Fundamentals of Random Vibration and Shock Class

Source: Equipment Reliability Institute (ERI).

Event Date: 
February 19, 2019 to February 21, 2019
Westpak Laboratory, San Jose, CA

Second Course Date and Location: October 21-23, 2019. NTS Laboratory, Orlando, FL

Course Overview:  

We’ll commence by reviewing (slowly if first-timers are present) basic vibrations, sources and causes. Then we’ll explore vibration measurements, analysis and calibration. Our discussion is supported by projected visuals and video clips. We’ll compare sinusoidal vs. random vibration with emphasis on testing systems, specifications, standards and procedures. We’ll discuss environmental stress screening (ESS), highly accelerated life test (HALT), and Highly Accelerated Stress Screening (HASS). We’ll emphasize vibration and shock test fixture design, fabrication, experimental evaluation and usage. Also shock measurement, shock response spectrum (SRS) and classical shock testing. We’ll review modal testing. Throughout, we emphasize topics you will use immediately. We will visit the onsite (location to be determined) laboratory, where we will view, hear and touch (hearing and feeling the differences between sine and random vibration) on shakers. We will perform a resonance demonstration, using first sine and then random vibration. We will demonstrate shock testing, using both a shaker and a shock test machine. Many participants have commented that this visit was a high point of the course. Many participants protectively install commercial-off-the-shelf (COTS) equipment in flight, land vehicles and shipboard locations subject to severe vibration and shock. Many participants laboratory test that protected equipment (1) to assure twenty years equipment survival and possible combat, also (2) to meet commercial test standards, International Electrotechnical Commission (IEC) documents, DO-160G, military standards such as Standardized Agreement (STANAG,) MIL-STD-810G, etc. Few if any engineering schools teach about such protection or such testing, thus, we offer this specialized course.