In an offline iterative hybrid testing,the numerical calculation and test loading are performed independently in different time periods,thus avoiding the delay compensation problem.But it is difficult to converge in many nonlinear cases.Therefore,an offline iterative real-time hybrid testing method based on Newton iterative algorithm was proposed to improve the stability and iteration efficiency of the test.The numerical simulation results show that the convergence process of Newton iterative hybrid testing is much more efficient than fixed-point iteration under different working condi-tions.The convergence rate of the iterative hybrid testing is related to the inherent frequency of the structure,and the smaller the inherent frequency of the structure,the faster the convergence rate.
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