Overview

• SV qualification of present and future shipboard electronic equipment
• Typical SV-induced damage – description, photos, history, functional problems
• Benefits of isolating COTS electronics – reduced cost, improved designs, reliability
• Shipboard and life cycle SV conditions – combat situations modeled by ship shock
• Typical SV levels vs. performance criteria

Shock and vibration (SV) awareness

• Basic theory of isolation; technical literature beyond that provided; references
• SV tests – standards, specifications, test labs – description and documentation
• MIL-STD-167, MIL-S-901D, MIL-STD-810G testing and requirements – photos & videos
• Examples of shipboard qualification tests and data – photos and videos – details of performing a test
• Interpreting procurement specifications and test requirements – emphasize need for agreement
• Analyzing SV test data – frequencies, accelerations, displacements and velocities

Damage caused by SV testing

• Characterizing SV tests – vibration, drop tower, barge, hammer tests – videos and photos
• Review of overstress, fatigue, deterioration, degraded performance of COTS
• Measurement and data acquisition during tests, data analysis – interpretation – relevance to damage prediction

Selecting and using SV isolators

• Equipment design levels – example: COTS in equipment enclosures
• Isolator performance – showing how isolators work – demonstration videos
• Emphasize commercial passive mounts – introduce semi-active and active designs
• Types of mounts – varieties of isolators – manufacturers
• Comparison of isolator properties – elastomer vs. cable, others – stiffness, damping and loads
• Isolation system design – guidelines for selecting and locating mounts

Designing isolation systems

• Shipboard applications – different locations throughout various ship types
• Examples, features and design guidelines – design drawings, single and multiple cabinets
• Computer analysis of isolation system performance – sample calculations
• Calculation methods – FEA and modeling – videos and animations
• Use of Shock Response Spectra (SRS) – typical barge shocks – inputs and responses
• Validating results – barge and vibration test vs. predictions

Selecting electronic enclosures

• Performance requirements – design objectives, allowable SV loads, multiple directions
• Interaction of isolators and enclosures (single and multiple enclosures, workstations)
• Related aspects – rotational stiffness, sway space, airflow, access to COTS
• Equipment maintenance – replacement, upgrading of systems may require new isolators
• Proof of performance – past mistakes, what not to do

Selecting isolators and isolation systems (details)

• Matching isolator system to expected SV levels
• Isolator effectiveness – enclosure dynamics – non-linearity
• Isolators can exacerbate the problem – discussion and animations
• Examples of problems and solutions – photos, drawings
• SV analysis and examples – qualification by extension
• Avoiding retest and extra costs

Discussion of participants’ applications and projects

Design review by technical specialists

Course summary

Award of certificates