3D periodic foundation-based structural vibration isolation

Abstract

Guided by the recent advances in solid-state physics research, a 3D periodic foundation-based structural vibration isolation is studied. Using construction materials, concrete, rubber and steel, the three-component periodic foundation is developed. Frequency band gaps for the specimens are found to be in low-frequency region (<20Hz). A parametric study is also conducted to illustrate the influences of the geometrical and material parameters on the frequency band gaps. Based on the frequency band gaps analysis, numerical simulations are performed to verify the efficiency of the periodic foundation. Harmonic analysis results show periodic foundation can reduce vibrations in the frequency band gap. Further, a transient analysis shows that 3D periodic foundations can also isolate seismic wave effectively.