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Help Files
 
Resources
ANSYS 16.0 Capabilities Chart | Download

Welcome to the CADFEM UK CAE Ltd. Help File archive. Where applicable we have given you links to download sample files as well as video demonstrations, images and animations where needed. For more information please contact us on +44 (0)844 212 5900 or email: info@cadfemuk.com

 

Repositioning Analysis Systems in Workbench

Here we have a quick ANSYS technical tip. ANSYS users can now reorganise the boxes in their Project Schematic to group together particular components when constructing their analyses. By default, ANSYS groups the boxes in a way of it's own choosing.

How You Can Define a Nonlinear Spring

In ANSYS Mechanical 15.0, you can now define a nonlinear spring. After adding a spring to your model, left-click in the Longitudinal Stiffness box and then on the small grey button that appears to the right of the box. Select Tabular from the list and then fill in the Displacement-Force table in the bottom right-hand corner of the Mechanical window.

Component Mode Synthesis (CMS) vs Substructuring

Q. What are the advantages and disadvantages of using Component Mode Synthesis (CMS) instead of Substructuring?
A. If you are performing a static analysis, regular substructuring and CMS will both give you the same answer, but regular substructuring is more efficient, since CMS always requires an eigensolution to extract the generalised coordinates. If you are performing a dynamic analysis (e.g., modal, transient, harmonic, response spectrum, etc.), then CMS is always preferred, since the use of generalised coordinates in CMS will be more accurate and easier to use than regular substructuring. In regular substructuring, Guyan reduction provides an approximation of the mass/damping matrices that is highly dependent on picking suitable internal DOFs; CMS does not require internal DOFs, since it uses generalised coordinates. Prior to 14.5, CMS did have a shortcoming in that you could not define a damping matrix. However, this has been addressed in the upcoming release, 15.0.

 

Click here to read the ANSYS Nonlinear Buckling Tutorial.

ANSYS Tutorial: Non Linear Buckling

ANSYS Workbench Tutorial: Learn how to perform Non Linear Buckling simulations with initial imperfections included. In ANSYS Workbench, we can update the geometry based on the calculated results from a previous analysis and import the finite element model of the updated and deformed geometry into a new analysis. This article shows how to do it.

Performing an Axisymmetric Analysis in ANSYS Workbench from 2D Geometry
The advantages of an Axisymmetric Analysis:

  1. A massive reduction in the number of elements, substantially reducing resources and solve time.
  2. If a highly accurate solution is required, large amounts of detail and increased numbers of elements can be added while maintaining a reasonable process time.

Demonstration of using ANSYS Workbench

This analysis highlights the importance of considering the effects of preload on the natural frequencies of a system.

Solid Elements VS Beam Elements
In ANSYS there are two methods of analysing beams:

  1. Model the beams using solid bodies and mesh them using solid elements.
  2. Model the beams using line bodies and mesh them using beam elements.

SpaceClaim and ANSYS Workbench Demonstration

This demonstration shows how to create a simple model in SpaceClaim and then export/import in to ANSYS Workbench for analysis.

 

Combining Results from Response Spectrum and Static Structural Analysis

Using ANSYS Workbench Mechanical it is possible to carry out individual response spectrum analyses for given orthogonal directions, however there is no easy method to calculate the combined effects for each of the solved spectrum analyses aside from combining the results using ANSYS APDL. One way to carry out this task within ANSYS Workbench Mechanical is to utilise user defined results or UDRs.

Preparing a model using the Analysis Geometry Processor

The Analysis Geomtry Processor (AGP) is designed to bridge the gap between CAD and analysis. This help file shows an example of how to reate simple features, slice for symmetry and meshing, imprint loading areas and more.

 

Convergence in ANSYS/DesignSpace

Sensible use of convergence controls can both increase accuracy and reduce overall runtime when compared to general remeshing. This help file gives a step by step example of setting convergence for various scenarios and compares the results without.

 

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