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Negative Stress Results

Question asked by Sawyer Vickers on Feb 26, 2020
Latest reply on Feb 27, 2020 by Sawyer Vickers

We are attempting to perform a crane lift of a very large tank and I am getting a negative ten million stress but only when I apply cyclic symmetry. I have done smaller tanks with this exact same method without any problems but now I have problems. I have the pick-points fixed with just gravity as the forces to simulate the tank hanging in the air. The pick-points on the bottom would be connected by cables on the inside of the tank but since this is not working, I have not bothered to model yet.

 

Does anyone know how to fix this? I have attached the model

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