Questions tagged [vibration]

Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point. The oscillations may be periodic such as the motion of a pendulum or random such as the movement of a tire on a gravel road.

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5answers
5k views

Do aircraft cabins have suspension?

On cars, we have 'shock absorber' suspension that decouples the passengers and loads from the road vibrations, bumps etc. On planes do we have any form of suspension that decouples the passengers &...
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2answers
118 views

Main structural (and any other) impact of hard landing

I was reading this question related to the parts suffering the most G forces. Reflecting about that question I question myself about hard landing, which is not a normal operation. So, my especific ...
3
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3answers
172 views

Is there any alternative to isolating the vibration of an ultralight engine other than using engine mounts?

Is there any alternative to isolating the vibration of an ultralight engine other than using engine mounts?
7
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1answer
3k views

What is the range of frequencies of vibration in a helicopter due to the main rotor alone?

Vibration in helicopter can be caused by many different reasons. I am interested to know what is the range of frequencies of vibration due to the main rotor alone? I understand that it would depend ...
43
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3answers
14k views

Why do most radial engines use an odd number of cylinders?

To help suppress vibration, most 'V' and 'horizontal' engines use an even number of cylinders as closely opposed as possible. Radial engines are well known for excessive vibration. For some reason ...
3
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2answers
623 views

How is vibration isolation achieved in helicopters?

In many helicopters, they say they have reduced the vibrations significantly, but how is this isolation being achieved?