Experimental and Numerical Study on Perforated Plate Mitigation Capacity to Near-Field Blasts

Area of Science:

• Engineering
• Physics
• Materials Science

Background:

• Collective shock wave protection is crucial in various engineering applications.
• Existing passive methods are analyzed to identify areas for improvement.
• Perforated plates offer a promising passive approach to shock wave mitigation.

Purpose of the Study:

• To investigate the effectiveness of perforated plates in mitigating shock waves.
• To numerically analyze the interaction between shock waves and perforated plate structures.
• To establish a relationship between the opening ratio of perforated plates and shock wave impulse attenuation.

Main Methods:

• Numerical analysis using ANSYS-AUTODYN 2022R1^® to simulate shock wave interaction.
• Finite Element Method (FEM) based numerical model calibrated with live explosive tests.
• Experimental validation using two configurations: with and without a perforated plate.

Main Results:

• Numerical simulations revealed the interaction dynamics of shock waves with perforated plates.
• Experimental assessments confirmed the protective capabilities of perforated plates.
• A power law dependence was identified between the total impulse attenuation factor and the opening ratio.

Conclusions:

• Perforated plates are effective passive devices for shock wave mitigation.
• The opening ratio is a key variable influencing impulse attenuation.
• The findings provide a basis for designing optimized protective structures against shock waves.