Jounce & Squirm
Jounce & Squirm
(OP)
Does any one know what the specifications are or where I can get them from. (SAE, FMVSS) The # of the specs would be nice.
Thanks,
Bones
P.S. I have enclosed a link to the FMVSS 49CFR571 if any one is interrested. Free to view and Print sections from.
ht tp://www.a ccess.gpo. gov/nara/c fr/waisidx _05/49cfr5 71_05.html
Thanks,
Bones
P.S. I have enclosed a link to the FMVSS 49CFR571 if any one is interrested. Free to view and Print sections from.
ht





RE: Jounce & Squirm
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Jounce & Squirm
Reidh
RE: Jounce & Squirm
It is a test required by the FMVSS/SAE and others.
Sorry if the question was miss leading.
Bones
RE: Jounce & Squirm
When I use to do the testing it was more for fabric and cushion durability evaluation/integrity and not an FMVSS requirement, those are safety standards and what you are looking for is more for durability and cosmetic evaluation.
Most of the specifications I used came from the seating suppliers, I did look quickly through the SAE standards and found nothing related to jounce and squirm, only H-point determination and vibration performance. It was a quick look and I had over 6000+ hits on the "seat" keyword.
If my memory serves me correctly, it has been 15 years since I did this test :)
The test involved using a butt form covered in 10# duck material that is loaded into the seat approaching downward at a 45deg angle with contact at the thigh and lat bolster, loading to some predetermined load, rotating to forward position, rotating back to exit position, and unloading out at 45deg.
RE: Jounce & Squirm
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Jounce & Squirm
I would ask the seat suppliers but we are the seat suppliers.
RE: Jounce & Squirm
Maybe the one your looking for is the loading of the butt form directly into the seat cushion, rotating it ±30°, and then removing the load. I vaguely remember a test being performed according to that method, I always worked on the MASTs for NVH issues and durability.
I find it surprising as a seat supplier you don't have an internal specification to work with and build upon.
RE: Jounce & Squirm