Model parameter distinguishing method

Abstract

The invention relates to a model parameter distinguishing method. The method comprises the steps that an intermediate variable and parameters to be distinguished in the change process of a study object are selected as system state variables, and the relevant parameters are initialized; a system state change model and a resilience measuring model are set up; a system state predicated value of the next time point is calculated according to the state change model and the original values of all the system state variables; the resilience measured and predicted value and system resilience measured and predicted value of each sigma point are calculated; unscented Kalman filter gain is calculated; a system state optimizing estimated value is calculated; the state change model is updated. A Bouc-Wen model is pulled away from a specific civil structure model, data is adopted as drive to solve the accurate distinguishing problem of the model parameters, universality is achieved, the method can be expanded and applied to the distinguishing problem meeting or approximately meeting Bouc-Wen models among various kinds of relevant variables.

Description

technical field [0001] The invention relates to the cross technical field of information science and civil engineering, in particular to a model parameter identification method. Background technique [0002] Since earthquakes pose a serious threat to human life and property safety, more and more attention has been paid to the seismic performance of civil structures. Structural hybrid test is an effective test technique to evaluate the seismic performance of large complex civil structures. The test combines physical loading test and numerical simulation technology, and the accuracy of the structural mathematical model on which the numerical simulation depends directly affects the test results. At the same time, an important function of the structural mathematical model is to reflect the hysteretic nonlinear restoring force existing in a large number of civil structures. [0003] The restoring force-deformation Bouc-Wen model relates the structural restoring force and deforma...

AI Technical Summary

Problems solved by technology

However, the Bouc-Wen model has complex mathematical relationship expressions and parameters with unclear physical meanings. Because it is difficult to identify them efficiently and accurately, it is not conducive to the accurate expression of the mathematical model of civil structures, and is not conducive to the effective analysis of the seismic response of structures. and seismic performance

[0004] In addition, in the existing research results and technical methods, most of the Bouc-Wen model is used to describe the restoring force in the motion equation of a specific structure, and there is a great correlation between the parameters and the specific structural features, which leads to the lack of versatility of the parameter identification methods used. weak

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