Some users prefer to solve the thermal analysis first to observe how the simulation is progressing while others prefer to set up everything and run both the thermal and structural analyses at once. Either way is perfectly acceptable. To run them both at once, simply execute a solve from the static structural side and the transient thermal analysis will be run first automatically.
Procedural Steps
To initiate the solution, under Transient Thermal, highlight the Solution object, right-click and select Solve. It is safe to ignore the warning message: "The model has no temperature, convection, or radiation conditions specified...", as the DED add-on applies the appropriate boundary conditions automatically with information from the Build Settings step.