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Delwin D Fandrich wrote:
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<br>Does this item have a specific / proper name?</blockquote>
<div dir="ltr"><font color="#000080">If there is, I don't know it. I've
always heard it referred to as "the bell."</font></div>
<br>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px">I'm
not sure I understand your point about damping here. I thought you were
of the opinion that the problem with internal damping was that it absorbed
to much energy, tho here you are concerned about the plate actually vibrating
to much, and the purpose of the device itself supports you.</blockquote>
<div dir="ltr"><font color="#000080">Only in a perfect world are vibrating
string terminations unaffected by vibrating strings. In our world things
aren't so clean.</font></div>
<p dir="ltr"><font color="#000080">The whole meaning of 'high internal
damping' means that vibrating energy transferred into the material in question--from
whatever driving source--is readily absorbed and converted into heat.</font></blockquote>
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<div dir="ltr">Ok... but it also means that the material doesnt vibrate
readily.... or what ?</div>
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<div dir="ltr"><font color="#000080">Gray iron is massive (but not perfectly
massive) and it is moderately stiff (not perfectly stiff). The bell/bolt
arrangement effectively adds both mass and stiffness to the hitchpin panel,
reducing the amount of energy this panel easily accepts from the strings,
hence keeping more energy in the strings to be used to move the bridge.</font></div>
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<div dir="ltr">I get your point now, I think anyways.... You are saying
that because of the lack of stiffness in this area of the plate the thing
accepts vibration energy and converts it into heat. So if the plate is
stiff enough... or massive enough (kind of the same thing in different
way) it wont accept any (or much) vibration energy in the first place to
get converted.</div>
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<p dir="ltr">I think I feel a little head ache comming on tho concerning
the seperating between internal damping, and exterior vibration. :)
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<div dir="ltr"><font color="#000080">Del</font></div>
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<p><br>Thankyou kindly Del.
<p>RicB
<p>--
<br>Richard Brekne
<br>RPT, N.P.T.F.
<br>UiB, Bergen, Norway
<br><A HREF="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A>
<br><A HREF="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broadpark.no/~rbrekne/ricmain.html</A>
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