Response characteristic of acceleration forces in loose-fill cellulose insulation material caused by impact tests

Abstract

Using a wall element filled with loose-fill cellulose insulation a settling test according to the draft standard ISO CD 18393, method B was performed. The drop height and the hardness of the absorber of the test stand were varied. Acceleration was measured at the bottom of the wall element and on three levels inside the insulation. Results show that certain maximum values are not exceeded inside the insulation, although acceleration at the bottom of the wall element is rising with increasing drop height and absorber hardness. Fast-Fourier-transform of the acceleration signals shows that only low frequencies mostly below 100 Hz are transferred into the insulation body while higher frequencies were absorbed by the insulation material.