Viscous damper is a velocity dependent structural energy dissipation and vibration reduction device designed and manufactured based on the principle of damping force generated by the interaction between viscous fluid and damper structural components. When an engineering structure vibrates under load, relative motion occurs between the piston of the viscous damper installed in the structure and the cylinder body. Due to the pressure difference between the front and rear of the piston, the viscous fluid passes through the damping channel, generating damping force to dissipate the vibration energy input into the structure from the outside, achieving the goal of reducing structural vibration. Viscous dampers are generally composed of cylinder sleeves, pistons, damping media (viscous fluid), piston rods, and joint bearings. The damping channel is generally set on the piston, and when the piston moves, the damping medium passes through the damping channel on the piston to generate damping force
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