Fluid viscous dampers in engineering structures

Fluid viscous dampers have been widely applied to architectural(including bridges)field for many years.

Application

Viscous energy dissipation damper consuming energy,as one of the great achievements of vibration reducing system in the 20th century in structural engineering industry,has been widely applied to architectural(including bridges)field for many years.Its widespread application not only greatly improves wind resistant and quake-proof capacity of structure,but saves fairly high proportion of costs when compared with traditional anti-seismic design method.Application fields cover:pipelines and valves in such industries as high-rise buildings,bridges,military,nuclear power,conventional power generation,petrochemical and steel industries etc.

Features of viscous damper

1,  Simple appearance,symmetrical and compact structure,easy installation and small installation space;

2,  Small resistance at a low speed of motion,less than 10% of nominal load;

3,  High energy consuming efficiency up to over 90%;

4,  The lugs with ball bushing are installed on both ends of damper,favorable for installing under construction and swing as operating(±6°operating pendular angle allowable);

5,  Hydraulic fluid uses stable,burning and aging resistant silicone oil;sealing element uses rubber materials having great compatibility with the fluid.

Principle formula:

F=C×Va,

F:Damping force(kN)

C:Damping coefficient(kN/(mm/s))

V:Velocity of piston(mm/s)

a:velocity exponent,designed and selected according to the engineering requirements,value is generally taken between 0.2~1.when a=1,it is linear damping.

Fluid viscous dampers in engineering structures