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Mechanical and structural analysis miscellaneous

Mechanics and Structural Analysis

Direction: A rigid beam is hinged at one end and supported on linear elastic springs (both having a stiffness of ‘k’) at points ‘1’ and ‘2’ and an inclined load acts at ‘2’, as shown.

  1. Which of the following options represents the deflections δ1 and δ2 at points ‘1’ and ‘2’?
    1. δ1 =
      2
      2P
      and δ2 =
      4
      2P
      5k5k
    2. δ1 =
      2
      P
      and δ2 =
      4
      P
      5k5k
    3. δ1 =
      2
      P
      and δ2 =
      4
      P
      52k52k
    4. δ1 =
      2
      2P
      and δ2 =
      4
      2P
      5k5k
Correct Option: B

Taking moment about hinge.
MH = 0
1 + kδ2.2L = p × 2L
∴ kδ1 + 2kδ2 = 2P

From the figure,
⇒ δ2 = 2 × δ1
(since the distance is l for both)

∴ δ1 =
2p
, δ2
4p
5k5k



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