
#1
Nov1911, 01:21 AM

P: 7

I have some questions about calculating the deflection of beam.
First, when should I applied the method of superposition ? Second, When I'm setting a "x" on the beam, where should I start and end ? Thank you for answering! 



#2
Nov1911, 10:04 AM

HW Helper
Thanks
P: 5,529

1. Whenever it is necessary.
2. Start at the beginning and go to the end. Your questions are overly vague, as are my answers. If you have a specific example to discuss, then you will get more usable responses. 



#3
Nov1911, 10:16 AM

P: 7

for question like above, is superposition necessary? 



#4
Nov1911, 06:21 PM

HW Helper
Thanks
P: 5,529

Deflection of beam
It's not necessary to use superposition. If you had a table of beam deflections and slopes for a cantilever loaded from A to B with a UDL and from A to C with a UDL, you could use superposition to find the slope and deflection for the problem shown. If you are going to work out the slope and deflection using, say, the integration method, superposition would not be as useful.




#5
Nov1911, 06:22 PM

Sci Advisor
HW Helper
P: 2,110

mchei: In response to your two questions in post 1 ...
(1) Superposition is used when a more difficult linear problem can be broken into two (or more) simpler problems.Superposition might be necessary in a question such as in post 3. 



#6
Nov2211, 10:52 PM

P: 25

@ NVM
Couldn't you create an equivalent loading configuration to make the math easier and not have to deal with superposition at all? 



#7
Nov2311, 08:57 AM

Sci Advisor
HW Helper
P: 2,110

aeb2335: No, I currently think an "equivalent" loading is generally not equivalent.



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