Svenska
EnglishCivil Engineering
Vibratec supplies solutions for Civil Engineering applications such as floating floors, elastically suspend- ed ceilings, building base isolation, tuned mass dampers and suspension of rotating machinery such as fans, coolers and similar.
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Building Base Isolation
Vibration isolation of complete buidings can be done with mats, discrete pads or steel springs. Vibratec can support with everything from calculations, design and tests to delivery, installation and measurements of the vibration isolation. We also give solutions for elevator guiding rails, stairs, piping, cables and other typical sources of acoustic bridging. With discrete pads we reach down to 6 Hz in resonance frequency and with springs 2 Hz can be achieved. Low frequency solutions often call for pre-compressed packages to minimize the deflection during construction.
Vibratec can also design and supply earth quake dampers in addition to standard vibration isolators.
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Floating floors
Floating floors work by isolating the working floor from the supporting structure via elastic mats, pads or springs. Good structural isolation in the building design and adding mass to the structure are impor- tant steps to ensure an appropriate level of airborne sound isolation. Adjustable systems for both light weight and concrete floors are available as well as different discrete pad/spring systems.
Vibratec’s floor systems can be designed and manufactured to any needs whether it is a domestic, com- mercial or industrial application:
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Floors for discotheques, bowling halls, gym, cinemas
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Floors for ballet, music studios, rehearsal rooms
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Floors for washing machines and different types of industries
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Residential upgrading of existing timber joist floors to meet acoustic requirements
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Ceilings and walls
Creating a gap and inserting an elastic barrier prevents noise from vibrating through joists and ceiling. In effect, a second, separate ceiling is added which is suspended elastically.
The sound is also entering through the walls (flanking noise). The inner ceiling thus must be elastically decoupled from the walls, but at the same time be air tight. Vibratec can offer several complete ceiling and wall systems with springs or rubber elements.
Fully isolated walls are often required to prevent noise travelling between adjacent rooms or from the structure of the building. The sound insulation and vibration isolation can be improved by introducing resilient fixings to decouple the walls from each other and/or resilient strips to isolate the walls from the supporting structure.
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Vibration isolation
Whether it is a rotating or punching machinery Vibratec can design a solution by carefully choosing dy- namic and damping properties. The final result is highly depending of the stiffness of the sub-structure and the skid, when available we can add the point mobility into our calculations. For high requirements of insertion loss we design 2-mass vibration isolation.
Typical applications: coolers, fans, compressors, generator sets, elevator machinery
Tuned Mass Dampers
Tuned mass dampers stabilize against motion caused by harmonic vibration. A TMD is tuned to move the main mode away from a troubling excitation frequency and to add damping. TMD’s are typically con- crete blocks or steel bodies mounted elastically by means of springs, and tuned to move in opposition to the resonance frequency of the structure to be damped. Vibratec designs and manufacture TMD’s for both low and high harmonic vibrations. Typical low frequency applications are pedestrian bridges and skyskrapers whereas wind turbines are considered a high frequency application. Vibratec can also sup- port with installation and measurements if wanted.
