Mode analysis
Abstract
When a steel bar is hit by a hammer, a clear sound can be heard because the steel bar vibrates at its resonant frequency. If the bar is oscillated at this resonant frequency, it will be found that the vibration amplitude of the bar becomes very large. Therefore, when a machine is designed, it is important to know the resonant frequency of the machine. The analysis to obtain the resonant frequency and the vibration mode of an elastic body is called ‘mode analysis’.
The finite element method (FEM) analysis makes it possible to obtain the vibration mode for a various complex shape of an elastic body. In this chapter, vibration modes and resonant frequencies of a straight beam, a HDD suspension, a one axis moving table ...
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