A method to investigate the influence of geometry parameters on the vibroacoustic behavior of Kelvin cell foam

Abstract

The Kelvin cell is widely recognized as a simplified representation of porous structures. In this study, experiments and simulations are used to investigate the vibration behavior of foams based on Kelvin cells. To study different foam geometry parameters, such as hole position, size, and so on, we design 3D-printed measurement samples. Tests are conducted through laser vibrometry and contact transmission measurements for vibroacoustic behavior. Simulations combining the Finite Element Method and Boundary Element Method are conducted and the models are validated by comparing measurement results. Subsequently, we use the simulation to investigate the influence of geometry parameters of Kelvin cell foam with real-size holes on the vibroacoustic behavior. The results of this study provide a basis for further research on the design of porous structures used for vibration isolation of small machinery and devices.