rb1957:
you have hit the nail on the head. this is the key point: the the 10" tube is pretty much just reacting pressure and the structure of the sub is doing it's thing all around the this tube. the 10" housing will float in space, and all the reaction will take place along the 2" tube...
IRStuff:
since my section has arrays on either side, we cannot take advantage of the 12.75" hulls that you see in the REMUS brochure. this is the crux of the problem. please refer to the image i posted, or view it here: http://www.zhrodague.net/~rdamus/hull/ribbed-mod2-front-no-array.jpg
thanks for the numerous replies.
GBor: for a distributed load on a beam, i'm using w*L^4/(8*E*I)... and the I for the section is (pi*(a^4-b^4))/64;
where
a=outerDiameter=2"=0.0508m
b=innerDiameter=1.8"=.0457m
I=2.2485e-007m^4
(i forgot to mention, the 2"OD tube is actually a thin-walled...
GBor:
sorry for the unit mismatch; i think in SI, but the Navy, and hence the vehicle manufacturer, uses English units...
the entire weight of the payload is roughly 100kg. it is about 1.2 m in length, so 1000N/m is close enough...
indeed the only common connection between the 2" beam and...
thanks Mike and Greg. by FEA, and looking at Roark's Stress and Strain, we are operating below the collapse pressure of the vessel...
indeed i've calculated the Ixx for the 2"OD member and there is a 2 order of magnitude increase in inertia, which consequently will reduce my deflection at that...
hello all,
i'm in the process of designing a payload section for an autonomous underwater vehicle (e.g., http://www.hydroidinc.com/remus600.html).
this section will be rated to 1000psi. it is Al 7075-T6.
My problem background:
the payload section must fit inline with the vehicle diameter...
