Contact stiffness estimation based on structural frequency responses

摘要

Contact stiffness is a key in the FEA modeling of objectives involving contact. The present invention theoretically derives a new method for estimating the contact stiffness based on the base mode of structural frequency responses. The method provides both physical insight and practical guide in contact stiffness estimation, thus avoiding the ambiguity that confronts the contact stiffness estimation in commercial FEA developments and FEA applications. The method works particularly effectively in cases when the objectives under deformation include shell or beam elements. It can alleviate the convergence difficulties and improve the convergence speeds due to overestimated contact stiffness based on the underlying element.