Abstract
Based on the finite element analysis and modal analysis, the vibration characteristic parameters and the law of behaviour changes in different bolted connection structures were studied. According to the different contact status of each component and bolt, the 16 typical working conditions were designed and selected, and the subspace iteration method was used to simulate the experiment with the ANSYS Workbench software. The simulation results showed that the natural frequency of the double-bolted connection structure tends to be stable under different working conditions. A certain degree of fluctuation of the natural frequency sometimes occurred, but the fluctuation range was not large. This research thus laid the foundation for subsequent structural health monitoring and diagnosis.
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