Tuned mass damper
A tuned mass damper is a device mounted in structures to reduce the amplitude of mechanical vibrations. It consists of a mass that is mounted on one or more damped springs. The oscillation frequency of the mass is tuned to be similar to the resonant frequency of object they are mounted to. They are frequently used in power transmission, automobiles, and buildings.
About Tuned mass damper in brief
A tuned mass damper is a device mounted in structures to reduce the amplitude of mechanical vibrations. It consists of a mass that is mounted on one or more damped springs. The oscillation frequency of the mass is tuned to be similar to the resonant frequency of object they are mounted to. Tuned mass dampers are used to reduce maximum amplitude of the object while weighing very much less than it. Their application can prevent discomfort, damage, or outright structural failure. They are frequently used in power transmission, automobiles, and buildings. The tuned massdamper was introduced as part of the suspension system by Renault, on its 2005 F1 car at the 2005 Brazilian Grand Prix. It reportedly reduced lap times by 0.3 seconds. It was deemed to be illegal, due to the influence the mass was not rigidly attached to the chassis. The FIA appealed against that decision, but the Stewards of the Court of Appeal deemed it illegal. The Tuned Mass Damper is widely used in production cars, typically on the crankshaft pulley control on the pulley to be a movable device and hence influencing the aerodynamic effects of the car.
It is also used in buildings to stabilize against violent motion caused by harmonic vibration. A tuned damper reduces the vibration of a system with a comparatively lightweight component so that the worst-case vibrations are less intense. It has a second normal mode and will vibrate somewhat more than the baseline system at frequencies below about 6 and above about 10. The heights of the two peaks can be adjusted by changing the stiffness of the spring in the tuned Mass damper. Changing the damping also changes the height of the peaks, in a complex fashion. The split between the two peak can be changed by altering the mass of the damper. The Bode plot is more complex, showing the phase and magnitude of the motion of each mass, for the two cases.
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This page is based on the article Tuned mass damper published in Wikipedia (as of Dec. 14, 2020) and was automatically summarized using artificial intelligence.
