Adaptive substructure testing method based on least square

Numerical substructures adopt assumed hysteretic model in traditional substructure tests. The difference between the assumed model and true model might bring the extra large test error. To diminish the negative effort caused by the inaccuracy of the restoring model of numerical substructures, the hysteretic model of experimental substructures is identified on line and model of the part in numerical substructures which has the same hysteretic behavior with the experimental substructure is updated on line. The method is called adaptive substructure testing method. The hysteretic parameter estimating formula based on least square specified to Bouc-Wen model is derived and hysteresis on-line identification method is presented. Adaptive substructure pseudo-dynamic test is simulated. The simulation results show that adaptive substructure pseudo-dynamic testing method has good accuracy, efficiency and robustness.