Experimental Investigation and Numerical Simulation of Mode of Bolted Joints Considering Interface Stiffness and Preload

摘要

It is particularly important to evaluate the natural frequency and the natural mode of vibration of bolted joints to avoid the failure of the structure due to the resonance.The vibration characteristics of bolted joints is closely connected to surface roughness of contact interfaces, the magnitude of axial bolt force and configuration of clamping bolts.In this paper, first of all, the effect of the above factors on the natural frequencies of bolted joints is systematically investigated by experiments.Then, finite element method is proposed to analyze the effect.At last, the numerical method is validated by experimental measurements of the natural frequencies.