Category Archives: Newton

Numerical Integration With Tanh-Sinh Quadrature v 5.0

Posted on 29/10/2020 by dougaj4

Graeme Dennes has updated his Tanh-Sinh Quadrature spreadsheet to V 5.0. The new version (including full open source code) may be downloaded from: Tanh-Sinh Quadrature Graeme’s summary of the new features in the spreadsheet: The Tanh-Sinh quadrature workbook has been … Continue reading →

Posted in Excel, Maths, Newton, Numerical integration, UDFs, VBA | Tagged , , , , | 13 Comments

Open Source FEA Code Links

Posted on 25/10/2020 by dougaj4

There have been many posts here based on code from the book Programming The Finite Element Method, with the Fortran code either translated to VBA, or with VBA links to compiled Fortran Code. I recently discovered: The “Programming the Finite … Continue reading →

Posted in Computing - general, Excel, Finite Element Analysis, Fortran, Frame Analysis, Link to Python | Tagged , , , , | 1 Comment

A Treatise on the Mathematical Theory of Elasticity

Posted on 10/10/2020 by dougaj4

The book The Man Who Knew Infinity by Robert Kanigel describes the life of the Indian mathematician  Srinivasa Ramanujan, and also his Cambridge mentor G.H. Hardy. It mentions that Hardy was influenced by reading “A Treatise on the Mathematical Theory … Continue reading →

Posted in Beam Bending, Maths, Newton | Tagged , , , , | Leave a comment

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