Abstract
This paper presents a method for comparing the input powers and contribution rates from a power source to a structure during machine operation determined by statistical energy analysis (SEA) and transfer path analysis (TPA). Identifying external forces and contribution rates from input power sources during machine operation is important for analyzing machine, equipment, and dynamic designs. SEA is used for systems with many resonant modes, and predicted results are based on space averages. In contrast, TPA is based on estimation of a frequency response function between an excitation point and a response point. In this study, a method is proposed for comparing SEA evaluated by the power injection method and TPA evaluated by the matrix inversion method. The proposed method is validated through numerical analyses, using a finite element method, of a partial car model consisting of four subsystems. As a result, the proposed method is effective and quantitatively accurate.
