The attached model represents 2 beams which will be used to support a 4 wheel crane. The beams are to be placed directly onto a compacted soil foundation which I have modelled using elastic springs. For load case 1,2 and 5, the crane is lifting a load in the direction parallel to the beams which results in two wheel loads of different magnitude for each beam. For the other cases the load in perpendicular to the beams which results in two equal wheel loads for each beam (symmetrical beams).
I am getting the expected results for the perpendicular load cases, however for cases 1,2 and 5, the spring reactions are almost identical under the beams which is not expected. I would expect that the spring reactions would be greater under the side of the beam with the higher wheel loads due to the induced moment. Can you suggest a possible reason why the model is behaving this way? Is there an error with the setup perhaps?
Solved! Go to Solution.
Solved by CTuser1. Go to Solution.
If you use the beam that is less stiff ...
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Thanks Artur makes a difference but I realised the main problem was that I had fixed rotations for the soil springs which is incorrect for the setup I have. Releasing them results in the expected results.