Study of a novel squeeze film damper and vibration generator

A novel squeeze film damper and vibration generator (SFD&VG) is proposed as an option in the vibration control field. The SFD&VG can be used as an act ive squeeze film damper (ASFD) or as a vibration generator (vibrator), for unidimensional vibration damping or generation. The SFD&VG concept is conne cted with current reseal-ch to improve a common industrial process-drilling of deep holes. The SFD&VG is based on the variable area of the lubricant f ilm, which allows the development of a variable force, and a change in flui d film stiffness and damping. The analysis is initiated for an elementary c onfiguration of the SFD&VG-the infinite width Rayleigh step case-and then i t is developed for an advanced elliptical SFD&VG. The Reynolds equation is solved for both pure squeeze film effect which provides vibration damping, and pure hydrodynamic wedge effect which provides vibration generation. The theoretical part is continued with the SFD&VG dynamic simulation; The SFD& VG experimental device and vibration measurements, performed for the two de fined regimes, ASFD and vibration generator are presented Finally, the expe rimental and theoretical results are briefly compared.