Bifurcation and chaos analysis of the porous squeeze film damper mounted gear-bearing system

Porous Squeeze Film Damper (PSFD) has been widely used in the industry and the advantages are very abundant. This study presents a systematic analysis of the dynamic behavior of a gear-bearing system with PSFD under nonlinear suspension, nonlinear oil-film force and nonlinear gear meshing force effect. It can be found that the system exhibits very rich forms of nTnT-periodic and chaotic vibrations. The bifurcation diagrams also reveal that greater values of permeability may not only improve non-periodic motions effectively, but also suppress dynamic amplitudes of the system. Therefore, we may conclude that PSFD can improve dynamic stability of gear-bearing systems. The results presented in this study provide some useful insights into the design and development of a gear-bearing system for rotating machinery that operates in highly rotational speed and highly nonlinear regimes.