is VSR ?
is a mechanical process for stabilising engineering components. This is
done by inducing the component into a series of resonant conditions.
These are found by rigidly attaching a variable force/frequency exciter
to the component, isolating the assembly via rubber mounts, then
scanning through the frequency range until these resonant conditions are
identified. They are then treated for the relevant number of cycles. The
exciter used being one or several from the range, dependant on the
frequency response, geometry etc. The loading patterns induced by the
resonant vibrations are far more complex than could be achieved by
externally applied static force therefore causing the component to
undergo overall elastic and plastic deformation resulting in both a
lowering and a redistribution of the overall stress field.
size of component and range of materials can be treated?
can treat components weighing from a few grammes to over 200 tonne in a
wide range of ferrous and non ferrous materials, in cast fabricated and
bar form. Mixed metal components can also be succesfully treated as can
materials in previously treated conditions. The limitations being
severly cold worked materials and because VSR brings about no
metallurgical change it is unsuitable for the majority of pressure
vessel and pipework applications.