Hi, I have to do a structural and thermal analysis on a blade and a disk (in particular of the rotor) of a gas turbine.I created a cylindrical system and then I imposed the cyclic symmetry with the constraints. To simulate the centrifugal force I used RFORCE Card while to simulate the pressure I used PLOAD4. Between the disk and the blade there is a contact surface (blade and disk are able to slide). If I run this non-linear analysis I obtain good results. However when I add also the thermal analysis something goes wrong:
-I created a convection surface for the blade
-I imposed a known temperature for some points and for the environment
-I used MAT4 and MATT4 in order to have some material properties dependent from temperature using TABLEM1 (linear dependency)
-I used card PCONTHT for the contact surface to assure conduction between the disk and the blade
The solver starts but at the third iterations (no matter which NLPARM's parameters I use) it stops because the error goes over the machine's precision.
I have some doubt about it:
-How can I link the collector of thermal and structural analysis in order to apply the results of thermal analysis to the structural one?
-Which Loadstep do I have to use for thermal analysis using PCONTHT?
-Could it be that I have to change something in the creation of the contact (ADJUST, MORIENT etc..)?
