vibration and shock

Spectral Analysis iest, tri


For random measurement data the estimate of its spectrum i.e., frequency versus amplitude is perhaps the most important descriptor of the data beyond the time history. This course is designed to provide a comprehensive introduction to the basic processing of stationary and non-stationary random measurement data for purposes of Laboratory Vibration Test Specification (LVTS) development. The first half discusses the fundamentals of spectrum analysis and illustrate Fourier based non-parametric spectrum estimation. This includes consideration of random data with embedded sine-tones. The last half considers a general framework and illustration of the development of a LVTS. The objective of the course is to provide procedures for processing field measured random vibration data and using the processed information for LVTS development. The LVTS then may be used to qualify materiel for in-service use.

Course outline     Who should attend?     Course materials     Instructor     Next date and location      Pricing Information

Course outline

  • Introduction and Purpose
  • Historical Perspective
  • Motivation for Spectral Analysis
  • General Considerations
  • Time History Classification
  • Illustration of Time History Data
  • Deterministic Spectral Analysis
  • Stationary Stochastic/Harmonic Processes
  • Nonparametric Broadband Spectral Analysis
  • Harmonic Analysis (Discrete Component Processing)
  • Measurement Time History Validation
  • Aliasing Considerations
  • Linear Time-Invariant Filtering
  • Resampling
  • Spectral Analysis via Bandpass Filtering
  • One-Third Octave Band Filtering
  • Zoom Transform
  • Product Model for Processing Special Non-stationary Time Histories
  • Basics for Laboratory Vibration Test Specification Development
    • Fatigue Damage Modeling
    • Energy Response Spectrum
  • Summary


Who should attend?

  • Practicing test engineer
  • Advanced test technican


Course materials

  • Copy of PowerPoint presentation in course binder
  • Certificate of attendance for completion of CEUs

 Continuing Education Units: .6 CEUs


Ron Merritt


Ronald G. Merritt has more than 35 years experience. He has a Ph.D. in Engineering Mechanics. Merritt has worked as a Mechanical Engineer in the Life Cycle Environmental Engineering area at the Naval Air Warfare Center Weapons Division (NAWCWD), a contractor with Jacobs Technology with work related in the same area of NAWCWD, and is presently a contractor with ATAC.

Next date and location


Registration information

Register three attendees from your company for the same training course and receive a complimentary fourth registration for another person in your company to attend that course. Contact IEST at 847-981-0100 to arrange this option. (Complimentary registration applies to registration of equal or lesser value. Not valid with any other offers or promotions.)
Registration Fees Pricing




  • Program and instructor(s) are subject to change.
  • .6 CEUs.
  • Payment must accompany registration; there is no invoicing. IEST does not accept purchase orders as a method of payment.
  • All member dues must be current at the time of registration to qualify for the member rates.
  • All education training courses earn Continuing Education Units.


IEST reserves the right to cancel course(s), in which case registrants will receive a refund of the fee. IEST is not responsible for any refund or remuneration for hotel, transportation, additional registration fees, tours, or other expenses related to attendance beyond the registration fee refund.

All orders must be paid in full at the time the order is processed. IEST does not invoice or accept purchase orders as payment. IEST reserves the right to charge a 5% administrative fee on additional transactions arising from customer order errors and a $40 fee for non-sufficient fund checks or credit card charge claims in error.

Transfers: Registrations are transferable to another person for the same event. A $35 transfer fee applies. Transfer of a member registration to a nonmember registration will be charged the difference in fees. 

Cancellations: Cancellation requests received 60 days or more prior to the start of the event will receive a full refund LESS a $75 administration fee. Cancellation requests received 30-59 days prior to the start of the event will receive a 50% refund. No refunds will be issued for cancellation requests received less than 30 days prior to the start of the event. Virtual training courses: No refunds for any reason will be issued after course instructions and materials have been sent to attendees.



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