Energy Distribution Analysis of Impact Signals Based on Wavelet Decompositions

Abstract

Impact signals are decomposed on orthogonal wavelet bases or wavelet packet bases. Based on these orthogonal decompositions, the energy distribution of an impact signal can be defined in two ways: (1) with respect to natural order of nodes or frequency index, representing the energy distribution at each node or frequency index; (2) with respect to time position and frequency index, providing an energy map over the time-frequency plane. Thus defined, energy distributions of impact responses can be used for the validation of finite element automobile crashworthiness modeling by comparing energy distributions between the signals from tests and simulations.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2006
Accession Number
ADA453280

Entities

People

  • Joseph A. Pellettiere
  • Walter D. Pilkey
  • Zhiqing Cheng

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Agreements
  • Air Force
  • Air Force Research Laboratories
  • Automobiles
  • Coefficients
  • Computer Simulations
  • Correlation Analysis
  • Crashworthiness
  • Decomposition
  • Engineering
  • Frequency
  • Frequency Bands
  • Military Research
  • Power Spectra
  • Simulations
  • Validation
  • Visual Inspection

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Explosive Engineering.
  • Wave Propagation and Nonlinear Chaotic Dynamics.