A direct updating method for damping and stiffness matrices
YUAN Yongxin 1,DAI Hua 2
1.School of Mathematics and Physics, Jiangsu University of Science and Technology, Zhenjiang 2120032.College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016
Abstract：An efficient numerical method for updating the damping and stiffness matrices simultaneously using a few of complex measured modal data is developed. By applying the singular value decomposition, the optimal corrected damping and stiffness matrices that satisfy the equation of motion are found in a weighted Frobenius norm. This model updating method is direct and the updating process is very simple. Numerical results show that the presented method can be used to update the finite element model to get better agreement between analytical and experimental modal parameters.
2009, Vol. 28 
