A Probabilistic One-Dimensional Ground-Shock Code for Layered Nonlinear Hysteretic Materials.

Abstract

This report describes the conversion of the WES ONED code (a deterministic one-dimensional plane wave propagation code which treats the response of layered nonlinear hysteretic media to airslap loadings) into a probabilistic code using the partial derivatives method (also referred to as the Taylor-series approximation method). This approach requires the execution of 2n+1 deterministic calculations to establish the effects of n independent (random) input variables encompassed in a given problem on the output variables (time histories of stress, particle velocity, and displacement). The probabilistic code then calculates the expected values of these time histories and their variances. All partial derivatives are evaluated numerically using finite-difference approximations. The merits of this probabilistic solution technique are demonstrated for an actual field explosive test and the code is evaluated against a closed-form probabilistic solution.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1984
Accession Number
ADA142016

Entities

People

  • B. Rohani
  • J. D. Cargile

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Classification
  • Conversion
  • Displacement
  • Engineers
  • Explosives
  • Frequency
  • Ground Shock
  • Materials
  • Measurement
  • Particles
  • Plane Waves
  • Random Variables
  • Statistical Analysis
  • Stress Strain Relations
  • Two Dimensional
  • Wave Propagation
  • Waves

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Combustion Dynamics and Shock Wave Physics.
  • Computational Modeling and Simulation