Response of SDF Systems to Extreme Overpressure
Publication: Journal of Engineering Mechanics
Volume 112, Issue 4
Abstract
Charts are provided for the rapid estimation of the response of an elastoplastic single-degree-of-freedom system to a decaying exponential load. The integral of the load was equated to the overpressure impulse from either the HULL code or the Speicher-Brode representation of blast wave overpressures. Plots were thus derived of the scaled duration and of the exponential characteristic parameter as a function of overpressure. Variations in both positive overpressure impulse and positive phase duration are well within the overpressure uncertainty for the scaled heights-of-burst of interest over the pressure range considered. A parametric response chart of the system is provided, which covers a very wide range of displacements, fundamental periods, and loading pressures. The chart is a graph of the results of the solution of 750 individual cases using the Newmark beta method of numerical integration.
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References
1.
Biggs, J. M., Introduction to Structural Dynamics, McGraw‐Hill Book Co., New York, NY, 1964.
2.
Fry, M. A., et al., The HULL Hydrodynamics Computer Code, Air Force Weapons Laboratory, Kirtland AFB, NM, Sept., 1977.
3.
Newmark, N. M., “A Method of Computation for Structural Dynamics,” Journal of the Engineering Mechanics Division, ASCE, Vol. 85, No. EM3, July, 1959, pp. 67–94.
4.
Norris, E. H., et al., Structural Design for Dynamic Loads, McGraw‐Hill Book Co., 1959, pp. 193–195.
5.
Speicher, S. J., and Brode, H. L., Airhlast Overpressure Analytic Expression for Burst Height, Range and Time—Over an Ideal Surface, Pacific‐Sierra Research Corp., PSR Note 385, Nov., 1981, (with update—Nov., 1982).
Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 112 • Issue 4 • April 1986
Pages: 425 - 429
Copyright
Copyright © 1986 ASCE.
History
Published online: Apr 1, 1986
Published in print: Apr 1986
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