Reactions in the mechanic construction

AI Thread Summary
The discussion focuses on calculating reactions in a mechanical construction involving specific dimensions and forces. The user is struggling with the correct setup of reactions, particularly in determining the lever arm for the applied mass. A key correction noted is that the lever arm for the mass should be the sum of L1 and half of L2. The user acknowledges this mistake and expresses gratitude for the clarification. Accurate calculations of interior axis force, torque, and diagonal force are essential for resolving the issue.
Andreii
Messages
51
Reaction score
0
Hi

I am trying to figure out reactions in the mechanic construction which is here http://img.photobucket.com/albums/v309/Andreii/nalogca.jpg" .
Datas of construction are:

L1 = 7.1m
L2 = 1m
L3 = 0.2m
F = 2.8 kN = 2800N
M = 1.3 kNm = 1300Nm (this is torque)
p = 2.5 kN/m = 2500 N/m

p is showed as a mass on the mechanic construction. As is showed on the picture, on the left part is 10p and on the right is 1p.
I would like to do on the same way as i have tried and not on any other one. With fields, I mean that I am cutting the construction on three different parts (look on the second and third link at the picture). N means interior axis force, M is torque (moment) and T is diagonal force.
I checked several times my steps and I don't know why I don't get the correct result. Something is wrong in those reactions (setting them up) but not sure what. If someone could take time to check my steps please... and thank you for any information

Andreii
 
Last edited by a moderator:
Physics news on Phys.org
In your moment with respect to support A, the p lever arm is wrong. It should be L1 + L2/2.
 
Cyclovenom I checked and this was mistake. Thank you, now i will know what is correct, so i won't do the same mistake again.

Thank you
 
Back
Top