Shock Response Spectra Strengths and the Methods to Supplement and Reduce Abuses and Alternatives


The shock response spectrum (SRS) is the most frequently used method to characterize shock in spite of its limitations. The origin of the SRS, calculation of the SRS, strengths of the SRS and abuses of the SRS will be discussed. Methods to supplement the SRS and to reduce the abuses will also be discussed.

Course outline     Who should attend?     Course materials     Instructor


Course outline
  • Origin of the SRS
    • Definition
      • Absolute acceleration
      • Relative displacement
      • Psuedo velocity
    • History
    • This presentation will concentrate on oscillatory shocks
  • Calculation of the SRS
  • Strengths and weaknesses of the SRS
    • MDOF systems and the SRS
    • Common faults corrupting SRS
    • Correction using wavelets
  • Supplement with duration
    • Definition of rms duration
  • Energy methods
    • Definition
      • Fourier "energy"
      • Mechanical energy
    • Calculation
    • Modal decoupling
    • 1st mode usually dominates
    • Relationship between Input energy, Fourier energy, and psuedo-velocity
  • Synthesis of time histories to match SRS and input energy
  • Shock testing on shakers
Who should attend?
  • Personnel who acquire shock data
  • An analyst using shock data
  • Personnel who specify shock tests
  • Personnel who perform shock tests

Course materials
  • Copy of PowerPoint presentation in course binder
  • Certificate of attendance for completion of CEUs
Continuing Education Units: .3 CEUs

Instructor

David Smallwood

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