Differences between revisions 2 and 4 (spanning 2 versions)
⇤ ← Revision 2 as of 2009-08-03 03:22:35 →
Size: 727
Editor: RanaAdhikari
Comment:
← Revision 4 as of 2009-08-03 03:33:08 → ⇥
Size: 847
Editor: RanaAdhikari
Comment:
Deletions are marked like this. Additions are marked like this.
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 1. 20848 Hz
 1. 20901 Hz (third bending modes)
 1. 27553 Hz (next blow hole mode)
 1. 27887 Hz (second longitudinal mode)
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<<ImageLink(refcav-m1.png,First Longitudinal Mode,height=700)>> <<ImageLink(refcav-m1.png,First Longitudinal Mode,width=400)>>
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<<ImageLink(refcav-m2.png,First Longitudinal Mode,height=700)>> <<ImageLink(refcav-m2.png,First Torsional Mode,width=400)>>

Reference Cavity Eigenmodes

List of Eigenfrequencies

  1. 5493 Hz ( "C" shape being mode)
  2. 5537 Hz (these first two are the first bending modes - degeneracy is split by the blow hole on top)
  3. 9193 Hz (strange squeezing mode due to the blow hole)
  4. 12641 Hz
  5. 12693 Hz (second bending modes: "S" shape)
  6. 13935 Hz (first longitudinal mode)
  7. 18480 Hz (torsional mode)
  8. 20848 Hz
  9. 20901 Hz (third bending modes)
  10. 27553 Hz (next blow hole mode)
  11. 27887 Hz (second longitudinal mode)

This is picture of the first longitudinal mode. f = 13935 Hz, I guess there's a few % error on the frequency due to differences in the real density and groove dimensions. refcav-m1.png

First torsional mode (18480 Hz). refcav-m2.png

Reference_Cavity/FEA/EigenmodePlots (last edited 2012-01-03 23:02:38 by localhost)