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Category Archives: UDFs
Update to CHSplineA Function
I have recently corrected the CHSplineA function included in the CSpline2 spreadsheet. The earlier version was returning incorrect values for the slope and curvature of the spline (with output option 2), if the spacing of the points defining the spline … Continue reading
Beam on Elastic Foundations Analysis
A previous post on laterally loaded piles used a finite difference analysis to analyse the deflections and forces in a vertical pile subject to a lateral load at the top. An alternative approach to the same problem is presented in “Programming the Finite … Continue reading
Posted in Excel, Finite Element Analysis, Geotechnical Engineering, Newton, UDFs, VBA
Tagged Beam on elastic foundations, Excel, laterally loaded piles, UDF, VBA
6 Comments
AlgLib Spline function update
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
More on buckling columns
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 AlgLib, column buckling, Excel, Runge-Kutta, Timoshenko, UDF, VBA
1 Comment
SplineBeam update
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 continuous beam, Cubic spline, Excel, UDF, VBA
1 Comment
