DATA SET 7: NODAL COORDINATES

Formats for one-, two-, and three-dimensional problems are slightly different. However, the nodal coordinates can all be automatically generated if the coordinates appear in regular patterns. This data set is not needed if Logical Unit 11 is used as input (i.e., if KVI > 0 in Data Set 2).

One-Dimensional Problems:

Typically, a total of NNP lines are required.

Line 1 to Line NNP:

The coordinates should be in ascending or descending order. Each line is in free-field format containing:

  1. NI = Node number of the first node in the sequence.
  2. NSEQ = NSEQ subsequent nodes to be automatically generated.
  3. NAD = Increment of the node number for each of the NSEQ subsequent nodes.
  4. XNI = x-coordinate of node NI (L).
  5. XAD = Increment of the x-coordinate for each of the NSEQ subsequent nodes (L).
  6. XRD = Percent increase of the increment over its preceding increment (decimal fraction):

0 = All increments, XAD's, are the same.

> 0 = The first increment is XAD*(1+XRD), the second increment is XAD*(1+XRD)**2, the third increment is XAD*(1+XRD)**3, and so on.

NOTE: A line containing six zeros separated by spaces or commas must be used to signal the end of the x-coordinate data.

Two-Dimensional Problems:

Typically, a total of 2*NNP lines are required: NNP lines each for the x- and z-coordinates.

Line 1 to Line NNP: Each line is in free-field format containing:

  1. NI = Node number of the first node in the sequence.
  2. NSEQ = NSEQ subsequent nodes to be automatically generated.
  3. NAD = Increment of the node number for each of the NSEQ subsequent nodes.
  4. XNI = x-coordinate of node NI (L).
  5. XAD = Increment of the x-coordinate for each of the NSEQ subsequent nodes (L).
  6. XRD = Percent increase of the increment over its preceding increment (decimal fraction):

0 = All increments, XAD's, are the same.

> 0 = The first increment is XAD*(1+XRD), the second increment is XAD*(1+XRD)**2, the third increment is XAD*(1+XRD)**3, and so on.

NOTE: A line containing six zeros separated by spaces or commas must be used to signal the end of the x-coordinate data.

Line (NNP+1) to Line 2*NNP: contain the same information as described above but for the z-coordinate.

Three-Dimensional Problems:

Usually a total of NNP lines are required. Each line contains the following variables and is in free-format.

  1. NI = Node number of the first node in the sequence.
  2. NSEQ = NSEQ subsequent nodes will be automatically generated.
  3. NAD = Increment of node number for each of the NSEQ subsequent nodes.
  4. XNI = x-coordinate of node NI, (L).
  5. YNI = y-coordinate of node NI, (L).
  6. ZNI = z-coordinate of node NI, (L).
  7. XAD = Increment of x-coordinate for each of the NSEQ subsequent nodes, (L).
  8. YAD = Increment of y-coordinate for each of the NSEQ subsequent nodes, (L).
  9. ZAD = Increment of z-coordinate for each of the NSEQ subsequent nodes, (L).

NOTE: A record with 9 0's must be used to signal the end of this data set.

v1.0 - 1/13/1999

Jin-Ping Gwo, email: jgwo@umbc.edu