Why does an ill-conditioned model give different results in ANSYS 9.0 vs. 10.0?
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This is due to the new PCG "difficulty settting," of PCGOPT,2, which is the default. Setting pcgopt,1 gives results that match 9.0 exactly. A sparse solution also matches 9.0 exactly. What is unusual about this model is the RBE3 condition, which is connected to a short beam that is fixed at the other end. This situation will be handled correctly by PCGOPT,2 at 11.0. |
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