A New Continuous Decay/Stribeck Friction Model

The friction model is a crucial element in the detailed analysis of the dynamics of mechanical systems across various industries. Currently, the Coulomb friction model is commonly employed to simulate tube-support interactions in steam generators within the nuclear industry. However, this model is very basic and cannot capture all aspects of friction behavior, particularly the transition from static friction to dynamic friction. In previous work, the parameters for different friction models were identified and validated using FEM (Finite Element Method). Several issues were identified, such as the discontinuity in the Stribeck or decay friction models. In this paper, we analyze this discontinuity and propose improvements by introducing a new ’ Continuous Decay/Stribeck Friction Model’ model. The identification of model parameters, their sensitivity, and their effects on the frictional behavior and dynamic response of the system are also discussed. Additionally, the limitations of this model are addressed. The experimental results presented in the works of Baumberger et al. are used for model testing and validation. Using the experimental data, the parameter identification for the Stribeck and decay friction models, as well as the new proposed friction model is done.