Abstract
A technique has been developed for predicting the probability of sonic boom structural damage. This technique utilizes the probability density functions (pdf's) of the sonic boom induced stress and the material strength. Analysis of the data from experiments performed at Oklahoma City, White Sands, and Edwards Air Force Base has shown the stresses produced by sonic booms on windows to have lognormal pdf's. Similarly, analysis of the breaking strength distribution for glass plates has shown it to be log-normal. From these pdf's a statistical model has been developed for predicting the probability of window breakage as a function of nominal pressure, window size, aircraft flight path direction, and boom duration. Calculations from the model indicate a breakage probability of 1.1 breaks per million panes in good condition boomed at a nominal overpressure of 1 lb/ft2. Results predicted by the model agree well with experimental data at both high and low overpressures. [Work supported by Federal Aviation Administration.]
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