Tag Archives: local axes

Update to Glob_to_loc3 and Loc_to_glob3 functions

Posted on May 30, 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 December 9, 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 , , , , , , , , | 6 Comments

Converting from global to local coordinates (and vice versa)

Posted on January 8, 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 , , , , , , , | 21 Comments