The developments of tuned mass dampers have contributed much in the modern techniques of architectural engineering. Except for stabilizing the structures of tall buildings, they also protect them against chance of great damage brought by quakes and make the expansion of bigger skyscrapers practical.
The first mass dampers, known then as the Active Stiffness Variable System, were originally established to protect buildings in Japan. These designs were proven successful in maintaining structural steadiness of buildings during occurrence of quakes which lead the way for engineers in SUNY Buffalo to help his works by developing the Active Tendon System. Mass dampers are now generally utilized in skyscrapers, race cars, transmission lines and bridges.
Here I'm going to provide with a short top level view of tuned mass damper.
How they're Used
Tuned mass dampers have three parts; these are: spring (resilient component), mass (inertia element) and a damper (to dissipate or absorb heat energy). When the structure moves with an external force such as wind, the mass will move the spring in the alternative direction of the structure. They support an opposite force against the structure's movements to negate the swaying, therefore, keeping the structure intact.
Dampers in Buildings
Dampers can be giant concrete mass or steel bodies found on top of skyscrapers or types of buildings, moving in opposite direction to its resonance frequency vibrations that subdue the movement of the building. They can offset swaying of the building caused by wind, tremor tremors and human traffic by almost 30-40%.
Dampers in Spacecrafts
Another advice is to suppress vibration on NASA's Ares fuel booster by using 16 tuned mass dampers included in the planning of the spaceship to reduce the weight from 6g to 0.25 g. The rest will be done by traditional vibration isolators in between the upper stages and the booster.
Dampers in Power Transmission Lines
A Stockbridge damper is an example of tuned mass damper used to reduce wind vibrations on fixed wires like overhead power lines. This barbell-shaped device is made up of 2 masses at the ends of the short breadth of the wire, which is fastened in the middle of the main wire. It is positioned right between the nodes of the vibration where oscillation frequency would be more. The vibration generates movement of the damper and energy is then absorbed by the friction element within the steel wire.
Dampers in Race cars
Tuned mass dampers were initially developed and utilized by Renault for their R26 challenger in July 2006 by mounting a 9 kg mass between two suspension springs in the noses of their race cars. The tuned mass damper suppresses the car's vibrations and frequency, further stabilizing the race care while maneuvering around corners and bends and particularly when it encounters bumps, increasing the car faster down. Aside from decreasing the vibrations, the tuned mass damper also tightens front end grip which prompts increased speed on corner exits.
FIA (Federation Internationale de l'Automobile), a central body governing global vehicle racing, banned this technology because of issues this will used inappropriately, and thus may become potential safety hazards if it was extremely heavy.
The first mass dampers, known then as the Active Stiffness Variable System, were originally established to protect buildings in Japan. These designs were proven successful in maintaining structural steadiness of buildings during occurrence of quakes which lead the way for engineers in SUNY Buffalo to help his works by developing the Active Tendon System. Mass dampers are now generally utilized in skyscrapers, race cars, transmission lines and bridges.
Here I'm going to provide with a short top level view of tuned mass damper.
How they're Used
Tuned mass dampers have three parts; these are: spring (resilient component), mass (inertia element) and a damper (to dissipate or absorb heat energy). When the structure moves with an external force such as wind, the mass will move the spring in the alternative direction of the structure. They support an opposite force against the structure's movements to negate the swaying, therefore, keeping the structure intact.
Dampers in Buildings
Dampers can be giant concrete mass or steel bodies found on top of skyscrapers or types of buildings, moving in opposite direction to its resonance frequency vibrations that subdue the movement of the building. They can offset swaying of the building caused by wind, tremor tremors and human traffic by almost 30-40%.
Dampers in Spacecrafts
Another advice is to suppress vibration on NASA's Ares fuel booster by using 16 tuned mass dampers included in the planning of the spaceship to reduce the weight from 6g to 0.25 g. The rest will be done by traditional vibration isolators in between the upper stages and the booster.
Dampers in Power Transmission Lines
A Stockbridge damper is an example of tuned mass damper used to reduce wind vibrations on fixed wires like overhead power lines. This barbell-shaped device is made up of 2 masses at the ends of the short breadth of the wire, which is fastened in the middle of the main wire. It is positioned right between the nodes of the vibration where oscillation frequency would be more. The vibration generates movement of the damper and energy is then absorbed by the friction element within the steel wire.
Dampers in Race cars
Tuned mass dampers were initially developed and utilized by Renault for their R26 challenger in July 2006 by mounting a 9 kg mass between two suspension springs in the noses of their race cars. The tuned mass damper suppresses the car's vibrations and frequency, further stabilizing the race care while maneuvering around corners and bends and particularly when it encounters bumps, increasing the car faster down. Aside from decreasing the vibrations, the tuned mass damper also tightens front end grip which prompts increased speed on corner exits.
FIA (Federation Internationale de l'Automobile), a central body governing global vehicle racing, banned this technology because of issues this will used inappropriately, and thus may become potential safety hazards if it was extremely heavy.
About the Author:
The FIA International Court eventually ruled on Aug 2006 the utilization of tuned mass dampers as a breach to one of the Formula One Technical Laws. To read up about other interests of this writer, go to here.
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