How does a viscous damper work?
Fluid viscous dampers work based on the principle of dissipation of energy because of fluid flowing through orifices. In fluid viscous dampers, as the piston moves (e.g., from left to right or right to left), fluid flows from one chamber to another chamber through the orifice.
What are viscous fluid dampers?
Fluid viscous dampers, or seismic dampers as they are sometimes referred to, are hydraulic devices that, when stroked, dissipate the energy placed on a structure by seismic events, wind buffering or thermal motion.
Is viscous damping linear?
The free vibration of dynamic systems with viscous damping is characterized by an exponential decay of the oscillation, whereas systems with Coulomb damping possess a linear decay of oscillation.
Which type of dampers is not useful for energy dissipation?
The metallic or friction damper does not show any energy dissipation mechanism before yielding or slippage. Consequently, the metallic or friction damper is almost useless for small load which does not excite the structure over a specific loading level causing yielding or slippage of the dampers.
What is viscous damping ratio?
The viscous damping coefficient β (measured in N s/m) is a theoretical parameter able to explain the energy dissipation due to friction that slows motion. It is not an actual physical parameter as the mass m and k spring constant, which can be accessed with a simple measurement.
Why is viscous damping important?
In vibration-isolation systems it is important to have damping, to attenuate excessive vibration near resonance. In equation (3.14) it is assumed that velocity-dependent (viscous) damping is being applied. This is attractive since viscous damping does not degrade the high-frequency performance of the system.
What are the common types of damping?
2 Types of damping Types of damping are: viscous and hysteretic damping. Viscous damping depends on frequency. Hysteretic damping assumes non-linear relations between stress – deformations.
Where are dampers located?
Go into your basement or attic and find the dampers. Usually, they are positioned somewhere in the “take-offs” or “branches” of the duct system. With manual-type dampers, they have either a rod that you can adjust using a screwdriver or a lever that you can turn by hand.
Where are dampers used?
A damper is a valve or plate that stops or regulates the flow of air inside a duct, chimney, VAV box, air handler, or other air-handling equipment. A damper may be used to cut off central air conditioning (heating or cooling) to an unused room, or to regulate it for room-by-room temperature and climate control.
https://www.youtube.com/watch?v=q0dJNhB8AKU