Abstract
Oil damper is widely used in engineering to dissipate the energy of vibration, increase the stability. Oil damper provide damping force due to the viscosity of the oil or effects of squeezing film. The viscous damping coefficient is one important factor of the viscous damper. The oil damper referred in this paper is one of the important parts of a machine, and the damping coefficient is of great importance to the design of the machine. The damper is an over damped single freedom system with a very small mass. The stiffness and mass of the damper can't be changed due to the structure restrict. This presented paper reports the measurement on the damping coefficient of the referred oil damper. Several measurement methods were compared, and the most appropriate one was chosen. A measurement apparatus composed of an un-contacted exciter, a response sensor, and data acquisition devices was designed and developed, and the damping coefficient was measured successfully.
