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Viscous Damper

Overview

A viscous damper transmits the kinetic energy generated in a structure by earthquakes, winds, and various vibrations to the viscous damper, and the kinetic energy transmitted to the viscous damper is generated while the silicone oil filled inside passes through the piston. It is a device that utilizes the principle of heat energy being converted and dissipated.

Load-rate curve as a function of α

Load-displacement curve as a function of α

speed dependence

application field

Viscous dampers are widely applied to structures and equipment for purposes such as wind resistance, earthquake resistance, and vibration reduction in various industrial fields such as buildings, bridges, plants, and military equipment. Depending on the structure, it is possible to increase the damping ratio of the structure by up to 50%, minimizing the stresses and displacements exerted on the structural members by dynamic loads, thereby improving economic performance. Also, in the case of an existing structure, there is an advantage that it can be additionally installed easily for reinforcement.

Advantages of viscous dampers

<Load reduction and displacement suppression>
Improved vibration energy dissipation performance with the application of viscous dampers reduces the acceleration and displacement response of members generated in the structure due to external dynamic loads, preventing damage to the structure.
<Optimization design by applying a commercial structural analysis program>
It can be easily analyzed with a general commercial structural analysis program, and the optimization design that adjusts the characteristic values of the viscous damper can minimize the performance improvement cost
<Reduction of construction costs and shortening of construction period>
The viscous damper is small in size, easy to install, and can minimize the stress that is applied to the structure more than other forms of damping devices, thus minimizing the cost of upgrading the structure. The seismic performance can be secured while using it as it is.
<No maintenance required>
The viscous damper has almost no temperature dependence, and reloading a small load at low speed minimizes the stress for long-term loads (temperature loads, etc.) to ensure the soundness of the structure, and no separate auxiliary equipment or external power is required. No need.
In the event of an earthquake, there is no change in performance even after the earthquake, so unlike sacrificial members, it can be used continuously.

Structure application method

performance test

Performance tester specifications

When the structure is subjected to external impact or vibration, the silicone oil filled inside the cylinder moves rapidly from the gap around the piston, causing friction between internal molecules, generating a large damping force, and transforming it into heat energy. dissipate with