Abstract
In this paper, the dynamic response characteristics of a common double shear lap joint structure with viscoelastic layer are investigated. Firstly, an analytical model is established in shear vibration based on phenomenological model. The fourth order Runge-Kutta method is employed to calculate the harmonic response, where the effect of Coulomb friction and excitation levels on system are presented. Secondly, a new nonlinear finite element model for the bolted joint structure with viscoelastic layer is developed. The simulation results show good agreement with the corresponding experimental results. Finally, the proposed harmonic excitation experiments with laser vibrometer in tangential direction are carried out to investigate the nonlinear behaviors of system, as well as the influence of bolt preload and viscoelastic material on dynamic characteristics of the bolted joint beam. The results show that the viscoelastic layer help reduce vibration at certain extent, especially in the high frequency region of vibration, and some peak frequencies of system can be changed through the viscoelastic layer.
Highlights
The nonlinear behavior of the bolted joint structure has long been studied in the context of engineering machinery
The viscoelastic layer has been widely used in various mechanical structures and has appreciable influence on dynamic characteristics of connection structures, which is mainly reflected in nonlinear stiffness and damping of interface
Due to the existence of viscoelastic layer sandwiched in bolted joint interface, in order to investigate the effects of Coulomb friction and excitation level on system under harmonic response, the corresponding dynamical behaviors are described
Summary
The nonlinear behavior of the bolted joint structure has long been studied in the context of engineering machinery. There have been few published studies discussing modeling method of bolted joint interface with viscoelastic layer to capture system's dynamic characteristics under harmonic shear excitation. The purpose of the present work is to develop a nonlinear dynamic model of bolted joint structure and investigate the influence of nonlinear factors of bolted joint interface with viscoelastic layer on system dynamic characteristics in harmonic shear excitation. To this end, an analytical model for double shear lap joint structure with viscoelastic layer is first proposed based on phenomenological model, and the dynamic responses of system under various Coulomb friction and excitation levels are analyzed. The relative harmonic experiments with laser vibrometer are investigated in detail, and show good agreement with the simulation results
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
