysteretic force characteristics. In the case where the hysteretic force is directly observable it is shown that the hysteretic “loop” parameters may be identified by using either a two-stage linear estimation method or a one-stage method, based on a sequential non-linear filter. For oscillators with a non-observable hysteretic force it is demonstrated that the non-linear filtering approach can be extended to allow estimation of all the relevant system parameters, including the oscillator mass. The proposed methods are validated y application to both simulated and real experimental data. The latter was acquired during dynamic tests on a stranded steel cable, undergoing both sinusoidal and random flexural vibrations. Using identified parameters, good agreement between theoretical and experimental response statistics is obtained, in the case of random excitation.
Sequential parametric identification and response of hysteretic oscillators with random excitation
AbstractSequential methods are developed for estimating the parameters in a differential model of a curvilinear class of hysteretic force characteristics. In the case where the hysteretic force is directly observable it is shown that the hysteretic “loop” parameters may be identified by using either a two-stage linear estimation method or a one-stage method, based on a sequential non-linear filter. For oscillators with a non-observable hysteretic force it is demonstrated that the non-linear filtering approach can be extended to allow estimation of all the relevant system parameters, including the oscillator mass. The proposed methods are validated y application to both simulated and real experimental data. The latter was acquired during dynamic tests on a stranded steel cable, undergoing both sinusoidal and random flexural vibrations. Using identified parameters, good agreement between theoretical and experimental response statistics is obtained, in the case of random excitation.
Sequential parametric identification and response of hysteretic oscillators with random excitation
Roberts, J.B. (author) / Sadeghi, A.H. (author)
Structural Safety ; 8 ; 45-68
1990-01-01
24 pages
Article (Journal)
Electronic Resource
English
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