SHOCK 2.0 Theory Manual

Abstract

SHOCK is a computer program that implements the method used to generate Figures 2-52 through 2-100 for averaged reflected pressure and Figures 2- 101 through 2-149 for reflected impulse in UFC 3-340-02 Structures to Resist the Effects of Accidental Explosions . The methodology used in SHOCK was never fully documented or explained by the original authors or thereafter. Furthermore, lack of configuration management has resulted in numerous versions of the program without documentation of changes or differences. The Naval Facilities Engineering Service Center (NAVFAC ESC) has been tasked and funded by the Department of Defense Explosives Safety Board (DDESB) to document the semi-empirical method used in SHOCK, to identify and update anomalies or mistakes in the code and to create and validate a new version of the code. This report documents the history of the computer program, the updates and improvements that were carried out in the past and in the current effort, and explains the semi-empirical method in detail. The latest version of the program, SHOCK 2.0, is also validated by comparing against test data and ConWep. Results from SHOCK 2.0 for three points on a load wall are also compared with a numerical procedure that uses ConWep and Figures 2-193, 2-194(a), 2-194(b) in UFC 3-340-02 to calculate loads at various incidence angles. Details of these validations are presented in this report. The validation indicates that SHOCK 2.0, on average, does improve the results for reflected impulse and pressure. While the application has been improved, an in-depth study of the method and supporting literature indicates that the current method makes simplified assumptions and may be somewhat inaccurate. The program would be capable of computing pressure and impulse more accurately if recommended changes in Section 6.0 of this report are implemented.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2011
Accession Number
ADA548305

Entities

People

  • Cameron Stewart
  • Joseph Abraham

Organizations

  • Naval Facilities Engineering Systems Command

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Angle Of Incidence
  • Blast Loads
  • Computational Processes
  • Computer Programs
  • Computers
  • Configuration Management
  • Data Sets
  • Department Of Defense
  • Engineering
  • Explosions
  • Explosives
  • High Explosives
  • Impulse Loading
  • Literature
  • Load Distribution
  • Shock Waves
  • Validation

Readers

  • Business Analytics
  • Combustion Dynamics and Shock Wave Physics.
  • Computational Modeling and Simulation