List of AxisVM messages – Analysis 

This article does not contain all possible messages. It contains messages that can occur more or less frequently when using AxisVM.

Categories #

category_1

Question from AxisVM to the user if the selected function (e.g. “Delete”) should be carried out or about how to proceed
category_2

Information for the user

category_3

Critical note. Important information, violation of code provisions, untrustworthy results

category_4

Error. The selected function or calculation cannot be performed

category_5

Save. Dialogs to save models and results.

AxisVM MESSAGES #

LINEAR STATIC ANALYIS - At the beginning of the calculation #

unnamed (1)
Question from AxisVM to the user if the selected function (e.g. “Delete”) should be carried out or about how to proceed

Cause

The analysis was started for a model without supports

Procedure

  • “Yes” starts the analysis (note the model stability)
  • “No” cancels the analysis

Cause
In one or more loadcases, distributed loads with overlapping loads areas are defined

Procedure

  • “Yes” cancels the analysis and lists the affected loadcases and loads
  • “No” continues the analysis, overlapping loads are taken into account as they are defined

Cause
A planar system is analysed 

Procedure

  • “Yes” disregards all effects out the specified plane
  • “No” perform a spatial analysis
  • “Save model with this setting” avoids this message in future analysis

 

Cause
The nodal degrees of freedom have been changed manually or a model with saved nodal degrees of freedom has been modified. The settings do not correspond to the usual principles.

Procedure

  • Define all nodal DOF as “free” and restart the analysis
  • Automatic setting of the nodal DOF at calculation start (if required)

 

Cause
Edge hinges have been defined on free edges of domains 

Procedure

  • “Yes“ deletes the redundant hinges and starts the analysis
  • “No” cancels the analysis and selects the incorrect hinges

 

Cause
The model contains lines with the same number of connected hinges and domains

Procedure

  • “Yes” deletes the extra hinges and starts the analysis
  • “No” cancels the analysis and selects the incorrect hinges

 

Képernyőkép 2022-10-18 001029
Error. The selected function or calculation cannot be performed

Cause
The analysis was started for a model without loads. Analysis is not possible

Procedure

  • Define loads
  • Restart calculation

Cause
Static analysis is started for a model with seismic loads without results from a vibration analysis

Procedure

  • Run vibration analysis and restart static analysis

Képernyőkép 2022-10-18 001037
Save. Dialogs to save models and results.

Cause
The analysis was started, even though the results were valid. No changes were done in the model, which require a new analysis.

Procedure

  • “Yes” performs a new analysis
  • “No” cancels the operation
  • “Save as” saves the model in a new file and runs the analysis

LINEAR STATIC ANALYSIS - After the calculation #

Képernyőkép 2022-10-18 001015
Critical note. Important information, violation of code provisions, untrustworthy results

Cause

Listed nodes have no stiffness in the direction indicated (nodes can move and/or rotate without resistance)

Procedure

  • Check model

Képernyőkép 2022-10-18 001029
Error. The selected function or calculation cannot be performed

Cause

  • The model is unstable
  • Very large absolute coordinates are used

Procedure

Cause

The sum of defined loads is not equal to the sum of support reactions

Procedure

  • Control the nodal DOF (all degrees of freedom as “free”)
  • Check model

 

Cause

The available space on the hard-drive is not sufficient to write the result file

Procedure

  • Free space on the hard disk
  • Simplify model (e.g. larger mesh size)
  • Save model on a local drive (instead of a network drive)

Cause

The result file (*.axe) cannot be saved because it already exists and is set as read-only

Procedure

  • Change attributes of the result file (write protection)
  • Delete result file

NON-LINEAR STATIC ANALYIS #

unnamed (1)
Question from AxisVM to the user if the selected function (e.g. “Delete”) should be carried out or about how to proceed

Cause

  • A linear static analysis was started in a model with non-linear element properties.

Procedure

  • “Yes” continues the analysis and ignores the non-linear properties
  • “No” cancels the analysis

Képernyőkép 2022-10-18 001029
Error. The selected function or calculation cannot be performed

Cause

Large difference of a beam deformation between two increments. The analysis is interrupted, since the results are not reliable.

Procedure

  • Increase number of increments (analysis parameters)
  • Check model

Cause

Large difference in the deformation of a node between two increments. The calculation is stopped, since the results would not be reliable.

Procedure

  • Increase number of increments (analysis parameters)
  • Check model

Cause

After reaching the maximum number of iterations (analysis parameters) no convergence was reached

  • The analysis converges too slowly
  • The analysis does not converge

Procedure

  • Check the connected knowledge base article: https://axisvm.eu/docs/no-convergence-after-nonlinear-analysis/
  • Check model (stability under non-linear conditions)
  • Increase the maximum number of iterations (analysis parameters)
  • Increase number of increments (analysis parameters)

VIBRATION #

Képernyőkép 2022-10-18 001015
Critical note. Important information, violation of code provisions, untrustworthy results

Cause

  • The calculation method used, causes greater mathematical errors in the last few modes.

Procedure

  • Decrease number of modes calculated (analysis parameters)
  • Increase number of masses (e.g. generate line mesh, refine mesh size)

Képernyőkép 2022-10-18 001029
Error. The selected function or calculation cannot be performed

Cause

The model is unstable. The vibration analysis doesn’t return clear results

Procedure

  • Check model

Cause

The model does not have as many vibration modes as set for calculation

Procedure

  • Decrease number of modes calculated (analysis parameters)
  • Increase number of masses (e.g. generate line mesh, refine mesh size)

Cause

The vibration analysis does not produce any results

Procedure

  • Increase “maximum iterations” (analysis parameters)

BUCKLING #

Képernyőkép 2022-10-18 001029
Error. The selected function or calculation cannot be performed

Cause

The model does not have as many buckling shapes as set for calculation

Procedure

    • Decrease the number of buckling shapes calculated (analysis parameters)

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