File:Blastcurves psi.svg
From Wikimedia Commons, the free media repository
Blastcurves_psi.svg (SVG file, nominally 600 × 400 pixels, file size: 75 KB)
Contents |
[edit] Summary
| Description |
English: Overpressure ranges from 1 to 50 psi (6.9 to 345 kPa) of a 1 kiloton air burst as a function of burst height. The thin grey curve indicates the approximate optimum burst height for a given ground range.
Deutsch: Abhängigkeit des Druckpegels einer 1-Kilotonnen-Explosion von Entfernung und Detonationshöhe. Die dünne graue Kurve gibt näherungsweise die optimale Detonationshöhe an.
|
|---|---|
| Date |
Created: 21 November 2008 |
| Source |
Own work |
| Author | |
| Permission (Reusing this image) |
See below. |
| Other versions | Image:Blastcurves_1.png |
[edit] Additional Info
Plotted with Gnuplot 4.2.2. Isobars are based on numerically solved formulae from the internal help pages of the BLAST software, the H_opt curve is an analytical fit using the inversely plotted formula
This function should fit both BLAST output and Figures 3.73a-c taken from Glasstone, Dolan, The Effects of Nuclear Weapons, 1977 (EoNW77) as a compromise. Both sources differ slightly. EoNW77 shows the maximum low-pressure ranges at somewhat lower altitudes whereas for high pressures >40 psi BLAST shows no optimum altitudes at all (see the innermost isobar). However, since numerical fitting of curves taken from a paper would be a Sisyphean task while BLAST already outputs plottable numbers, only isobars from the latter are plotted here.
[edit] Why psi?
Most sources, e.g. Glasstone & Dolan (1977) or Carey Sublette's Nuclear Weapon Archive use pounds per square inch as pressure units. As a rule of the thumb, e.g. most non-reinforced buildings are destroyed for overpressures above 5 psi. However, the pressures can easily be converted into SI units, e.g. kilopascals, where 1 psi = 6.8947573 kPa or, roughly, one psi equals seven kPa.
[edit] Additional notes
A note on Gnuplot SVG terminal: Set size variable as "fixed" (the default in Gnuplot), not "dynamic", to ensure correct aspect ratio. This was the reason for uploading a 2nd version.
[edit] Licensing
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:46, 21 November 2008 | | 600×400 (75 KB) | SiriusB (Talk | contribs) | ({{Information |Description= |Source= |Date= |Author= |Permission= |other_versions= }}) |
| 10:40, 21 November 2008 |  | 256×256 (75 KB) | SiriusB (Talk | contribs) | ({{Information |Description={{en|1=Overpressure ranges from 1 to 50 psi (6.9 to 345 kPa) of a 1 kiloton air burst as a function of burst height. The thin grey curve indicates the approximate optimum burst height for a given ground range.}} {{de|1=Abhängig) |
- Edit this file using an external application (See the setup instructions for more information)
File links
There are no pages that link to this file.
Global file usage
The following other wikis use this file:
- Usage of Blastcurves psi.svg on dewiki
- Usage of Blastcurves psi.svg on enwiki
