RE: Different results for two phase sequence approaches

Stefanos Papavasileiou — Fri, 11 Sep 2020 13:57:17 GMT

Dear Siegfried,

The activation of (self-)weight and loads in a Plastic phase, Consolidation phase and Fully coupled flow-deformation analysis is considered to be an out-of-balance force. In order to solve this out-of-balance, the calculation will use a linear relationship with the ΣM_stage multiplier to activate these new loads. This is explained in more detail in the following article: https://communities.bentley.com/products/geotech-analysis/w/plaxis-soilvision-wiki/45973/load-activation-in-time

That means that due to the different out-of-balance to be solved in each model the solution can be slightly different.

The error you encountered, according to our reference manual, mentions that there are numerical problems detected. You need to inspect the input data and the calculation results in Output to evaluate why it fails.

In general, in some cases, it helps to edit the numerical control parameters and edit the max load fraction per step to a lower value. You can check more details about these parameters and the impact on the analysis in our reference manual.

If the above does not help identify the reason for this problem, please submit a service request.

Then, one of our support engineers can help you in detail:
https://apps.bentley.com/srmanager/ProductSupport