HFSS15: Process Flow for HFSS Workbench for Stress Feedback

To setup the coupling, drag the "Solution" cell of the HFSS system and drop it at the "Setup" cell of a Thermal and Stress system. You also need to also couple the Thermal and Stress system to capture the effect of thermal force. The image below illustrates a coupling setup where both the Thermal and Stress system are ready to be "Updated". The HFSS adaptive solution has converged in 3 passes. The HFSS system has both thermal and stress feedback enabled.

1. Right click on the Solution cell of Stress and select "Update"

a. The Setup of Thermal will be "Updated" with em loss from HFSS

b. The Solution of Thermal will be "Updated" and temperature will be exported to HFSS

c. The Setup of Stress will be "Updated" with thermal force from Thermal and force density (just zeros) from HFSS

d. Displacement will be exported to HFSS after Stress finishes simulation

2. Right click on the Solution cell of HFSS and select "Enable Update"

The Solution cell icon changes from a green checkmark to the Update lighting icon.

3. Right click on the Solution cell of HFSS and select "Update"

a. HFSS re-simulate the 3rd pass with its mesh and the temperature/displacement feedback

b. The profile will show information about the feedback

c. Both "Revert" menus will be available at the right mouse click menu of the solve setup item.

Manual Iteration After First Iteration Completes

The image below illustrates the WB schematic after the previous situation, after the 1st iteration has completed. Notice the changed icons for the status for Setup for Thermal and Structural.

1. Right click on the Solution cell of Stress and select "Update"

a. The Setup of Thermal will be "Refreshed" and "Updated" with EM loss from HFSS

b. The Solution of Thermal will be "Updated" and temperature will be exported to HFSS

c. The Setup of Stress will be "Refreshed" and "Updated" with thermal force from Thermal and force density from HFSS

d. Displacement will be exported to HFSS after Stress finishes simulation

2. Right click on the Solution cell of HFSS and select "Enable Update"

3. Right click on the Solution cell of HFSS and select "Update"

a. HFSS re-simulates the 3rd pass with its mesh and NEW temperature/displacement feedback

b. The profile will show information about the feedback

Note that the delta temperature and displacement is being reported in the profile

Revert the HFSS Solution For Temperature and Displacement

You can revert the temperature and displacement in HFSS solution separately.

1. Select "Revert to Initial Temperature" in HFSS.

A warning message notifies you about the invalidation of solution

2. Right click on HFSS solve setup and select "Analyze"

HFSS re-simulates the 3rd pass with its mesh and displacement that was previously exported from Mechanical, but without temperature.

3. Select "Revert to Zero Displacement" in HFSS, and followed by "Analyze"

HFSS re-simulates the 3rd pass with its mesh without neither temperature nor displacement

Only Stress Feedback

The coupling setup is the same as in Use Case 1, with either one of the following differences

• The HFSS system is not enabled for thermal feedback. Since HFSS is not enabled to support feedback, the "Export Result" properties will be missing in the thermal system's property window.

• The HFSS system is enabled for thermal feedback, but users select not to "Export Result" in the thermal system. This is to disable the "automatic" feedback after Mechanical finishes its simulation.

1. Right click on the Solution cell of Stress and select "Update"

a. The Setup of Thermal will be "Updated" with em loss from HFSS

b. The Solution of Thermal will be "Updated"

c. The Setup of Stress will be "Updated" with thermal force from Thermal and force density from HFSS

d. Displacement will be exported to HFSS after Stress finishes simulation

2. Right click on the Solution cell of HFSS and select "Enable Update"

3. Right click on the Solution cell of HFSS and select "Update"

a. HFSS re-simulate the 3rd pass with its mesh and the displacement feedback

b. The profile will show information about the feedback and "Revert to Zero Displacement" will be enabled at the RMC menu of the solve setup item