Vibration Damper

What is it? why is it needed ?

We have seen a lot of sky scrapers... but how are they able to sustain any vibrations due to blowing winds, or small small earth quakes.....???

There is something which is known as Vibration Damper, which essentially means a system which dampens (lowers) the vibrations or their effect. I am here to explain you about a system i came to know...

So the picture here depicts a system in which a heavy mass is held on a rod. The whole setup is in oil. So when the building has vibration effect, the heavy mass oscillates with more amplitude on the rod. The oil obstructs the motion and hence the total energy is dissipated (in increasing the temperature of oil).

simple science - Great application isn't it??

more different dampers can be seen in the following website.

http://www.jssi.or.jp/English/eng-sib/e-sib-source.htm