Checking analysis quality

Check Analysis Quality on the Analysis Job Monitor provides a rough estimate of the quality of your model based on the average element error, which is derived from the stress error norm and strain energy error norm. The element error calculation is a variation of the relative percentage element error derived from the Zienkiewicz-Zhu error estimate (1987).

Note:

Element error calculations require strain results. In order to calculate analysis quality, be sure to include a strain output request in your solution.

The reported confidence level is the inverse of the average element error. For example, if the average element error is 10%, the confidence level is 90%.

The lower the confidence level reported, the higher the average element error and the greater the likelihood that your model may contain artificial stress concentrations. For linear statics analysis, models with a confidence level below 95% may benefit from further mesh refinement.

Reference

Zienkiewicz, O.C and Zhu, J.Z., A Simple Error Estimator and Adaptive Procedure for Practical Engineering Analysis, International Journal for Numerical Methods in Engineering, Vol 24, 1987, pp 337-357.

Limitations

Confidence levels can only be calculated for 2D triangular and quadrilateral elements, and 3D tetrahedral elements.

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Checking analysis quality, Simcenter 3D 2021.1 Series

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