Tag Archives: VBA

AlgLib Spline function update

Posted on 30/06/2010 by dougaj4

Following a question at the AlgLib Forum I have added the Hermite spline fit function to the AL-Spline-Matrix collection. The revised spreadsheet, with full open source code is available for download in 2007/20010 version and pre-2007 version. Typical output of the … Continue reading →

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , | 5 Comments

More on buckling columns

Posted on 27/06/2010 by dougaj4

Coincidentally, at about the same time as I wrote about column buckling for a column with a point load on the end, Autar Kaw at The Numerical Methods Guy was writing about buckling of columns under self weight, using the theory of … Continue reading →

Posted in AlgLib, Beam Bending, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 1 Comment

SplineBeam update

Posted on 20/06/2010 by dougaj4

Previous SplineBeam post I have modified the SplineBeam spreadsheet to allow input of a single span (simply supported or with end constraints), and to optionally allow input of the position of intermediate nodes, rather than dividing each span into equal segment lengths.  This … Continue reading →

Posted in Arrays, Beam Bending, Excel, Frame Analysis, Newton, UDFs, VBA | Tagged , , , , | 1 Comment

AlgLib Spline Functions

Posted on 07/06/2010 by dougaj4

Following earlier posts on cubic splines I have collected the Alglib interpolation routines, and the necessary supporting routines, and written interface functions to allow most of the 1Dspline routines to be called from the spreadsheet.  Since there is a large measure … Continue reading →

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

P-Y Curve function

Posted on 02/06/2010 by dougaj4

The pile lateral load analysis program presented in a previous post used linear elastic spring supports to model the restraint provided by the soil.  Soil stress/strain behaviour is of course highly non-linear, and this post presents an Excel User Defined Function … Continue reading →

Posted in Excel, Geotechnical Engineering, Newton, UDFs, VBA | Tagged , , , , , | 21 Comments