Deflection of beam

  • Thread starter mchei
  • Start date
  • #1
7
0

Main Question or Discussion Point

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!
 

Answers and Replies

  • #2
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,798
1,666
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
7
0
qjcbG.png


for question like above, is superposition necessary?
 
Last edited:
  • #4
SteamKing
Staff Emeritus
Science Advisor
Homework Helper
12,798
1,666
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
nvn
Science Advisor
Homework Helper
2,128
32
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.
 
  • #6
26
0
@ NVM

Couldn't you create an equivalent loading configuration to make the math easier and not have to deal with superposition at all?
 
  • #7
nvn
Science Advisor
Homework Helper
2,128
32
aeb2335: No, I currently think an "equivalent" loading is generally not equivalent.
 

Related Threads on Deflection of beam

  • Last Post
Replies
2
Views
9K
  • Last Post
Replies
4
Views
830
  • Last Post
Replies
3
Views
6K
  • Last Post
Replies
4
Views
3K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
8
Views
1K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
1
Views
939
Top