Parameter identification and experiment of bolted joint structure based on response sensitivity analysis approach
A sensitivity analysis approach is proposed for the identification of bolted joint models using Bouc-Wen model,in order to discover the contact-friction energy dissipation properties from rate-inde-pendent aspect.Firstly,the parameter identification problem is simplified into a nonlinear least squares problem which can be solved by gradient algorithm,and the gradient response sensitivity analysis of Bouc-Wen model is carried out.Then,the hysteretic response of bolted structure is studied by finite ele-ment simulation.The Bouc-Wen model parameters are identified by response sensitivity method,and the effectiveness of the proposed method is verified.Finally,based on the quasi-static experimental study,the bolt-connected structure model is calibrated and used to predict hysteresis curves under other loads.The results show that the Bouc-Wen model can not only avoid the strong nonlinear and rigid equations caused by the discretization of the traditional Iwan model into Jenkins elements,but also can effectively characterize the hysteretic response of bolted structures.
bolted jointparameter identificationsensitivity analysishyteresisBouc-Wen model
国家科技期刊平台
NSTL
万方数据
维普
