Category Archives: VBA

Using Frame4Buckle with the Alglib solver

Posted on 01/03/2014 by dougaj4

The Frame4Buckle spreadsheet carries out a buckling analysis of a column or strut, which may be divided into any number of segments with varying cross section details, allowing the analysis of stepped or tapered members.  The spreadsheet includes a VBA … Continue reading →

Posted in AlgLib, Computing - general, Finite Element Analysis, Frame Analysis, Link to dll, Newton, VBA | Tagged , , , , , | 5 Comments

Rabbits, Foxes, and Lorenz Attractors

Posted on 23/02/2014 by dougaj4

Following comments here and here I have added two examples to the ODE Solver spreadsheet showing use of the ODE function to solve systems of differential equations with two or more coupled equations. The new version (including full open source … Continue reading →

Posted in AlgLib, Differential Equations, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , , , | 2 Comments

Cubic splines with horizontal data

Posted on 16/02/2014 by dougaj4

Following a request here I have modified my cubic spline functions to accept input arranged  in rows as well as columns.  By default the output arrays will have the same orientation as the range of interpolation X values, but I have also added … Continue reading →

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

Beam actions and deflections, 3D or 2D

Posted on 01/02/2014 by dougaj4

Two new functions have been added to the ConBeamU spreadsheet, last discussed here. The new version can be downloaded from ConBeamU.zip, including full open-source code. The new functions, BeamAct3D and BeamAct2D calculate forces, moments, deflections and rotations along a 3D … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton, Strand7, UDFs, VBA | Tagged , , , , , , | 2 Comments

New Links: Scientific Python and Engineering Excel

Posted on 31/01/2014 by dougaj4

The previous post had a link to Cyrille Rossant which is worth a closer look.  The blog has many detailed posts on scientific applications of Python, as well as links to Galry: a high performance interactive visualization package in Python and his … Continue reading →

Posted in Excel, Link to Python, Newton, NumPy and SciPy, VBA | Tagged , , , , | Leave a comment