TEMPT

Bulk Data Entry Defines parameters for mapping the grid temperature field from either an external file or an internal heat transfer subcase to either Nonlinear Static Analysis or Nonlinear Transient Analysis. The mapping is over time-domain only. The mapping is over time-domain only.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
TEMPT ID HST HSI TSTIME          
  PARAM1 VALUE1 PARAM2 VALUE2          

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
TEMPT 23 HFILE 202            
  HTINI 0.5 HTFIN 4.0          
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
TEMPT 25 HSUB 10            
  HTINI 1.0 HTFIN 5.0          
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
TEMPT 30 MHSUB   SUB          
  HSUB 3 REPEAT 5 TEND 0.5      
  HSUB 4 REPEAT 1          

Definitions

Field Contents SI Unit Example
ID Unique identification number. 2

No default (Integer > 0)

  
HST Heat source type.
HFILE
Thermal load is read from an external file.
HSUB
Thermal load is read from an internal transient heat transfer subcase.
MHSUB
The thermal load is read from multiple transient heat transfer subcases.

No default

  
HSI Heat source identification number.

For HFILE, this field provides the identification number of the external file (ID defined on ASSIGN,HFILE).

For HSUB, this field provides the identification number of the internal transient heat transfer subcase.

No default (Integer > 0)

  
TSTIME String to indicate Total/Subcase time switch.
TOT (Default)
Total time is used to look up table data for the current TLOAD1 entry.
SUB
Subcase time is used to look up table data for the current TLOAD1 entry.
  
The various PARAMi definitions are listed below, along with their corresponding allowed VALUEi ranges and default values.
HTINI The initial time in HFILE/HSUB, at which the grid temperature field is used for Nonlinear Static Analysis or Nonlinear Transient Analysis at subcase time = 0.0. If HTINI is not defined, the earliest time defined in the referenced HFILE/HSUB will be used. The time defined in HFILE/HSUB is global time.

This can be used with HST = HFILE/HSUB only.

Default = blank (Real)

  
HTFIN The final time in HFILE/HSUB, at which the grid temperature field is used for nonlinear static analysis at subcase time = TTERM (defined in NLPARM card). If HTFIN is not defined, the last time defined in the referenced HFILE/HSUB will be used. The time defined in HFILE/HSUB is global time.

This can be used with HST = HFILE/HSUB only.

Default = blank (Real)

  
HSUB Identification number of a transient heat transfer subcase. This can only be used with HST=MHSUB.

No default (Integer)

  
REPEAT Identifies the number of repeated cycles of temperature history from the specified transient heat transfer subcase, to be applied within the specified time period.

Default = 1 (Integer)

  
TEND The end time of the period that the thermal load is applied. This is applicable only for HST=MHSUB.

This can be omitted in the last line of the continuation lines. In this case, the end time of the nonlinear structure subcase is used.

TEND values should be in ascending sequence.

No default (Real)

  

Comments

  1. The TEMPT Bulk Data Entry is selected by the Subcase Information Entry TEMP(LOAD,TEMPT)=ID.
  2. TEMPT entry identification number should be unique with respect to the TEMP entry.
  3. The temperature field defined in HFILE/HSUB is a linear mapping from the time domain in between HTINI and HTFIN to the Nonlinear Static Analysis or Nonlinear Transient Analysis time domain.


    Figure 1.
  4. REPEAT can be used with HST=HFILE, HSUB, or MHSUB. When used with HST=HFILE or HSUB, the thermal loading from the HFILE or HSUB is applied N times as the value defined in the following field until the end of the nonlinear structural subcase.
  5. The temperature projection for HST=MHSUB is shown below, in which T1 and T2 are the TEND values. N1, N2, and N3 are the REPEAT values. The thermal loading from each heat subcase is compactly applied in the time domain of the nonlinear structural subcase.


    Figure 2.