544 振動エネルギーベースモデルを用いた固有振動特性の抽出

概要

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We discuss the energy-based models including statistical energy analysis (SEA) model and energy distribution (ED) model. In the energy-based models, the structure is subdivided into subsystems such as components or/and the subsystem vibration and/or acoustic energies which are averaged in the area of subsystem and frequency band are considered. This paper suggests a method for extracting natural modes from the ED model. In the method the natural modes are identified by using the corresponding coupling loss factors evaluated by the ED model. Numerical analysis is carried out in order to verify the method and to discuss the applicapability. An U shaped-structures consisting of three subsystems is tested by using FEM calculation. As a result, it is shown that the method is useful to identify the natural modes in the structure with modal overlap factor is under an unity.
一般社団法人日本機械学会の論文
2011-09-05