Creo Simulate > Reference Links > Single-Pass Adaptive Convergence Method
Single-Pass Adaptive Convergence Method
Single-pass adaptive convergence applies to static, modal, buckling, and contact analyses of all element types. Models may consist of isotropic and/or orthotropic materials. While the single-pass adaptive option is available for contact analysis, we do not normally recommend its use because it can increase run time.
Creo Simulate runs a first pass at p=3 and determines a local estimate of stress error. Using this error estimate, Creo Simulate determines a new p-order distribution and performs a final pass.
If you use the iterative solver, Creo Simulate runs a first pass using the block solver at p=2, followed by a second pass (p=3) using the iterative solver. Using the stress error estimate from pass 2, Creo Simulate performs a third and final pass.
Creo Simulate displays an RMS error estimate for stress in the summary file, so you can check the solution quality.
In general, use single-pass adaptive convergence when it is available. Larger models run with single-pass adaptive convergence typically require less disk space. Also, single-pass adaptive convergence yields comparable results to multi-pass adaptive convergence of 10% with generally shorter run times.
With single-pass adaptive analysis, you do not control the convergence tolerance, but you do need to examine the stress error estimates reported in the run summary. If these error estimates are acceptable, then continue to use single-pass adaptive convergence for efficiency.
If the error estimates from the single-pass adaptive convergence tolerance are not acceptable—for example, the stress error estimates are too large—then switch to the multi-pass adaptive convergence strategy for subsequent design studies.
For information about using the quick-check convergence method, see Strategy: Identifying and Resolving Potential Trouble Spots in a Model.
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