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centrifugation en canard
Pouvoirs d'emprunter et d'hypothéquer

Glossary entry

French term or phrase:

galette

English translation:

plate

Added to glossary by Duncan Moncrieff
Nov 9, 2014 13:27
9 yrs ago
5 viewers *
French term

galette

French to English Tech/Engineering Engineering: Industrial
L'essai de vibration est réalisé en fixant le système sur une structure rigide (une galette, une équerre, un cube,…)

This relates to a shock and vibration test rig for a wide range of assemblies. A typical use is to simulate the dynamic environment arising in road haulage.

I'm envisaging a high intertia system of welded plates with a natural frequency much lower than that of the assembly to be tested. But perhaps the Glossary's "cement cakes" does apply? Any other suggestions?


TIA
Proposed translations (English)
3 +2 plate
4 slab
References
On vibration testing
Images of vibration fixtures
Change log

Nov 9, 2014 15:46: Tony M changed "Level" from "Non-PRO" to "PRO"

Nov 11, 2014 15:19: Duncan Moncrieff Created KOG entry

Votes to reclassify question as PRO/non-PRO:

PRO (3): Duncan Moncrieff, Jennifer Levey, Tony M

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Discussion

DLyons (asker) Nov 11, 2014:
And to go with your shaker table ... Do consider buying some Shaker chairs
http://www.metmuseum.org/toah/hd/shak/hd_shak.htm
DLyons (asker) Nov 9, 2014:
Thanks! Mostly the ST is dealing in a very general way with assembled structures to be tested - basically to see what it takes to shake them apart. It specifically refers to assemblies of assemblies though and says that these should be tested at the sub-assembly rather than primary assembly. So if a shrink-wrapped pallet of e.g. TV's were put on a simulated road trip the main interest would be in the damage to the individual TVs rather than whether the shrink-wrapping fell apart. So, yes, there's a valid question as to how the system is defined! The cube I think is designed to give 6-df (movement in 3D + roll/pitch/yaw). The galette may be more like a shaking table to give sinusoidal vibrations and shocks but it's only mentioned once in passing.
I'm visualizing it as a stack of steel plates which need to be massive to prevent feedback between them and what they are testing - but I have no evidence for that.
Jennifer Levey Nov 9, 2014:
More on context... Like Tony, I have some difficulty visualizing this 'galette', considering that the term comes in a phrase along with 'équerre' and 'cube'. 'équerre' comes up in many French sites* about vibration testing, and is a simple highly-rigid angle-shaped component used to fix the item under test to the vibrating table, holding it at a certain angle. A 'cube' would serve a similar purpose - but would necessarily hold the item under test at a 90º angle. When 'galette' is mentioned in the same breath as those items, methinks 'slab' might not be the best term...

*eg: http://www.sereme.com/fr/o40-�querre-en-magn�sium
Tony M Nov 9, 2014:
Context? Donal, maybe I'm being thick, but there's something I can't quite get my head round here!

Your text reads «...en fixant le système sur une structure rigide... » — but what is this 'système'? Is it in fact the equipment to be tested? Or are we in fact talking about the vibration test system, which would obviously need to be fixed onto a solid base?

I assume it must be the former, but then the idea suddenly occurred to me that it might not be...
Duncan Moncrieff Nov 9, 2014:
Slab looks reasonable, but in Robin's ref the slabs appear to be more concrete slabs, and the testing to be of concrete slabs and beams. I think in your case (though it's only a hypothesis) the testing is more likely to be of vehicles, or parts of them. If so, I get the impression from the refs I posted that the attaching structure is more likely to be some kind of alloy (that is going to be chosen in function of the materials being tested). So maybe plate is better.

Proposed translations

+2
1 hr
Selected

plate

Slab can work, but so could plate (based upon the idea that the "galette" is more likely to be metallic and maybe round). It's also going to depend upon the thickness of the thing: the thicker it is, the more apt "slab" becomes; the thinner it is, the more "plate"-like it becomes.

E.g. for images of "galettes metalliques":
http://omnilogie.fr/O/Droit_Obut_:_la_boule_de_pétanque
http://www.cnrs.fr/supra2011/spip.php?article1
http://largehadroncollider-tpe2013.blogspot.fr/p/blog-page_1...
http://www.ecosources.info/innovations/394-galette-de-stocka...

Metal slab:
http://cdn.steelonthenet.com/tools/pictures/steel-slab.jpg
http://www.shutterstock.com/fr/video/clip-2858908-stock-foot...
http://www.chow.com/reviews/33-baking-steel-modernist-cuisin...
http://www.frantznewsletter.com/2010/04/30/tips-techniques-h...
Peer comment(s):
agree B D Finch
4 hrs
Thanks B D
agree kashew
20 hrs
Thanks kashew
Something went wrong...
4 KudoZ points awarded for this answer. Comment: "Thanks Duncan - that was very helpful."
27 mins

slab

Existing beam and slab test methods have problems with variability or their application in structural design.
-->
Les méthodes existantes d'essai de faisceau et de galette ont des problèmes avec la variabilité ou leur application dans la conception structurale.

https://dspace.lboro.ac.uk/dspace-jspui/bitstream/2134/3900/...
Note from asker:
That looks good thanks Robin. (I actually meant to make this PRO).
Peer comment(s):
neutral B D Finch : Unlike slabs, galettes tend to be round.
5 hrs
Something went wrong...

Reference comments

50 mins
Reference:

On vibration testing

You might find these useful:

http://proxy.siteo.com.s3.amazonaws.com/www.aste.asso.fr/fil... (mentions "galettes" and vibration tests, similar, but not identical, sentence structure to your text)

http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/43015/1/12...
https://standards.nasa.gov/documents/detail/3314878 (get the pdf NASA-HDBK-7004)
Both are interesting docs on vibration testing (you might have the time to appreciate them at the moment).
Note from asker:
Thanks Duncan - I'll get those.
Something went wrong...
19 hrs
Reference:

Images of vibration fixtures

http://www.baughneng.com/headplates.php


--------------------------------------------------
Note added at 19 hrs (2014-11-10 09:16:50 GMT)
--------------------------------------------------

Actually, I looked at various articles on vibration testing and I saw their common denominator was fixture. So I looked for fixture in the context of vibration testing and found that site.

Here is some more didactic information, for instance

http://www.ttiedu.com/157-5cat.html
Note from asker:
Thanks Anca. I tried Google Images but didn't find anything as helpful as that.
Peer comments on this reference comment:
agree Duncan Moncrieff
3 hrs
Thanks, Duncan.
Something went wrong...
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