Dynamic analysis of composite structure on contact condition

Nonlinear contact boundary condition results in that the dynamic analysis of composite structure becomes a technical difficulty in finite element analysis. A modal analysis and stability analysis of the contact behavior for composite structure are provided, by directly adopting contact element and nonlinear algorithm instead of the empirical method. Based on the factors that affect the stiffness matrix of composite structure when analyzing contact algorithm and the mechanics of linearized system, the modal of united construction under pretightening force, the influence of different friction coefficients for composite structure mode are discussed, and the anti-jamming ability of composite structure under different pretightening forces is calculated. The conclusions and principles obtained can be taken as a guide for dynamic analysis for other composite structures. In addition, for the past analysis method, the randomicity and incorrectness of the calculation results, which are caused by different users and their different analysis experiences, can be excluded. It breaks a new path and provides a new method for the dynamic analysis of composite structures.