4 points seat belts forces
4 points seat belts forces
(OP)
Hi all,
in the project I am working on, I have analyze a sort of crew rest area. In one configuration of this monument, the crew will be sit and secured with 4 points seat belts.
My question is:
Is there the possibility to get the loads on the attachment points in all 6 loadcases (FWD,AFT,LH,RH,UP,DOWN) without running a transient analysis with dummy bodied like in LS-DYNA?
I hope you can help me.
in the project I am working on, I have analyze a sort of crew rest area. In one configuration of this monument, the crew will be sit and secured with 4 points seat belts.
My question is:
Is there the possibility to get the loads on the attachment points in all 6 loadcases (FWD,AFT,LH,RH,UP,DOWN) without running a transient analysis with dummy bodied like in LS-DYNA?
I hope you can help me.
Talk To Other Members
RE: 4 points seat belts forces
I take it you are not dealing with an existing "dynamic seat" (TSO C-127) otherwise you wouldn't be talking about attaching restraints to a separate monument.
Would this be a "flight attendant" seat, or something similar, in which case the same requirements may apply?
Look up GAMA-13 and the TSO C-127 for starters. The referenced data in those will keep you going for a long time.
RE: 4 points seat belts forces
Plus AC21-34 page 31 gives the shoulder harness mass / total mass split is 40%.
RE: 4 points seat belts forces
A few basic questions/points for clarity.
Are the seat belts to be attached: (a) 100% to seat; (b) 100% to aircraft structure [IE: floor, wall and/or ceiling]; (c) 50-50% seat and acft structure???
Is the seat geometry/position fixed in-space [one-size-for-all?]... or adjustable to various degrees [adjusts to individual occupant?]. Adjustable seats add complexity to the design.
Is the seat intended for occupancy during take-off-and-landing... or only for use in-flight during specified periods? Crashworthy seating is far more complex than non-crashworthy [crew-rest-only] seating [design/analysis/testing].
May find following documents useful...
SAE AS8043 Restraint Systems for Civil Aircraft
SAE ARP4101/1 Seats and Restraint Systems for the Flight Deck
Regards, Wil Taylor
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