Nonlinear Vibration Analysis of a Rotating Disk-Beam System Subjected to Dry Friction

• Published in: Shock and vibration Vol. 2020; no. 2020; pp. 1 - 19
• Main Authors: Wen, Bangchun, Tang, Qiansheng, Li, Chaofeng, She, Houxin
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Publishing Corporation 2020; Hindawi; John Wiley & Sons, Inc; Hindawi Limited
• Subjects: Analysis; Coefficient of friction; Computer simulation; Continuum modeling; Coupling; Damping; Dry friction; Dynamical systems; Energy; Energy dissipation; Finite element method; Friction; Mathematical models; Nonlinear analysis; Nonlinear dynamics; Nonlinear response; Parameters; Rotating disks; Rotation; Studies; Vibration; Vibration analysis
• ISSN: 1070-9622; 1875-9203
• DOI: 10.1155/2020/7604174

In this work, a continuum model is proposed to simulate and interpret the coupling vibration characteristics of a rotating disk-beam system with the dovetail interfaces. The dovetail interface feature is represented by a macroslip dry friction model. The present study also derives a new mode function to simulate the vibration of a rotating beam with loosely assembled dovetail attachment. The new proposed mode function is validated by comparing the natural characteristics and vibration response with those obtained from a finite element (FE) model. At last, based on the nonlinear response results obtained by the Newmark-β method, the effects of different parameters on the nonlinear dynamics of the coupling system are discussed. The following interesting phenomena have been revealed: the flexible disk can impose different influences on the response characteristics of the rotating beam. The effects of dry friction on the beam’s energy dissipation are significant, especially at a low rotational speed. Further analysis yields that the excitation level and friction coefficient also exhibit a significant impact on the damping effect of dry friction. Consequently, it should be noted that the optimal values of the contact surface’s parameters allow achieving a better damping effect in the engineering practice.