TNT Overpressure and Impulse Calculation

In summary, when looking for information on the overpressure and impulse of an explosion, it is important to consult reliable sources and seek the guidance of an expert.
  • #1
zimbabwe
35
0
After looking online and checking papers I`m not closer to get a useful result. The thing is I find some many different equations and they all give totally different answers.

[a] A wall is 3 m high and infinintly long. An explosion of 25 kg TNT is done at a distance of 10 m on the ground. What is the reflected over pressure Pr and the impulse I of the explosion on the wall? Maybe if someone would know of a could source and I`ll try again
[/a]

2. Homework Equations
Z=R/W1/3
1. P=1772/z3-114/z2+108/Z

2. P=6784(W/R3)+93(W/R3).5




1. gives 66.1 bar?
2. gives 184.3 bar?
 
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  • #2
The most reliable source for this information would be to consult a handbook of explosives or a textbook on explosives engineering. These references will provide detailed equations and diagrams to accurately calculate the overpressure and impulse of an explosion. Additionally, consulting an expert in this field can provide additional insight and advice.
 

FAQ: TNT Overpressure and Impulse Calculation

What is TNT overpressure and impulse calculation?

TNT overpressure and impulse calculation is a method used to determine the blast effects of an explosion, specifically the blast pressure and impulse, which refers to the force and duration of the blast wave. This calculation is important for assessing the potential damage and safety hazards of explosive events.

How is TNT overpressure and impulse calculated?

The calculation involves using the scaled distance formula, which takes into account the distance from the explosion, the amount of TNT equivalent used, and the characteristics of the surrounding environment. This formula is based on empirical data and is widely accepted in the field of explosion science.

What factors affect the overpressure and impulse of an explosion?

The amount of TNT equivalent used, the distance from the explosion, and the surrounding environment (such as terrain and buildings) all play a role in determining the overpressure and impulse of an explosion. The type of explosive material and its confinement also affect these blast effects.

Why is it important to calculate TNT overpressure and impulse?

Calculating the overpressure and impulse of an explosion is crucial for assessing its potential damage and safety hazards. This information is used to design structures and protective measures that can withstand or mitigate the effects of an explosion. It is also important for emergency planning and response in case of explosive events.

Are there any limitations to TNT overpressure and impulse calculation?

While the scaled distance formula is widely accepted, it does have limitations. It assumes a spherical explosion and does not take into account the effects of secondary explosions or multiple detonations. It also does not account for non-ideal conditions, such as uneven terrain or complex structures. Therefore, it is important to use caution and consider other factors when using these calculations for real-world scenarios.

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