Are you intending the thermal load to oscillate sinusoidally? It will, as all applied loading in SOL111 will be treated as a sinusoidal excitation. Also, there is a Remark in the Quick Reference Guide indicating for dynamic solutions, the use of TEMP loading will result in incorrect element forces and stresses.
Remark 10. Temperature loads cause incorrect element forces and stresses in all the dynamic analysis except SOL 400 nonlinear transient analysis with the elements having nonlinear capability.
In any event, you can combine the TEMP loading and the point load using the DLOAD Bulk Data entry- have it point to RLOAD/DAREA and RLOAD/TEMP. This should be tested to make sure it is doing what you want... I have not used this combination before.
Well actually i am trying to use a PIEZO actuator with thermal analogy and want to see the effect of it. So i am applying a u nit load at a point and want to see the effect of the piezo to the result using freq response analysis. Is this wrong ?
I am not familiar with what you are trying to do, so maybe someone else will comment. But, just make sure you understand, the thermal loading applied would be sinusoidal in nature, as that is what frequency response is doing. Also, the point load would be sinusoidal. It can be a unit load, but it will oscillate at the user-defined excitation frequencies.
