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- Title
Nonlinear vibrations of bolted flange joint plate system considering the stick–slip–separation state: theory and experiment.
- Authors
Xing, Wu Ce; Wang, Yan Qing
- Abstract
The contact states including stick, slip, and separation can occur at the bolted joint interface of bolted flange joint structures, which significantly affects and complicates the vibration characteristics of connected structures. However, the mechanism of the influence of these three contact states on structural vibration is still not well understood. This paper establishes a universal theoretical model of bolted flange joint plate systems considering the stick, slip, and separation states simultaneously, which can be extended to a structure with an arbitrary number of bolts and plates. The bi-linear hysteretic model is adopted to model the three contact states. The contact pressure between the bolts and flanges is considered as two-dimensional distribution form, which is closer to real contact situation. Based on the Kirchhoff plate theory, the energy functions of plate and flange are obtained. Further, the nonlinear dynamic equation is derived using Lagrange equations, and solved by the Newmark-beta method. The experimental studies are performed on a plate system connected with bolted flange joint to illustrate the effectiveness of the theoretical model. The results highlight the influence of separation state and friction coefficient on the vibration response. It is found that as the tightening torque decreases, the resonance amplitude increases due to the occurrence of interface separation. The slip state can cause the nonlinear softening property, but this property will weaken when the separation occurs at bolted joint interfaces.
- Subjects
BOLTED joints; KIRCHHOFF'S theory of diffraction; STRUCTURAL dynamics; ENERGY function; IRON &; steel plates; RECTANGULAR plates (Engineering)
- Publication
Nonlinear Dynamics, 2024, Vol 112, Issue 11, p9017
- ISSN
0924-090X
- Publication type
Article
- DOI
10.1007/s11071-024-09548-1