Quietly Improving Your EnvironmentConstrained Layer Damping on Old Steel Bridge
Vibratec reduces noise on the Årsta bridge in central Stockholm. Using a techninque called constrained Layer Dampening (CLD). Noise lowered with 6 dB.
After a recent renovation of the 1929 Årsta bridge in Stockholm an increase of noise was observed. Vibratec Akustikprodukter AB has been awarded a multi-step project to mitigate the noise by use of constrained layer damping (CLD).
Step one is to investigate the noise radiation from the bridge structure, and the partial contributions from deck, girders, wheel/rail contact etc. This involve vibro-acoustic modelling by Statistical Energy Analysis (SEA), lab testing of various CLD configurations at different temperatures, as well as similar CLD tests on a mock-up plus noise and vibration measurements on the actual bridge.
Our film about how we dampened noise from commuter trains using Constrained Layer Dampening.
Interested in Constrained Layer Damping?
Feel free to contact us for more information
Contact us
News
News archive
- Infrastructure
- Construction
- Industrial
Vibratec’s springs contribute to a quieter environment at the Toompea Castle Complex
Vibratec has delivered our Spring Isolators VT4412 for an installation carried out by Egotar Grupp OÜ under HVAC equipment in the Toompea Castle Complex, home of the Estonian Parliament.
- Construction
Optimize Sound Isolation with our Ceiling System VT-CBC
Designed to provide superior sound isolation in suspended ceilings. With its double-frame structure and click-on hangers and profiles, the system effectively decouples the ceiling from the building structure, minimizing the transfer of vibrations and structure-borne noise.
