6 Replies Latest reply on Oct 5, 2015 3:28 PM by Shiva Joshi

    Beam analysis problem

    Shiva Joshi

      I am trying to do a simulation of an I beam (W 10x 15) under loading. There are three cases :

      1. Dead load (DL) only

      2. Live load (LL) only

      3. DL+ LL

       

      I have attached a pdf stating the problem. It has 3 point loads : 3ksi, 5 ksi, 3ksi acting at a distance shown in the pdf. Total length of beam is 19 feet.

      LL is 2k/linear feet i.e 38000 lb-f.

      On the left side the beam has hinged support and on the right is the roller support.

       

      I tried doing the simualtion but I think my results are not coming out to be correct.The shear forces should come out to be same on both ends of the beam as the beam is symmetric .

      The are coming out to be same for the DL case but not for other cases.

       

      More over for the same model my simulation is showing different result in different version of Solidworks i.e on 2013 and 2014. Don't know why. Please help.

        • Re: Beam analysis problem
          Michael Schrider

          I took a look at your model.  The left hand constraint is "fixed" versus "simply supported".  Change this and the shear values become identical.

            • Re: Beam analysis problem
              Shiva Joshi

              My model has two type of analysis- One as beam and other as solid. The left hand constraint is taken to be hinged so it can not translate just rotate.For the beam I have immovable constraint. Can you please elaborate a bit like how to give simply supported constraint for both the cases?

               

              Thanks a lot Michael

                • Re: Beam analysis problem
                  Michael Schrider

                  You actually want to fix the 3 degrees of translation on the left side and allow all rotations; fix 2 degrees of translation on the right side and allow all rotations.

                   

                  Using "Advanced Fixtures", select "Use Reference Geometry" and the face of the beam or the beam joint.  Select the face of the beam as the reference plane.  The left side should have translation selected in all three directions (leave the rotations unselected).  The right side should have translation selected in both in plane directions only (leave the normal and all rotations unselected).