Analysis of Vibration by Component Mode Synthesis Method : Part 1. Natural Frequency and Natural Mode, (I)

概要

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A method is presented to analyze the vibration of a complex mechanical structure by using the natural modes of the components. A structure is divided into some components. All components are classified into master components ana branch components. The natural modes of each component are determined separately by the finite element method. The natural modes of all components are synthesized to form the generalized system coordinates. The equation of motion under these system coordenates is solved to know the vibration of the total structure. The vibration of a rectangular plate is analyzed by this method, changing some calculative factors. On the other hand, the vibration of this specimen is measured under the harmonic exciting force to get the natural frequencies and the natural modes. The calculative results are compared with the experimental ones to check up accuracy of the calculation and availability of the proposed method. It is clear that this method is useful for analyzing the vibration characteristics of complex structures.
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