sidjones - 11-1-2006 at 09:42 PM
Hello anyone:
I noticed that I'm assigned as an oud admirer. Actually, I'm an Oud Maniac - see my bio. See my latest oud construction: How can my status be
improved? Thanks in advance.
Regards,
Sid
Jason - 11-1-2006 at 10:16 PM
It changes based on how many posts you have
Dr. Oud - 11-2-2006 at 09:02 AM
Hey Sid! It's Richard. How's it hanging? Now we can get into it about applying finite elemental analysis to boundary conditions of non-homogeneous
material like wood, huh? Nice looking oud, did you take any pics of the construction?
sidjones - 11-2-2006 at 09:46 AM
Hey Richard! Nice to hear from you again. You remember about wood's anisotropy huh? Good. Yes, I took a few Polaroids, but I seem to have stuffed
them away in a safe place. Ill search just for you. I made that oud for one of my original oud instructors - Andrew Nalbandian. I'm finishing
another, a one hole (carved into the face - no insert) instrument made with a back of Purpleheart and all Ebony appointments, even the bridge, except
the pegs are Boxwood. Come to think of it, I've never made an oud without using exotic materials. The picture you are referring to is of an oud made
out of quarter-sawn Australian Lacewood - it's jumping with spotted flames. See pix of this exotic wood which is a member of the plane (sycamore)
family: http://www.hobbithouseinc.com/personal/woodpics/lacewood.htm For those who haven't seen the oud, here it is: http://www.sidjones.com/oud.jpg
Regards,
Sid
Dr. Oud - 11-2-2006 at 10:38 AM
anistrophy? well I had to look that one up, but I was referring to the effects of analysis at the edge conditions. I had a conversation with the guys
who do analysis at my company about doing FEA on an oud and they thought that the material was too variable and the structure too delicate. They
thought there would not be enough data points for a significant result.
Wow, what a wood site! Way cool!
sidjones - 11-2-2006 at 12:07 PM
Hello Richard:
Regarding wood anisotropy see:
http://www.cplbookshop.com/contents/C2490.htm
And here is a paper that discusses numerical simulation of stringed instruments:
http://www.ensta.fr/~chaigne/articles/Stringed%20instruments/JCAS02...
As you can see here, analytical methods such as Finite Differences and Finite Elements have been producing results for several years. A U.S. patent
has been awarded for a method of analysis of sound-boards for stringed musical instruments comprising radially/circumferentially anisotropic sheets,
wherein the author uses a lute as an example:
http://www.freepatentsonline.com/4031798.html
There is a Musical Instrument Engineering program at Tufts University that uses the Finite Element Method:
http://www.tuftl.tufts.edu/mie/Pubs/MIE_at_Tufts.PDF
Perhaps your cohorts at work haven't seen this stuff yet. Perhaps they aren't oud maniacs.
Say, you have a job? Wow! I thought all the high-tech jobs vaporized a few years ago. I haven't had an interview in my field since 2002. Maybe
there is hope yet. But I kind-of shot myself in the foot, so to speak, by moving to Sacramento. Maybe I should move to Vancouver or back to Silicon
Valley.
Regards,
Sid