Experimental study on the effect of energy absorption and wave attenuation of sand wall in ground motion under explosion

• Published in: Journal of physics. Conference series 2024-12, Vol.2891 (4), p.42013
• Main Authors: Song, Shiqian, Shi, Yongxiang, Li, Zengyue, Huang, Xiaofei, Xing, Yuanding
• Format: Article
• Language: English
• Subjects: Configurations; Energy; Energy absorption; Energy distribution; Explosions; Explosive impact tests; Frequency distribution; Ground motion; Impact analysis; Sand; Seismic waves; Shock wave attenuation; Shock waves; Vibration analysis; Vibration measurement; Wave attenuation
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2891/4/042013

Sand walls have a good energy absorption and wave attenuation effect on explosion shock waves, which can also have an impact on the seismic waves generated by the evolution of shock waves. In order to study the effect of sand wall in energy absorption on the results of explosive ground motion, four repeated explosion experiments were conducted by using different sand wall configurations. A ground motion measurement system was designed to measure the velocity at different distances from the explosion center. The measurement and analysis results showed that under the action of the sand wall, the peak velocity and the total energy based on vibration velocity both significantly decreased, fully demonstrating the energy absorption and wave attenuation effect of the sand wall. The sand wall also has an impact on the cube root similarity rate, resulting in the distribution of ground motion parameters no longer strictly following this law, but the sand wall has no significant impact on the frequency distribution. Under different sand wall configurations, the circle shaped sand wall has a better energy absorption and wave attenuation effect, while the circle shaped sand wall with nested circle shaped ends can enhance the energy absorption and wave attenuation effect by 21%.