Clamp Nonlinear Modeling and Hysteresis Model Parameter Identification

Based on the Bouc-Wen model, a nonlinear hysteretic restoring force model is established with dynamic equations. The hardening and softening of material after reaching yield limit are described by force-displacement curve. Gamultiobj algorithm group search optimization (GSO) used to fit identify hysteresis curves, respectively. effectiveness for identifying parameters verified, effects two algorithms compared. results show that has better parameter identification ability curve fitting model. Then, describing characteristics clamp obtained through static stiffness experiment clamp. experimental fitted algorithm. As result, obtained, damping recognized. distribution statistics performed, it found each satisfies certain probability distribution, which indicates result reasonable.