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Plain Linear Bearings in Earthquake Simulators

Plain Linear Bearings in Earthquake Simulators

Linear Pillow Block Bearing

Plain bearings stand up to the earthquake test

Simplicity® linear bearings have been installed in an earthquake simulation machine developed by the Washington University Structural Control and Earthquake Engineering Lab (WUSCEEL) in St. Louis, Missouri. Due to their ability to tolerate intense shock and vibration without fretting and require no added grease or oil, the PBC Linear plain bearings were perfectly suited to handle the job.

Intense shock vibration is an obvious pre-requisite to study the impact of earthquakes and structure analysis. To recapture the conditions of an earthquake, researchers construct what is typically referred to as a “shock table”. A shock table is a machine that simulates the conditions of an earthquake. The entire structure weighs up to 850 lbs, and when vibrating can exert 3-4 g’s of force on the bearings and shafting.

Components:

Linear Bearings, Linear Plain Bearing Pillow Blocks

Retrofit or OEM:

OEM

Problem:

Intense shock vibration is an obvious pre-requisite to study the impact of earthquakes and structure analysis.

Solution:

Plain linear bearings from PBC Linear were implemented due to their ability to tolerate intense shock and vibration without maintenance.

The PBC Linear solution

Simplicity® plain linear bearings and pillow blocks, when combined with PBC Linear ceramic coated shafting, provided reliable performance in the WUSCEEL shock table for earthquake research. Featuring a proprietary FrelonGold® liner in the inner diameter, these bearings enhance load capacities and dampen shock vibration, with no rolling elements to fret or seize, eliminating the potential for catastrophic failure in heavy-load, short-stroke conditions. They ensure smooth, quiet, and long-lasting linear motion in the harsh environment of the shock table, resisting dirt, heat, and vibration. The WUSCEEL shock table is used for a wide range of structural analysis, including bridge and building stability research, fragility curves, and vibration control of aerospace systems. By enabling experiments on structures and materials affected by earthquakes or high-vibration surroundings, these bearings supported researchers in discovering new ways to build earthquake-resistant bridges, more reliable airplanes, and stronger buildings.

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