Tag Archives: local axes

3DFrame-py update

Posted on 03/09/2023 by dougaj4

The Python 3DFrame spreadsheet has been updated to allow for analysis including torsional warping effects. The new spreadsheet and associated Python files can be downloaded from: 3DFrame-py.zip The download file includes four sample spreadsheets comparing analysis results with output from … Continue reading →

Posted in Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Newton, PyXLL, Strand7 | Tagged , , , , , , , | 1 Comment

Mastan2

Posted on 26/08/2023 by dougaj4

Mastan2 is a free frame analysis program based on Matlab. The linked site provides alternative downloads for those with or without Matlab installed. The site also provides a link to the book Matrix Structural Analysis, 2nd Edition, by McGuire, Gallagher, … Continue reading →

Posted in Beam Bending, Concrete, Excel, Finite Element Analysis, Frame Analysis, Link to Python, Newton, PyXLL, Strand7 | Tagged , , , , , , , | 1 Comment

Update to Glob_to_loc3 and Loc_to_glob3 functions

Posted on 30/05/2017 by dougaj4

Following a comment here I have updated the Glob_to_loc3 and Loc_to_glob3 functions to deal with some problems when the local longitudinal axis is parallel to the global Y or Z axes.  The IP2 spreadsheet, including the revised functions, can be downloaded from: … Continue reading →

Posted in Coordinate Geometry, Excel, Finite Element Analysis, Frame Analysis, Newton, UDFs, VBA | Tagged , , , , , , | 6 Comments

3D Frames, axes and stiffness matrices

Posted on 09/12/2016 by dougaj4

In the course of adding provision for spring end releases to the 3DFrame spreadsheet, I have also tidied up the code for generating the structure stiffness matrix, and added some documentation to the spreadsheet.  The revised spreadsheet (version 2.02) can … Continue reading →

Posted in Arrays, Beam Bending, Excel, Finite Element Analysis, Frame Analysis, Newton, Strand7, UDFs, VBA | Tagged , , , , , , , , | 10 Comments

Converting from global to local coordinates (and vice versa)

Posted on 08/01/2014 by dougaj4

In 3D structural analysis (as well as many other applications) it is necessary to convert section properties, forces, and deflections between coordinate systems defined by individual structural members (local coordinates) and the common coordinate system defining the entire structure (global … Continue reading →

Posted in Excel, Finite Element Analysis, Frame Analysis, Link to Python, Maths, UDFs, VBA | Tagged , , , , , , , | 22 Comments