recorder Drift

cctvcctv · Post by **cctvcctv** » Mon Jun 06, 2005 11:16 am

recorder Drift -file $fileName <-time> -iNode ($inode1 $inode2 ...) -jNode ($jnode1 $jnode2 ...) -dof ($dof1 $dof2 ...) -perpDirn ($perpDirn1 $perpDirn2 ...)

what is the relation between the -i nodes and -j nodes?

belong to the same element?

thanks!!!

silvia · Post by **silvia** » Mon Jun 06, 2005 11:37 am

don't have to. the drift will be the difference between the displacement of node j and i, divided by the distance.

berktaftali · Post by **berktaftali** » Mon Jun 06, 2005 11:39 am

i-node and j-node are the nodes you want to calculate the drift between. The recorder will
1. get the displacement of node i in direction of $dof1, d1
2. get the displacement of node j in direction of $dof1, d2
3. find the difference, diff = d1-d2
4. calculate the distance between the two nodes in direction of $perpDirn1, L
5. calculate the drift angle, diff/L, and store it in the $fileName