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Parameter Identification of Elastic Multilayered System in Consideration of Measurement Accuracy
Matsui, Kunihito,KIKITA, Yukio,ABE, Yoshihisa,Watanabe, Noriaki 대한기계학회 1996 International Sessions in Celebration of the 50th Vol.1 No.1
A method to estimate layer moduli of an elastic multi-layer system from impulsive force on the surface of the system and the corresponding surface deflections is presented. Large degrees of freedom required to describe the system by FEM are drastically reduced by employing Ritz vectors. Scaling of a normal matrix is introduced to decrease a condition number of the matrix. The normal equation is solved by singular value decomposition considering a possible reduction of the normal matrix based on the criterion that reflects the accuracy of the measurement data and the precision of the floating-point arithmetic being used.