Research on the Shock Wave Overpressure Peak Measurement Method Based on Equilateral Ternary Array.

Area of Science:

• Geophysics
• Shock Wave Physics
• Measurement Science

Background:

• Ground shock wave overpressure measurements are prone to significant errors due to complex field conditions.
• Existing measurement techniques struggle with accuracy in dynamic and interfering environments.

Purpose of the Study:

• To develop and validate a novel pressure measurement model for ground shock waves.
• To assess the impact of array size, incidence angle, and velocity on measurement precision.
• To compare the performance of the novel method against a dual-sensor array.

Main Methods:

• Utilized the Rankine-Hugoniot relation and an equilateral ternary array configuration.
• Conducted detailed numerical simulations to analyze parameter influences.
• Performed static explosion tests with TNT charges to validate simulation results.

Main Results:

• The equilateral ternary array method demonstrated strong anti-interference capabilities.
• Reduced peak overpressure error from 17.73% to 1.25% compared to direct sensor measurement.
• Achieved velocity-based measurement of overpressure peaks with a maximum error of 3.59% for peaks up to 9.08 MPa.

Conclusions:

• The equilateral ternary array offers a significant improvement in the accuracy and reliability of ground shock wave overpressure measurements.
• This method provides a robust solution for reducing errors in challenging field environments.
• The findings support the application of this technique for precise shock wave characterization.