A Method for Joint Stiffness Identification

The most troublesome problem encountered in the dynamic simulation of a real system is the difficulty of knowing the accurate system parameters. Complex structures are usually composed of several substructures with joints to connect them together. These joints have considerable effect on the behavior of the assembled structure and must be accurately modeled.In this paper an efficient method is proposed for estimating joint stiffness parameter based on regression analysis; only natural frequencies are required in extracting the joint stiffness parameters. Numerical simulation results are presented involving identification of the boundary conditions of an elastically restrained beam.