ROPS, rollover protection
ROPS, rollover protection
(OP)
I have been asked to look at a ROPS design for a concrete delivery machine. Does anyone know if (in the US) this can be done on a structural program like Multiframe or RISA, or does it require a nonlinear FEA analysis of some kind?
I think the relevant spec is SAE J1040. Maybe CSA B352-M1980. Are there others?
Thanks,
-Mike
I think the relevant spec is SAE J1040. Maybe CSA B352-M1980. Are there others?
Thanks,
-Mike





RE: ROPS, rollover protection
Your other option is to design a structure that can be analysed by hand, which, combined with linear FEA for the rest of the structure, should allow you to predict its performance reasonably well. That's a higher risk approach, obviously.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: ROPS, rollover protection
RE: ROPS, rollover protection
I am trying to get more info from the customer, also rummaging around the internet to see what I can find. I currently have Multiframe and CADRE so I'm not sure I have what it takes to do this. Things have probably changed a lot from when I did one of these in the late 80s.
Thanks again,
-Mike
RE: ROPS, rollover protection
FOPS and ROPS requirements are typically combined in the resultant cage design, depending on the industry. For instance, for forestry mobile equipment, OSHA 1910.266, the FOPS requires a solid top and mesh sides. A substantial FOPS can influence the structural design for ROPS and vice-versa. Ref. SAE J1040, J231, J397.
From Greg's comments, it is interesting to note that use of non-linear codes have progressed into regulatory/safety evaluation requirements for automotive design.
RE: ROPS, rollover protection
RE: ROPS, rollover protection
RE: ROPS, rollover protection
I was hoping to have more info by now but haven't made any progress. Just wanted to say thanks for the help.
Regards,
-Mike