715 周波数領域部分空間法によるモード特性同定 : 剛体運動による剰余質量の影響

概要

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It is very important to grasp the dynamic characteristics of machinery. Modal analysis is widely used as a basic technology for machine design. Various methods to identify the modal parameters of structures by the vibration test have been proposed. Recently, the frequency domain subspace method has been developed. Generally, it is easier to overview the dynamic properties of structures in frequency domain than in time domain. Therefore the frequency response functions (FRFs) are employed. In this paper, the modal parameters are identified by the frequency domain subspace algorithm. Then the residual terms derived from rigid body motions are considered. The effects of translation and rotations of the test specimen are investigated. The proposed procedure has an iteration process to modify the residual terms. The identification procedure is applied to an aluminum circle plate with a hole.
一般社団法人日本機械学会の論文
2011-09-05