East Midlands Branch

THE
INSTITUTE OF
MATHEMATICS

AND ITS APPLICATIONS

** **

Good Vibrations

Some Counter-intuitive
Experiments in Vibration

* *

# A talk and demonstration by

Hugh
Hunt

(Cambridge University)

Wednesday 7^{th}
December, 2005

starting at 7.30
pm

Nottingham University

Maths &
Physics Building, Room
B13

[Campus map – http://www.nottingham.ac.uk/about/campuses/documents/up-map.pdf]

** **

**Abstract**

Mechanical
vibration is often taught as if it were a simple science. The mass-on-a-spring, uni-axial vibration of a rod, viscous damping, modal
analysis - all these are the bread and butter of vibration science. But real vibrating systems just don't
behave like this. There are
pitfalls in even the simplest cases and some will be demonstrated: a tuning fork; a bottle of cola; a glass
of champagne; a bending beam; a turbocharger wheel. All of these systems behave
counter-intuitively.

## The "simple" examples above have simple
explanations, and wouldn't it be great if all engineering problems were
simple? The talk will also touch on
the methods presently used to control vibration from underground railways. Some
very counter-intuitive theoretical predictions will be presented; these were
widely dismissed as rubbish until recently when measurements were made !!!

*No charge is made to attend
meetings, non-IMA members are
welcome*

The
event is coordinated by East Midlands Branch Secretary, Dr Stephen Hibberd,
School of
Mathematical
Sciences,
University of
Nottingham, email: stephen.hibberd@nottingham.ac.uk.

Details of East Midlands
Branch activities: http://www.ima.org.uk/EMidBranch/ima.html