Abstract
AbstractLarge (∼45.4 kg) hemispheres of C‐4, detonated on the ground, were instrumented to measure blast parameters at scaled distances between 0.53 to 1.78 m kg−1/3. The results from free‐field and reflected pressure gauge measurements made inside and just outside the maximum extent of the fireball are presented. They show that the predictions from a particular table for scaled TNT charges are broadly consistent with the time‐of‐arrival, initial peak pressure, positive duration and positive impulse measurements. However, this agreement is poorer through the location of the primary and secondary (delayed) fireball (0.71–1.48 m kg−1/3), but better closer in and further away. Additionally, for individual detonations with closely located gauges, significant variations between peak pressures and times‐of‐arrival are measured. This suggests a strong effect from the interface instabilities present in the near‐field.
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