Category Archives: Finite Element Analysis

Converting from global to local coordinates (and vice versa)

Posted on 08/01/2014 by dougaj4

In 3D structural analysis (as well as many other applications) it is necessary to convert section properties, forces, and deflections between coordinate systems defined by individual structural members (local coordinates) and the common coordinate system defining the entire structure (global … Continue reading →

Posted in Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, UDFs, VBA | Tagged , , , , , , , | 22 Comments

Python for VBA users- 7; Making Python go Faster

Posted on 20/12/2013 by dougaj4

As reported in the previous post in this series, although the compiled routines included in packages such as Numpy, Scipy, and Pysparse are very fast, other parts of the code turned out to be slower than the equivalent in VBA.  … Continue reading →

Posted in Arrays, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Newton, NumPy and SciPy, UDFs, VBA | Tagged , , , , , | Leave a comment

Two viewers

Posted on 17/12/2013 by dougaj4

I have previously looked at using Excel for generation of images from data listing  3D coordinates of points and lists of connections (see  https://newtonexcelbach.wordpress.com/2012/09/27/daily-download-11-perspective-projection/ for instance), but this approach is limited in what can be done: It will only generate a “wire-frame” … Continue reading →

Posted in Animation, Computing - general, Finite Element Analysis, Newton | Tagged , , | Leave a comment

Python for VBA users- 6; Using Pysparse with Excel

Posted on 29/10/2013 by dougaj4

Previous Python Post The analysis of structural frames requires the solution of large sparse matrix systems, which rapidly becomes very time consuming using a VBA based solver, especially for 3D analysis.  I have previously presented versions of my frame analysis … Continue reading →

Posted in Arrays, Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, Newton, NumPy and SciPy, VBA | Tagged , , , , , | 1 Comment

3DFrame Ver 1.03 and Frame4 Ver 3.07

Posted on 17/03/2013 by dougaj4

Updated versions of my 2D and 3D frame analysis spreadsheets are now available for download from: 3DFrame.zip Frame4.zip The download files include full open-source VBA code, and dll files for compiled solvers for much better performance with large models. See https://newtonexcelbach.wordpress.com/2012/11/16/frame4-now-with-added-alglib/ for … Continue reading →

Posted in Excel, Finite Element Analysis, Frame Analysis, Link to dll, Newton, VBA | Tagged , , , | 34 Comments