A dual degree of freedom model for ferromagnetic ring overload analysis

This paper proposes a ferromagnetic ring overload simulation analysis method and system based on a dual degree of freedom model at Hubei University of Technology. Adopting a dual degree of freedom nonlinear dynamic equation, a dual degree of freedom overload theoretical model is established for the overload testing fixture during free fall impact on the experimental platform. Based on the dual degree of freedom overload theory model, a finite element modeling method is adopted to establish an equivalent simulation model of the vertical impact table through material constitutive analysis, setting boundary conditions, and contact conditions. Based on the equivalent simulation model of the vertical impact table, the entire impact process is calculated using explicit dynamics to obtain dynamic signals near the edge points on the impact table. By inverse filtering the acceleration signal in the dynamic signal, the simulated overload curve of the fixture is obtained. The proposed general method for optimizing the vertical impact platform theory and simplifying simulation has improved simulation efficiency, and the overload analysis results have high accuracy, which can be widely applied in other long-time overload impact analyses.