Accession Number:

AD0291571

Title:

CLOSURES FOR HARDENED PROTECTIVE HANGARS

Descriptive Note:

Corporate Author:

MRD DIV GENERAL AMERICAN TRANSPORTATION CORP NILES ILL

Personal Author(s):

Report Date:

1962-08-01

Pagination or Media Count:

1.0

Abstract:

The use of aerodynamic spoilers and deep debris pits in front of hardened aircraft shelter entrances to reduce air blast loads on the entrance structure is examined. The problems of analytically predicting air blast loads under these conditions are discussed. Probability of survival for shelters designed to withstand overpressures reached near the vicinity of the craters edge for nuclear weapons is given. Based on limits prescribed by maximum probability of survival considerations, the possibility of reproducing nuclear blast conditions in the shock tube is discussed. An extensive shock tube test program, which evaluated the effectiveness of a number of shapes and sizes of spoilers over a wide range of shock strengths, is described. The results of these tests are presented in a manner which provides blast load data for the dynamic design of entrance structures. Emphasis is given to the alleviation of blast loads on the vertical closure for an earth-covered arch or cylinder shelter. This type of entrance had been shown to be the most practical for aircraft shelter in an earlier phase of the project. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE