Abstract: Considering the shortcoming of the matrix updating methods which can not preserve the physical connectivity and has a low computational efficiently, a new updating method with an SVD(singular value decomposition) model is presented based on the theories of multi degrees of freedom vibration and SVD. Compared with matrix updating, this method inducts the matrix recomposing technology to reduce the dimension of the parameter matrix from n×2n to 1×2n, adopts the SVD theory to improve the computational efficiently and processes the updated results to preserve the physical connectivity. Finally, numerical results show the validity and feasibility of the method.

Key words: matrix updating, singular value analyze, matrix recomposing