Category Archives: Excel

Using Excel with Python and ctypes

Posted on 05/10/2020 by dougaj4

The Strand7 API provides an interface between the Strand7 Finite Element Analysis program and external software. It works with many different languages, including Python, which uses ctypes to transfer data to and from the API functions. It is essential that … Continue reading →

Posted in Beam Bending, Excel, Link to dll, Link to Python, NumPy and SciPy, PyXLL, Strand7, UDFs | Tagged , , , , , | Leave a comment

Spherical Geometry and Vincenty’s Formulae

Posted on 27/09/2020 by dougaj4

Wikipedia has detailed articles on: Spherical Geometry  and Vincenty’s Formulae (for geometric calculations on an ellipsoid). The spreadsheet Vincenty.zip uses those resources to perform the following calculations, using both on-sheet calculations and VBA user-defined functions (UDF’s): Calculation of distance and … Continue reading →

Posted in Computing - general, Coordinate Geometry, Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 9 Comments

Import Data from a Picture to Excel

Posted on 16/09/2020 by dougaj4

The myOnlineTraininghub blog recently had a post entitled Import Data from a Picture to Excel which sounded promising, since I often need to extract data from Autocad files saved to a pdf. From the link, it seems that if I … Continue reading →

Posted in Computing - general, Excel | Tagged , , , | 1 Comment

Concrete Stress Blocks

Posted on 15/08/2020 by dougaj4

Back in 2010 and 2011 posts here looked at a comparison of alternative stress blocks in the then new AS 3600, and a procedure for calculating parameters for a rectangular stress block exactly equivalent to the Eurocode 2 parabolic-rectangular stress … Continue reading →

Posted in Beam Bending, Concrete, Excel, Newton | Tagged , , , , , , , , , | 1 Comment

Deflections and Moments in Rectangular Plates

Posted on 09/08/2020 by dougaj4

Following a question here I have compared tabulated coefficients for deflections and bending moments in a rectangular plate with results of a Strand7 analysis using 8 noded plate/shell elements.  The results are summarised below, and in a spreadsheet which also … Continue reading →

Posted in Beam Bending, Curve fitting, Excel, Finite Element Analysis, Newton | Tagged , , , , , , , , , , | 7 Comments