Posts Tagged with Tuned Mass Dampers

Monumental Staircase Vibration Abatement Using a Tuned Mass Damper-4

To effectively address the vibration issues of a monumental staircase in a healthcare educational facility,  DEICON supplied and three tuned mass dampers (TMDs) and have them integrated into the structure. The TMDs were designed and calibrated to target the first bending mode of vibration of the staircase, thereby significantly enhancing its stability and ensuring a […]

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Hydraulic Cylinders Configured as Viscous Damping Devices

Connecting the two sides of the piston in a double-acting, double-rod cylinder through an external adjustable flow control needle valve, transforms the cylinder into a fluid viscous damping device (VDD). Vibrational motion prompts the fluid to transfer from one piston side to the other via the flow control valve, dissipating vibration energy due to the […]

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Gymnasium Floor Vibration Mitigation Using Tuned Mass Dampers

In modern gymnasiums, floor vibrations caused by various activities can be a significant issue, particularly when the gym is situated on higher floors of a multi-story office building. DEICON recently addressed this challenge by supplying two tuned mass dampers (TMDs) to mitigate vibrations in the floor system of one such gym on the 2nd floor […]

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Viscous Damping Devices Rebuilt

After 20+ years of operation, the 8 viscous damping devices of the 4 tuned mass dampers needed to be rebuilt. DEICON was commissioned to do this task by changing all the components of the viscous damping devices with their equivalent brand-new ones, testing the rebuilt units, and adjusting their damping coefficients.

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Vibration Control of Long Span Balcony in a Church Using Tuned Mass Dampers

Upon having the construction of a new church near completion, walking induced vibration was perceived on a long span balcony. DEICON conducted on-site measurements and identified the first two natural frequencies of the balcony. In addition, the participating mass and the damping ratio of mode 1 of the balcony were evaluated. DEICON designed and fabricated […]

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Vibration Control of Long Span Balcony in a Church Using Two Tuned Mass Dampers

Upon having the construction of a new church near completion, walking induced vibration was perceived on a long span balcony.  DEICON conducted on-site measurements and identified the first two natural frequencies of the balcony.  In addition, the participating mass and the damping ratio of mode 1 of the balcony was evaluated.  Tuned damping was used […]

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Vibration Isolation System for a Large Industrial Process Equipment

DEICON designed and fabricated the components for vibration isolation of a massive 110,000 lb, industrial process equipment, subject to random perturbation. The isolators used in the random vibration isolation system are made up of low-stiffness coil springs paired with viscous dampers. Motion control schemes were incorporated into the isolation system to manage the lateral excursion […]

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