EXPERIMENTAL ANALYSIS OF A SAND TAMPED EXPLOSION VESSEL

摘要

Influence of tamped sand on blast wave in an explosion containment vessel has been studied in this paper. Tamped buffer material in explosion containment vessel can attenuate shock wave and peak pressure, refrain the strain growth and self-oscillation of explosion containment vessel. However, due to the non-linear dissipation mechanism and heterogeneous properties of buffer material - sand, the attenuation exhibits some abnormal behavior that is the enhancement of shock wave. In order to analyze this problem, a series of experiments were carried out.Both air and sand were filled in the experiments for evaluation of the mitigation performance. From the experiments of given sand, it is concluded that the attenuation can be achieved if scaled distance is larger than 0.4m/kg1/3. Under this condition, enhancement of blast loading can be avoided. For the purpose of estimation on energy absorption of sand, the compression curve of sand is given by experiment, which also can be useful for numerical calculations.