Viscous Damper Viscous Damper

Viscous Damper

Product Description


Civil buildings such as residences, office buildings, shopping malls and other multi-storey high-rise and large-span building structures, etc.

Lifeline projects such as hospitals, schools, urban functional buildings, etc.

Industrial buildings such as workshops, towers, equipment vibration reduction, etc.

Bridges such as pedestrian bridges, viaducts, etc.

Pipes and valves in nuclear power, thermal power, petrochemical, steel and other industries

Military industry

Product features 

High energy consumption efficiency, reaching more than 90%;

Reserve ±25mm length telescopic adjustment to facilitate on-site installation;

Both ends of the damper are equipped with joint bearings, which is conducive to construction and installation and work swing (allowable work swing angle ±6°);

The displacement indication is clear and clear, which is convenient for judging the position of the piston in the cylinder;

Low-speed movement resistance is small, no more than 10% of the rated load;

Hydraulic silicone oil is stable, anti-flammable and anti-aging;

Good sealing, the seals are made of rubber materials with good compatibility with the medium or metal seals;

Principle formula

F=C x Vα

F: Damping force (kN)

C: Damping coefficient kN/(mm/s)

V: Speed of piston movement (mm/s)

α: speed index, selected according to engineering requirements: when 0≤α≤1, it is a nonlinear damper, when α=1, it is a linear damper, and when α>1, it is a super-linear damper

Model selection

The selection and design can be carried out according to the following basic principles, or the relevant parameters of the installation node (including expansion displacement, working stroke, maximum damping force, damping coefficient, speed index and installation size, etc.) can be provided to our company, and we will provide you. Selection analysis and design detailed construction and installation

General principles of viscous damper construction:

(a) Selection of viscous damper load: select it according to the principle that the maximum damping force of the installation node is less than or equal to the rated load;

(b) The speed index α is generally taken as 0.1 and 0.3 when the structure is mainly seismically resistant, about 0.4 when the structure is mainly wind-resistant, and about 0.3 when the structure is designed for both wind resistance and earthquake resistance;

(c) The selection of the damper stroke can be determined according to the expansion displacement of the installation node and the size of the working stroke, and consider the stroke margin of not less than 20mm on each side. Generally, the stroke of the damper for construction is recommended to be within ±150mm. The stroke of the damper is slightly larger than the stroke of the expansion joint.


The dampers are subject to the following tests when they leave the factory:

1. Low speed movement resistance

The low-speed motion resistance of dampers of various specifications should not be greater than 10% of their rated load.

2. Power test

On the damper special test bench, complete the vibration test according to the speed and load required by the design, and make the following curve:

(1) Time-history curves of damping force (rated load), stroke and speed;

(2) The hysteresis curve of tension and compression bidirectional stroke and damping force (rated load):

(It is required that within the error range of ±15% and under the design displacement and design speed amplitude of the damper, after 30 cycles of reciprocating cycles at the basic frequency of the structure, the main design index error and attenuation of the damper should not exceed 15%)

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  • Address:​​​​​​​ 6th Floor, Apartment 1, No.66, Chengtong Road, Suzhou, Jiangsu, China 215133

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