A New Iterative Method for Condensation of Structural Matrices

In order to reduce the degree of freedom of finite element models to make it consistent with corresponding experimental degree of freedom, based on the modified system eigen-equation, a new iterative dynamic condensation formula, which reflects the transforming relation between system's major and minor degrees of freedom has been deduced. Through numerical calculation and comparison with the existed iterative dynamic condensation formulas, the new formula's convergence rate is quicker with better stability and higher accuracy.