Example 236: Fitting speckle displacement data

A 16 element mesh is defined and data read in which has 2 field values being the x,y displacements as determined by speckle imaging. These data are fitted by nodal displacement fields. The nodal coords are then updated by adding the fitted field values to the nodal coords (after transforming to r.c. and then transforming back to polar).


The comfile run by this example is as follows:

#Example_236 Fitting speckle displacement data.
#            A 16 element mesh is defined and data read in which has
#            2 field values being the x,y displacements as determined by
#            speckle imaging. These data are fitted by nodal 
#            displacement fields. The nodal coords are then updated by 
#            adding the fitted field values to the nodal coords (after 
#            transforming to r.c. and then transforming back to polar).

fem de coor;r;speckle;example  #cylindrical polar coords
fem de node;r;;example         #17 nodes
fem de base;r;;example         #bilinear basis
fem de elem;r;;example         #16 elements
fem de fiel;r;;example         #one field variable
fem de elem;r;;example field
fem de wind
fem dr lines
fem de data;r;;example field   #displacement data
fem dr data
fem de xi;c
fem dr data trace
fem de fit;r;;example field    #fit x,y displacements
fem fit 
fem up node add convert    #update geom polar coords
fem dr li


Files used by this example are:

Name                Modified     Size

example_236.com 10-Apr-2000 982 image_000_x.dat 10-Apr-2000 51k image_000_y.dat 10-Apr-2000 51k image_100_x.dat 10-Apr-2000 52k image_100_y.dat 10-Apr-2000 52k image_200_x.dat 10-Apr-2000 51k image_200_y.dat 10-Apr-2000 51k image_300_x.dat 10-Apr-2000 51k image_300_y.dat 10-Apr-2000 51k nodes.dat 10-Apr-2000 352 pericardium.com 10-Apr-2000 925 pericardium.ipnode 10-Apr-2000 3.1k samples_200.dat 10-Apr-2000 127k samples_200.ipdata 10-Apr-2000 124k speckle.ipbase 10-Apr-2000 1.1k speckle.ipcoor 10-Apr-2000 935 speckle.ipdata 10-Apr-2000 2.1k speckle.ipelem 10-Apr-2000 6.3k speckle.ipfiel 10-Apr-2000 2.9k speckle.ipfit 13-Apr-2007 1.8k speckle.ipnode 10-Apr-2000 4.3k

Download the entire example:

Name                      Modified     Size

examples_2_23_236.tar.gz 14-Apr-2007 113k

Html last generated: Sun Mar 6 05:50:13 2016

Input last modified: Fri Apr 13 10:31:24 2007


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