Deflection of beam


by mchei
Tags: beam, deflection
mchei
mchei is offline
#1
Nov19-11, 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!
Phys.Org News Partner Engineering news on Phys.org
Researchers propose network-based evaluation tool to assess relief operations feasibility
Large streams of data warn cars, banks and oil drillers
Engineering student developing traffic forecasts
SteamKing
SteamKing is offline
#2
Nov19-11, 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.
mchei
mchei is offline
#3
Nov19-11, 10:16 AM
P: 7


for question like above, is superposition necessary?

SteamKing
SteamKing is offline
#4
Nov19-11, 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.
nvn
nvn is offline
#5
Nov19-11, 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.

(2) I usually like to start x at the beam left-hand end, and end x at the right-hand end.
Superposition might be necessary in a question such as in post 3.
aeb2335
aeb2335 is offline
#6
Nov22-11, 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?
nvn
nvn is offline
#7
Nov23-11, 08:57 AM
Sci Advisor
HW Helper
P: 2,110
aeb2335: No, I currently think an "equivalent" loading is generally not equivalent.


Register to reply

Related Discussions
Beam Deflection General Physics 1
Beam bending problem, calculate deflection of a beam Engineering, Comp Sci, & Technology Homework 7
Deflection of a beam Mechanical Engineering 5
Beam deflection in a cantilever beam Mechanical Engineering 3
I-Beam deflection Mechanical Engineering 6