Subsections

• Beam Loads Data Records
• Combined Load Definition Data Records
• Scan Load Definition Data Records

Loading Data Records

 

Beam Loads Data Records

  A Beam Loading Data Set is denoted by a `KEY' of 28 in the data set header record. For each beam element for which loading information exists there is a header record as follows:

IKEY, NUMB, ITYPE, NPNTLD, NTRPLD, NPNTBM, NTRPBM

To be written in the format:

FORMAT (1X, I2, 6I5)

or: FORMAT (1X, I2, I10, 5I5) for 10 digit element number format

Where:

IKEY = -1 for loading data

= -3 for data set delimiter

NUMB = element number

ITYPE = element type (optional)

NPNTLD = number of point loads

NTRTLD = number of distributed loads

NPNTBM = number of point bending moments

NTRPBM = number of distributed bending momemts

Then for each point load:

IKEY, NPNT, X, Y, Z, FX, FY, FZ

To be written in the format:

FORMAT (1X, I2, I5, 6E12.5)

Where:

IKEY = -2

NPNT = reference number

X,Y,Z = global coordinates of point of application

FX,FY,FZ = global components of applied force

Then for each distributed load, a pair of records:

IKEY, NP1, X1, Y1, Z1, FX1, FY1, FZ1
IKEY, NP2, X2, Y2, Z2, FX2, FY2, FZ2

To be written in the format:

FORMAT (1X, I2, I5, 6E12.5)

Followed by bending moments input in a similar way. Note that if the bending moments and shear forces in the corresponding element-wise data set are input in a local, rather than global system, then the loads in data set 28 must also be input in the local system.

Combined Load Definition Data Records

  A Combined Load Definition Data Set is denoted by a `KEY' of 29 in the data set header record. This data set enables combination loadcases to be defined as input data rather than using the FEMVIEW command RESULTS CALCULATE COMBINE at run time. Using this method of defining combined loadcases, the combined loadcase name is specified in the RESULTS CALCULATE COMBINE command. The source loadcases and weightings are automatically referenced, and the user may then select one of the attributes for the combined loadcase.

When combining loadcases, each of the loadcases must contain the same attributes with identical component definitions.

The combined loadcase is allocated a new loadcase name in the data set header record. The loadcases, with appropriate weighting factors, that are to be used to create the combined loadcase are then defined as follows:

IKEY, Loadcase, NUMSTP, FACTOR

To be written in the format:

FORMAT (1X, I2, 1X, 6A1, I5, E12.5)

Where:

IKEY = -1 for combination data

= -3 for data set delimiter

Loadcase = source loadcase name

NUMSTP = step number for source loadcase

FACTOR = Factor to be applied to this source loadcase

Scan Load Definition Data Records

  A Scan Load Definition Data Set is denoted by a `KEY' of 31 in the data set header record. This data set enables scan loadcases to be defined as input data rather than using the FEMVIEW command RESULTS CALCULATE SCAN LOADCASE at run time. Using this method of defining scan loadcases, when the scan loadcase name is specified in the RESULTS CALCULATE SCAN LOADCASE command, the scan criterion and source loadcases to be scanned are automatically referenced, and the user may then select the required attribute(s) to be scanned.

When scanning loadcases, each of the loadcases must contain the same attributes with identical component definitions, and attributes with more than ten components, or with complex or enumerative components, cannot be scanned.

The scan loadcase is allocated a new loadcase name in the data set header record. Then the criterion for the scan is defined as follows:

IKEY, ICRIT

To be written in the format:

FORMAT (1X, I2, I5)

Where:

IKEY = -1 for scan criterion

ICRIT = 1 for scan of maximum values

= 2 for scan of minimum values

= 3 for scan of absolute maximum values

= 4 for scan of absolute minimum values

Then the loadcases that are to be scanned to create the scan loadcase are defined as follows:

IKEY, Loadcase, NUMSTP

To be written in the format:

FORMAT (1X, I2, 1X, 6A1, I5)

Where:

IKEY = -2 for scan data

= -3 for data set delimiter

Loadcase = source loadcase name

NUMSTP = step number for source loadcase