How can I overcome the error #4800

Anees Sunesra

((((*** ERROR # 4800 ***
Grid 1 connected to element 1 has no temperature
specified in load set 2. To apply zero temperature on this grid,
SYSSETTING,undeftemp,zero needs to be added to the deck.

****************
Too many error messages. Aborting run.
Current limit is 10000. Use "MSGLMT" control card to change this value.))))


I was analysing a heatsink 3D component for a practice purpose, and as per the problem statement I created the spc constraints and temperature on their respctive faces, but once clicking on Optistruct to obtain the result, I found this error appearing in the message log.
Can anyone please help me out here to resolve this issue?

fujita

This error is due to grids without temperature. All grids have to have temperature from TEMP, TEMPD or heat transfer analysis. Please refer to the following tutorials and example. I also made a simple sample as attached.

OS-T: 1085 Linear Steady-state Heat Convection Analysis
OS-T: 1080 Coupled Linear Heat Transfer/Structure Analysis
OS-E: 0600 Steady State Thermal Analysis with Convection Loading of a Structure with Insulator

 

 

blocks_contact_heat_only.fem