Stuck on complex pipe system bending moment hand calcs

AI Thread Summary
The discussion centers on calculating bending moments and potential failure areas in a complex pipe system with a long horizontal pipe (L1 at 100ft) and a vertical pipe (L2 at 30ft). The pipes are schedule 40 with a diameter of 1/2" and a moment of inertia of approximately 10^-8, with each component weighing about 2kg. Concerns include the need for structural support to prevent buckling and ensure rigidity, especially under high wind conditions, as the initial vertical section lacks additional support. The pressure in the system is low (around 40 psi), allowing for some simplifications in calculations. The user seeks guidance on assessing bending moments at fittings and overall system stability.
rylest
Messages
2
Reaction score
0
TL;DR Summary
Not sure how to tackle this indeterminate pipe problem. I'm interested in any of the failures (maybe bending moment at the fitting or buckling at the long lines).
pipeproblem.jpg


Some more details on the system are that L1 is very long (close to 100ft) and L2 is close to 30ft (the vertical pipes). The piping is all schedule 40 1/2" OD. Moment of inertia is roughly 10^-8. Components are about 2kg each. The distance of the pipes horizontally is small (around 2ft). Pressure is low and it's a gas so I think we can ignore that (40ish psi). Want to see how I can calc what the possible failure areas are. Stuff like bending moment at the fittings and buckling at the long vertical pipes. Thanks!
 

Attachments

  • 1643298394585.png
    1643298394585.png
    9.3 KB · Views: 147
Engineering news on Phys.org
Welcome!

Would you mind reviewing your description against the diagram?
If L1 is 100 feet, L2 should not be 30 feet.
It seems that you will need a structure for rigidity of those pipes in high wind conditions.
 
Of course! Seems like the 100ft line has some clamps on it higher up but at least for the initial 30ft there is no other structure. It seems to be fine? The two L1 pipes already exist I'm looking at adding the L2 pipe and tieing in.
 

Thread 'Race car suspension Class'

Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I gas it? Also read You really have two race cars. This will cover 90% of problems you have. Simply put, the car pushes going in and is loose coming out. You do not have enuff downforce on the right...
View full post »

Thread 'Carburetor cfm rating -- adding more air to intake manifold'

Carburetor CFM A Holley Carb rated at 500 cfm 2 barrel carb has venturi diameter of 1.3/8". There are 2 barrel carbs with 600 cfm and have 1.45 diameter venturi. Looking at the area the 1.378 bore has 5.9 sq. Inch area. The 1.45 dia. has 6.6 sq. inch. 5.9 - 6.6 = 0.70 sq. inch difference. Keeping the 500 cfm carb in place, if I can introduce 0.7 sq inch more area in the intake manifold, will I have the same potential horsepower as a 600 cfm carb provide? Assume I can change jetting to...
View full post »

Thread 'Cantilever help'

I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
View full post »

Similar threads

How Does ANSYS v12 Enhance Rotordynamic Analysis?
Replies
23
Views
37K
SpaceX SpaceX: Interplanetary Transport System
Replies
3
Views
3K

Hot Threads

Recent Insights

Back
Top