Analysis of Nonlinear Vibration Response of Bolt Fixed Cantilever Beam under Harmonic Excitation

摘要

The local nonlinearity introduced by the bolt assembly are one of the major reasons for the complex dynamics response characteristics of the photoelectric measurement and control equipment. The single-bolt fixed cantilever beam model is adopted to analyze the super harmonic nonlinear response of structure induced by the local nonlinearity in bolt joint connection structure which is widely used in mechanical structures. The implicit dynamic simulation method is utilized to analyze the phase trajectory curve. The amplitude of super-harmonic response is more important than the amplitude of forced excitation under excitation frequency of 1/2 times the resonance frequency. The system exhibits quasi-periodic motion and resonance frequencies exists harmonic components under forced excitation of specific frequency load.