Study on accuracy of online and offline models updating hybrid test
In order to improve the simulation accuracy of numerical substructures in hybrid test,researchers have proposed hybrid test based on online model updating method and offline model updating method.To compare the simulation accuracy of the two model updating methods and investigate the influence of the number of model updating components on the test accuracy,in this paper,by taking the maximum horizontal restoring force of components under seismic action as the basic index,the component weight coeffi-cient is calculated to evaluate the influence of model updating components on the accuracy of hybrid test,and then OpenSees software is used to carry out online and offline model updating virtual hybrid tests under 12 working conditions for frame structures with BRB support.The results show that with the increase of the number of model updating components,the offline model updating method and the online model updating method have different degrees of improvement in the accuracy of the hybrid test.Due to the advantages of the offline model updating method in parameter identification,the simulation accuracy is relatively improved and will be higher than that of the online model updating method after the number of model update components exceeds a certain number.Based on the research results,selecting the components with large weight coefficients as the experimental substructure and updating the numerical substructure at the same time can greatly improve the experimental accuracy,and the research results provide a reference for the selection of model updating method and model updating strategy.
hybrid testonline model updatingoffline model updatingcomponent weight coefficientparameter identification
万方数据
维普
