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Wrong shear diagram on beam simulation

Question asked by Rodrigo De Castro Acua on Aug 26, 2015
Latest reply on Sep 2, 2015 by Stephen White

Hello everybody,

 

I'm starting to use Solidworks Simulation (2014 SP3). I'm trying to do a simple example before designing and calculating a bigger structure. The example consists on a box section beam fixed (displacements and rotations) on one side, and a local force applied on the free side.

 

Please check image1.jpg. The box section is height 1450 mm, width 730 mm. I think that thicknesses are irrelevant.

 

The length of the beam is 5 m. The force applied is 1000 N. Obviously, the reaction force on Y-axis is 1000 N and the moment reaction on Z-axis is 5000 N·m (check image2.jpg), but the shear diagram (and also moment) doesn't match with the theoretical results. It should also be 1000 N constant along the beam (please, check image3.jpg).

 

I thought it could be because of the relation between the height and the length of the beam, but I have increased the length to 30 m and the results are the same.

 

Am I missing something or doing something wrong? May anybody help me clarifying this issue?

 

Thank you in advance. Regards.

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