Understanding Shock Spectra and PVSS Analysis

This training module focuses on Shock Response Spectra (SRS), its background and applications. SRS analysis, especially via Pseudo Velocity Shock Spectra (PVSS), is a powerful approach to characterize shock severity of transient acceleration data. The module clearly explains the basis and limitations of SRS analysis, and then it explores numerous applications of its use to acceleration data derived from physical testing and transient FEA simulations.

Course Objectives & Benefits

• Learn what SRS analysis is really computing, its limitations, and how to properly interpret a shock spectrum
• Explore the added understanding that PVSS analysis brings, especially when presented on a four coordinate plot
• Understand the importance of having some kind of estimate of a payload’s natural frequencies when evaluating an SRS
• Learn how to convert simple shock specs (1000·G, 0.5·msec) into SRS and PVSS spectra
• Learn how to estimate stress from a PVSS and payload natural frequency
• Learn how to use SRS calculations to make fast estimates of mitigating shock severity via a shock isolator
• Learn how to turn transient FEA acceleration data into shock specs and shock screening SRS targets

Course Outline

• Shock Response Spectrum (SRS) – What is it?
• Various Forms of SRS
• Additional Details on Accel SRS & PVSS
• Estimating Shock Severity & Payload Stresses from Shock Response Analyses
• Converting Peak Accel and Time Duration Shock Specs into SRS
• Example of Applying SRS Analysis, Including Estimating Shock Mitigation Effects of an Ideal Shock Isolator
• How SRS Analysis can be Distorted by Aliasing
• How SRS Can Be Over-Estimated by Insufficiently Damped Transient Simulations
• Making a Quick Estimate of Dominant Natural Frequencies in a Component
• Creating Shock Screening Protocols
• Highlights from Exemplar Studies of Shock and PVSS
• Additional Comments on Uses of SRS
• Workshops
• The class provides several fully-solved examples including their raw data files that the attendees can explore to further solidify their learnings.

Course Duration

• Three sessions, 3 hours each (9 hours total)

Prerequisites

• Some previous exposure to shock/impact data is beneficial, but not required
• Basic understanding of digital signal processing similar to that taught in DSP Essentials module is recommended

Training Delivery Options

• Public Web Training via Zoom
• Cost: $1056
• Request a customized course for your company/organization.
• Can be delivered LIVE over the web or in-person at your site.
• You can customize content, including having use utilize one or more of YOUR datasets in workshop examples.
• Click here to request a quote.