Seat Track - Boundary Conditions
Seat Track - Boundary Conditions
(OP)
I am designing some components, which are connected to the seat track introducing high amount of moment into it. What constraint conditions do you usually apply to simulate seat track connections? Are the translational directions enough or should I also include rotations (it is not too conservative?)
Thanks for answers.
Thanks for answers.





RE: Seat Track - Boundary Conditions
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RE: Seat Track - Boundary Conditions
if the moment is real then you have to design for it ... maybe you need to reinforce the seat track to help it distribute the load the the fuselage frames supporting the seat track. if the loads are so different to what the OEM would have considered, maybe you should chase the loads into the fuselage shell ?
RE: Seat Track - Boundary Conditions
RE: Seat Track - Boundary Conditions
1) you completely ignore the moment (and release it in your model), so what you're modelling is the situation after the bolt has yielded [a simple approach, but unconservative; but if you've got a large MS ...], or
2) apply both moment and axial loads to the bolt, assume the moment is equal to the limit moment strength of the bolt and this'll reduce the axial load you can apply; i'd combine as Rl + Rm = 1 (or Rl^2+Rm^2 = 1) Rl = applied axial load/ult allowable, Rm = applied moment (= limit)/ult allowable moment. to model this i'd model both full fixity and simply supported and combine the results (if yield moment is 70% of the moment generated in the fully fixed model, then the combined internal loads are 70%*fixity + 30%*SS)
clear as mud ?
RE: Seat Track - Boundary Conditions
RE: Seat Track - Boundary Conditions
RE: Seat Track - Boundary Conditions
RE: Seat Track - Boundary Conditions