Abstract

This paper presents a method for comparing the Statistical Energy Analysis (SEA) and the Transfer Pass Analysis (TPA) as to the input power and the contribution rates from source power to a structure in machine operation. Identifying external forces and contribution rates from source in machine operation is important to be able to diagnose machine, equipment, and dynamic designs. SEA is based on the systems with many resonant modes, the predicted results based on the space average. TPA is based on the Frequency Response Function using the data between the excitation point and the response point. In this study, new proposal method for comparing the SEA evaluated by the power injection method and the TPA evaluated by the matrix inversion method is verified through numerical analysis using the finite element method on a simple structure consisting of two subsystems. As a result, if the damping ratio of subsystem can be comparatively large, the new proposal method is effective and quantitative.

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