Kingery_Bulmash Data Scalled standoff distance above 100 ft/lb ft/lb1/3

[Javier_Migwl]

I used the excel file from

https://files.engineering.com/getfi...6-afc3-d5fb3167b417&file=Kingery_Bulmash.xlsx

to perform a blast analysis.

The file provide data until the scaled standoff distance is equal to 100 ft/lb1/3. I need to have this measurement above 100 or until 200 probably or as close as possible to 200.

@bones206 I saw that you uploaded this excel file. Do you know where I can find the remaining data?

Have a nice day,

Xavier

 

[bones206]

The data in the excel file is sourced from the UFC charts, which stop at 100 ft/lb[sup]1/3[/sup].

Per UFC:

The curves presented in Figure 2-7 (+) and Figure 2-8 (+), which give the blast wave parameters as a function of scaled distance, extend only to a scaled distance Z = 100 ft/lb[sup]1/3[/sup]. For most protective structures, or even light structures, damage is relatively superficial beyond this scaled distance, consisting at most of broken windows or deformation of light panels or blow-out walls. But, the curves are also not extended beyond these levels because the blast wave properties start to be seriously affected by atmospheric conditions so that overpressures are very much less or very much more than the "ideal" parameters transmitted through a homogeneous atmosphere.

In the low pressure region, the pressure varies as a function of sound velocity with altitude above the ground surface. At very far distances from an explosion (Z= 1000 ft/lb[sup]1/3[/sup]), the peak pressures (really sound pressures at these levels) can be ten times greater, or more than ten times less than the ideal pressures for a homogenous atmosphere.

Even with enhancement caused by real atmospheric conditions (also called blast focusing), the pressures are still quite low and structural damage should be superficial. If it is necessary to predict such low levels, one should obtain and study more detailed reports listed in the bibliography.

 

[Javier_Migwl]

Thank you @bones206. Do you know a document that provide Z > 100 lb/kg1/3?

Also, which table includes the data until Z = 100 lb/kg1/3?

 

[bones206]

I would have to research the bibliography to find that information, I do not know.

It's been years since I worked on this topic, but I don't think I could find the chart data in tabular form anywhere. I obtained the data points using a software utility that can trace plot curves.