Seismic Vibration Testing

Seismic vibration testing simulates the conditions of an earthquake to determine a structure’s response to a transient event and prevent damage in the event of an actual earthquake.

Ensure Structural Integrity

Seismic vibration testing is recommended or required for building construction, critical systems, nuclear power, lighting, and power distribution. Most often, engineers use the shock response spectrum (SRS) to design structure resonances, define seismic test specifications, and replicate failure modes. Vibration Research’s Shock Response Spectrum, Transient Waveform Control, and other software modules fulfill many of the standards for seismic vibration testing.

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Seismic Labs Using VR Products

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Fulfill Seismic Test Specifications

Generate test profiles or enter specifications with ease. The VibrationVIEW interface is intuitive and user-friendly, and the software is industry-leading. Access standard vibration testing modes built for ease of use and advanced features you won’t find anywhere else.

Full VibrationVIEW Software Package

Sine

Random

Shock

Earthquake

Shock Response Spectrum (SRS)

Transient Capture

Transient Waveforms Control

3-Axis Control

Chatter Monitor

Earthquake vibration testing software logo VR

EARTHQUAKE

Generate shock tests that conform to common seismic test specifications such as Bellcore/Telcordia and IEEE344 standards. Run a shock pulse defined by a frequency vs. G peak table, perform multi-axis control, and access various waveform synthesis generation techniques.

SHOCK RESPONSE SPECTRUM

The Shock Response Spectrum package adds SRS plots to VibrationVIEW’s Shock and Transient Capture test modes. Define SRS parameters and synthesize a pulse to meet a specified SRS curve. The package includes a variety of waveform synthesis generation techniques.

TRANSIENT CAPTURE

Record a transient waveform during data acquisition to use in post-processing. Define the triggering and data capture settings pre-test and allow the software to handle the rest. Use the captured waveform(s) alongside the acquired data or for analysis with the SRS software.

SRS Wavelets animated screen capture

Using Recorded Data to Improve SRS Development

Test engineers can select from several synthetic waveform methods to create an SRS pulse, with the best choice depending on the application. However, often there is no synthetic waveform that closely matches a real-world transient event. Therefore, engineers need a better and more realistic way to create an SRS test.

A modified user waveform based on an enveloped set of recordings maintains real-world characteristics and creates an SRS waveform that accurately reflects the recorded events.

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SRS Software

Engineers use an SRS test to evaluate a device’s response to a transient event likely to occur in the end environment. In VibrationVIEW, define the SRS parameters and synthesize a pulse to meet a specified SRS curve.

SRS Software

– EASY TEST ENTRY
Enter frequency/amplitude breakpoints of the background random acceleration spectrum in an easy-to-read tabular form. Two hundred separate frequency/amplitude breakpoints can be entered, allowing for the entry of virtually any test.

– TEST GENERATION TECHNIQUES
Supports many generation test techniques including linear and exponential chirp, WavSyn, burst random, linear and exponential-  chirp on burst random, enveloped random, and burst sine. Alternatively, iterate from a user waveform.

– MANUAL WAVELET MANIPULATION
Manually adjust the parameters of the underlying wavelets or allow VibrationVIEW to automatically create and run a test without intervention.

– DATA PLOTS
SRS pseudo velocity and SRS acceleration plots; acceleration for primary (+), primary (-), or maxi-maxi.

High Channel Count Systems

VR10500 Vibration Controller

The VR10500 is a high-powered option for advanced vibration testing. VR engineered the VR10500 to coordinate with high-channel-count and multi-shaker systems. It is an advanced hardware system for complex applications.

  • 16+ channel systems
  • Up to 512 input channels
  • Multiple shaker systems
  • Up to 6 outputs (4 analog and 2 digital)
  • Controller and analyzer combination
  • Advanced controller configurations

Shaker Compatibility

VR’s vibration controllers and vibration control software are comparable with any electrodynamic or servohydraulic shaker.

Does your lab require larger shakers? VR can help!

Our qualified sales team can work with you to select the right equipment at the right price. We’ll put together a custom package of hardware, software, and shakers for all your foreseeable testing needs.

Shakers

Large electrodynamic and servo hydrolic shakers

Chatter Monitor

Does your vibration testing involve products containing electromagnetic relays or motor contactors? If so, there is the possibility that vibration events may cause chatter in your electromagnetic relay. Vibration Research’s VibrationVIEW software offers a chatter monitoring package capable of detecting and measuring chatter events.

Whether you are involved in seismic vibration testing of a product with relays or motor contactors, concerned about possible discontinuities in your relays, or need to evaluate the acceptance criteria for your relays (IEEE 501; ANSI C37.98), VibrationVIEW’s chatter monitoring capabilities will serve you well.

Additional Software

The Transient Waveforms Control software module allows the user to create arbitrary periodic waveforms. User-defined transients offer better control of short-duration time history files, transient events, or short road load data.

User-Defined Transient/SRS Control Modification

Modify Time History to SRS screenshot

Use a synthetic pulse or user-defined time history waveform as the starting point, and VibrationVIEW will modify the wavelets to adjust the time history waveform and meet the SRS demand.

  • Minor adjustments made to the original time history
  • Meet or exceed RRS
  • Control on SRS vs. UDT
  • Adjusts wavelets to meet the required response spectrum

Test Standards

  • AASME NQA-1
  • Telcordia GR-63
  • ISO 4866.2010
  • AC-156
  • IEEE 344
  • ISO/TS 10811-1:2000
  • QME-100
  • ICC-ES AC 156
  • CAN3-N289.4-M86

IEEE-344 Earthquake Control

IEEE STD-344 defines the procedures that demonstrate that Class 1E equipment can perform during a seismic event. The equipment’s functionality must ensure that the reactor is in a safe condition after shutdown and prevent or minimize the possibility of public radiation exposure.

The VibrationVIEW software can perform several IEEE 344 procedures, including:

  • Input filtering for measurement of zero period acceleration (Annex A)
  • Multiple damping plots (Annex A)
  • Time interval waterfall PSDs (Annex B)
  • Sine beat/dwell/sweep fragility testing (Annex C)
  • Peak stress cycle counting (Annex D)
  • Coherence plots (Annex E)
  • Correlation plots (Annex E)

Bellcore (Telcordia) GR-63-Core Application

Telecommunications equipment in some North American networks must conform to hardware requirements to avoid damage or malfunction imposed by environmental stressors such as a seismic event. The Network Equipment Building System (NEBS) created the Bellcore GR-63-CORE standard (formerly Telcordia) that defines the spatial and environmental criteria for equipment in these regions.

The VibrationVIEW software can run earthquake tests that meet the Bellcore standard and any other earthquake time history waveform.

Verizon Seismic Testing with VibrationVIEW

Multi-Axis Testing

The VR9500/VR10500 can be used to control multi-shaker systems such as electrodynamic, servo-electric, and servo-hydraulic systems. Available multi-shaker control options including dual-axis with phase control, 3-axis (x-y-z) control, multi-loop (4-post) control, and earthquake controls.

Data Acquisition & Analysis Applications Summary

Full Analysis Software List

Vibration Control Applications Summary

  • Nuclear Power
  • Nuclear Quality Assurance
  • Seismic Qualification
  • Classical Shock Testing
  • Uniform Building Code
  • Pyrotechnic SRS Testing
  • Structure Evaluation
  • Component Durability & Fatigue
  • Stress Screening
  • And more…

Full Control Software List

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