Category Archives: Newton

Linest, NPV, IRR and solving polynomials

Posted on 01/12/2011 by dougaj4

In a comment on Using LINEST for non-linear curve fitting Lori Miller posted a formula that found the coefficients fitting a cubic polynomial curve to a set of data, then solved the resulting equation to find the X value for a given … Continue reading →

Posted in Excel, Maths, Newton, UDFs, VBA | Tagged , , , , , , | 3 Comments

Continuous Beam Analysis by Macaulay’s Method

Posted on 19/11/2011 by dougaj4

The Macaulay spreadsheet now includes a ConBeam() function, analysing continuous beams with any number of segments of different stiffness, subject to any combination of distributed or point loads and moments.  The spreadsheet also includes an example, together with output of … Continue reading →

Posted in Beam Bending, Excel, Frame Analysis, Newton, UDFs, VBA | Tagged , , , , | 8 Comments

Beam Fixed End Actions by Macaulay’s Method

Posted on 13/11/2011 by dougaj4

Following the previous post examples have been added to the Macaulay Spreadsheet illustrating the use of the method to find fixed end moments and reactions for a beam fixed at one or both ends, and subject to any number of … Continue reading →

Posted in Beam Bending, Excel, Frame Analysis, Newton, UDFs, VBA | Tagged , , , , | 2 Comments

Beam actions and deflections by Macaulay’s Method

Posted on 12/11/2011 by dougaj4

Macaulay’s Method is a convenient method of applying beam slope-deflection equations to find the shear forces, bending moments, slopes and deflections of a structural beam subject to complex load conditions, including partial varying distributed loads and point loads and moments.  It … Continue reading →

Posted in Beam Bending, Excel, Frame Analysis, Newton, Numerical integration, UDFs, VBA | Tagged , , , , | 15 Comments

IP2 Update, ByRef and ByVal

Posted on 08/11/2011 by dougaj4

A recent comment pointed out that the IPPlaneLine function (intersection of a 3D line with a plane) in the IP2 spreadsheet was giving incorrect results.  This has now been fixed, and the corrected spreadsheet can be downloaded from IP2.zip. The problem turned out … Continue reading →

Posted in Arrays, Coordinate Geometry, Excel, Newton, UDFs, VBA | Tagged , , , , , | 1 Comment