심해용 라이저 손상추정을 위한 기초연구

Abstract

In this study, damage detection method using FE model updating is proposed. A stiffness matrix of the structure is modified by sensitivity-based FE model updating method. Sensitivity analysis is used to update the FE model, and natural frequencies and zero frequencies are considered as target parameters to supplement the information of vibration characteristics. The locations and values of the damages are estimated from modified the stiffness matrix. Several numerical examples are considered to verify the performance of the proposed method. frequencies and zero frequencies are considered as target parameters to supplement the information of vibration characteristics. The locations and values of the damages are estimated from modified the stiffness matrix. Several numerical examples are considered to verify the performance of the proposed method.