We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Dynamic Characteristics Analysis of Gas-Bearing Rotor System Based on Fluid-Structure Coupling.
- Authors
MA Hailong; MA Wenqi; ZHENG Shaolin; QIN Yubin
- Abstract
The cutting force suffered by the machine tool in the cutting process can be assumed to be the combined force of the steady state force and the dynamic disturbing force.In order to investigate the dynamic characteristics of electric spindle system supported by gas bearings,sine wave was used as dynamic disturbance loading form,and the dynamic characteristics of a simplified model of a gas bearing rotor system were studied by combining the harmonic excitation method with the bidirectional fluid-structure coupling numerical simulation. The dynamic stiffness and damping coefficients were identified. Through modal analysis,the system vibration modes and natural frequencies of the rotor under different steady-state forces were obtained. The results show that with the increase of steady-state force,the growth rate of Kyy of the lower radial bearing is greater than that of Kxx,while the cross stiffness and cross damping are almost unchanged.The main stiffness of the lower radial bearing is greater than the cross stiffness,and the main damping is greater than the cross damping. When the steady-state force ranges from 50 N to 200 N,the y-shift at the lower end of the rotor first increases and then decreases with the increase of dynamic disturbance frequency. The resonance frequency of the system increases with the increase of the steady-state force.
- Subjects
COUPLINGS (Gearing); DYNAMIC stiffness; GAS-lubricated bearings; DYNAMIC loads; ROTORS
- Publication
Lubrication Engineering (0254-0150), 2024, Vol 49, Issue 6, p65
- ISSN
0254-0150
- Publication type
Article
- DOI
10.3969/j.issn.0254-0150.2024.06.009