Learning Forum

[chinels]

I am very new in Ansys and I need to use it for my School project work.

I am working on the prediction of inner wall temperature of pipe during in-service welding using Mechanical APDL 2D Steady State thermal analysis.

My problem is this, my welding heat energy input is in Joules/Millimeter (J/mm). So, How do I input my welding heat energy in Joules/mm in Ansys APDL. I can only apply load in Degree Celsius temperature but the load need to be in J/mm.

Please, experts in the house help me out, am just new in Ansys. How do I input WELDING HEAT ENERGY IN J/mm IN A 2D STEADY STATE THERMAL ANALYSIS IN ANSYS APDL?

Thanks

[Vigneswaran Sridharan]

Hi,
I can suggest few reference documents to perform steady-state thermal analysis. These should be helpful for someone new to MAPDL.
APDL scripting:
2.5. Applying Loads and Obtaining the Solution (ansys.com)
GUI method:
2.8. Performing a Steady-State Thermal Analysis (GUI Method) (ansys.com)
Also, I need to add something about the '/UNITS,' command.
It allows the user to set a marker in the database indicating the system of units used. The setting may be reviewed with the/STATUScommand at the Begin level. The units label and conversion factors on this command are for user convenience only and have no effect on the analysis or the data. That is,/UNITSwill notconvert database items from one system to another (for example, from U. S. Customary to SI, etc.). The units setting will be written to the file of IGES data [IGESOUTorCDWRITE], which can then be read by many programs that read IGES files. The user must still use consistent units for the results to be valid.
Vigneswaran

[dlooman]

If the weld body is modeled you can apply a heat generation rate in which you divide heat load in J/mm by the cross-sectional area of the weld. Heat generation is applied with the BFE command: BFE,,HGEN,,Value.

[chinels]

Thanks All for the responses, as I can see there is no direct input of Welding Heat input in J/mm. Your advices are well acknowledged. I will follow-up with all advice and come around with solution.
Once again thanks to All.