Determination of Isolator Properties and Incorporation into a Simulation Model

Spring isolators are commonly introduced between machines and foundations to attenuate structureborne energy. Properties at low frequencies are relatively well established. However, many industries are beginning to be concerned propagation of structureborne energy in the middle frequency range. The current work looks at comparing assessment of vibration transmissibility using measurement, finite element simulation, and a simple analytical approach which includes longitudinal wave propagation. After validation of the isolator properties, the model is then used to predict the response of a more complicated system in the mid-frequency range.