Author Archives: dougaj4

Tanh-Sinh Quadrature V4.0

Posted on 03/01/2013 by dougaj4

Since last September Graeme Dennes has continued work on his Tanh-Sinh Quadrature spreadsheet, and has recently released Version 4.0, which can be downloaded from: Tanh-Sinh. As usual, the download includes full open-source code and extensive documentation. The new version includes routines … Continue reading →

Posted in Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , | 6 Comments

Using Excel’s shortest functions

Posted on 01/01/2013 by dougaj4

Happy New Year to everyone. I’ve been busy working on a 3D version of my frame analysis program (which will be published in the not too distant future), but as things have been a bit quiet here recently, here are … Continue reading →

Posted in Arrays, Excel | Tagged , , , , | 26 Comments

The statement below is false

Posted on 20/12/2012 by dougaj4

If you think I’m wrong, try looking at it from a different perspective. The picture above came from an optical illusion blog at: http://www.anopticalillusion.com/ and I was led there from: http://www.josleys.com/index.php which is an amazing collection of mathematical imagery by … Continue reading →

Posted in Bach, Maths, Newton, Ray Tracing | Tagged , , , , | Leave a comment

Extending Frame4 with on sheet formulas

Posted on 11/12/2012 by dougaj4

Still on Frame4, Julien asked if provision could be made for application of local loads, i.e. loads perpendicular to sloping members, rather than just horizontal or vertical.  This will actually be incorporated in the spreadsheet “real soon now”, but it … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton, VBA | Tagged , , , , | 3 Comments

Frame4 Version 3.05; with support displacements

Posted on 06/12/2012 by dougaj4

Hot on the heels of Version 3.04 comes Version 3.05. A few days ago Julien asked if the Frame4 allowed for specified support deflections, to which I replied it would be added in the future.  Searching Google on the topic I … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton, Strand7, VBA | Tagged , , , , | 7 Comments