Bi-Axial Seismic Exciter


The LINK Bi-Axial Seismic Exciter is designed to accurately reproduce seismic events accurately. Horizontal and vertical tests can be run independently by rotating the actuator. This provides a cost-effective solution for performing statistically independent motions in the X, Y, Z directions without off-axis motion concerns.


Key Benefits

  • Special low noise linear bearings provide a rigid bearing structure without the expense and maintenance of hydrostatic bearings
  • Sine sweep: operator defined frequency range and linear or logarithmic rate, with defined acceleration level
  • Linear Bearing design provides high resistance to over-turning moments, preventing off-axis motion
  • Designed for attachment to customer seismic mass, varying sizes available with seismic mass
  • Low friction linear bearings and hydrostatic bearing actuator provide reduced harmonic distortion
  • Shipped as an integrated system reducing installation time


  • Seismic
  • Packaging
  • Electrical component


Table Sizes
600mm x 600mm (24” x 24”)
800mm x 800mm (31.5” X 31.5”)
1M X 1M (39.5” X 39.5”)
1.5M x 1.5M (59” x 59”)
Other table sizes upon request
Frequency range: 0.1 to 100 Hz, or greater
upon request
Hydrostatic Bearing Actuator
Seismic Accelerometer

Test Procedures

  • IEEE-344 IEEE Recommended Practice for Seismic Qualification of Class 1E Equipment for Nuclear Power Generating Stations
  • IEEE-682
  • GR-63 Tests


Bi-Axial Seismic Exciter Brochure