Adams Basic Package > Adams View > Adams View > Testing Models > Simulation > Managing Simulation Results

Managing Simulation Results

 
Setting Model Back to Initial Design Configuration
Saving Simulation Results
Deleting Simulation Results
Saving a Simulation Frame as New Model
Saving a Simulation State as New Model
You can save and delete simulation results, as well as create a new model based on the simulation results.
Learn more:

Setting Model Back to Initial Design Configuration

After you animate your simulation results, you must set your model back to its initial design configuration if you want to modify your model or perform another simulation starting at time 0.
Note that you do not have to set the model back to its design configuration to continue simulating. You can pick up from the last frame of your animation and continue.

To set a model back to its design configuration, do either of the following:

■From either the Simulation container on the Main toolbox or the Simulation Controls dialog box, select the Simulation Reset tool .
■Double-click the Select Tool .

Saving Simulation Results

By default, Adams View saves the results of the last Simulation that you performed. You can save simulation results so you can animate or plot the results at a later time. Saving simulation results is particularly important when you want to compare the results from several design variations.
Be sure to save your Modeling database after you save your simulation results (File -> Save Database).
 
Note:  
By default, the results of a simulation are only saved to the Modeling database, not to external Adams Solver analysis files. To save the results to external Adams Solver analysis files, set the simulation output before you run the simulation, as explained in Setting Simulation Controls. To export the results to analysis files, see Export - Adams Solver Analysis Files.

To save simulation results:

1. From the Simulation Controls dialog box, select Save Results to Database tool .
The Save Run Results dialog box appears.
2. In the Name box, enter the name that you want to give to the results set that you are storing.
3. If you want Adams View to automatically increment the run names when you save subsequent simulations, select Auto-Increment Name.
4. Select OK.

Deleting Simulation Results

 
Note:  
You must have saved your Modeling database before you can delete simulation results (File → Save Database).

To delete simulation results:

1. From the Simulation Controls dialog box, right-click the Save Results to Database tool to display its toolstack.
2. From the toolstack, select the Delete Results from Database tool .
The Database Navigator appears.
3. Select the names of the simulations you want to delete.
4. Select OK.

Saving a Simulation Frame as New Model

You can copy a frame from a simulation as a new model, and use it as your design configuration.
You will find this helpful, for example, when your original design configuration had broken joints in it that result in warning messages during model verification. After performing an assemble simulation, which repairs the broken joints, you can use the resulting animation frame as the starting configuration for a new model. You could also save an equilibrium configuration resulting from a static simulation as the starting configuration of a new model. This would help you avoid having to perform a static simulation before each dynamic simulation.
 
Note:  
The resulting model will not show display the flexible body in its deformed state. It displays the shape of the flexible body as defined in the original modal neutral file (MNF). A subsequent analysis first frame will display the deformed shape. Therefore, one should be cautious if adding any modeling objects (for example, applied forces or joints) and locating them on the basis of a flexible body node from such an exported model since there could be a difference between where the node appears while pre-processing and where it actually is due to the initial conditions enforced at the start of an analysis. Adams Solver will automatically reconcile such differences in I and J marker location and note this in its output to the message window and/or .msg file.
FE Parts will take the deformed shape, however they will not be preloaded. They will simply refer to a newly deformed reference curve.

To save a frame as a new model:

1. From the Simulation Controls dialog box or Animation Controls dialog box, select the Save Model at Simulated Position tool .
The Save Model at Simulation Position dialog box appears.
2. In the New Model text box, enter the name of the model to be created from the animation frame.
3. Enter the simulation and frame number you want to save as the initial configuration of the new model.
4. Select OK.

Saving a Simulation State as New Model

You can create a new model with states from a simulation in existing model, and use it as your design configuration with this command. You will find this helpful, for example, when you want to start a new simulation from where a previous simulation ended. The configuration of original model at the time you want will be copied as a new model, and states will be applied as initial conditions, for example, displacement, velocity of rigid and flexible bodies or state variables. Also, initial loads of force elements will be defined as initial conditions of a new simulation. The resulting copied model may or may not run smoothly and continuously from a previous simulation. This is because some states may not be applied to the new model, for example, accelerations or Lagrange multipliers. In these cases, the simulation of the copied model may be unstable. To mitigate these effects it is recommended to run with tighter error tolerance and/or run with GSTIFF SI2. Because the SI2 integrator controls error on velocity states, the initial velocities in the saved model will be better. One could even consider running with I3 for most of the time, but switching to SI2 a little before the output step at which you want to save the model.
To save a frame as a new model:
1. From the Simulation Controls dialog box or Animation Controls dialog box, select the Save Model at Simulated State tool .
The Save Model at Simulation State dialog box appears.
2. In the New Model text box, enter the name of the model to be created from the animation frame.
3. Enter the simulation and time you want to save as the initial configuration of the new model.
4. Check if you want to shift all time variables in runtime functions.
5. Select OK.
 
Notes:  
1. States coming from user-authored Adams Solver subroutines are ignored.
2. No support Adams Controls co-simulation scenarios, though external system library (ESL) import scenarios are supported.
3. Part accelerations are not carried into the saved model.
4. Internal forces in FE Parts are not carried into the saved model.
5. Angle functions’ (AX, AY, AZ) values will not “wrap;” they will reset to the corresponding value between 0-360o.
6. Joint friction’s stiction regime “creep” value will reset to zero (this value tracks displacement of part and applies spring-like force based on small displacements when velocity near zero).
7. Curve constraints will see small difference in initial conditions between the original model (at simulated time) and the starting state of the saved model since Adams Solver must re-compute the curve parameter based on exported position.
8. Due to integrator differences operating on an initial conditions problem vs. a transient problem, some values may not match exactly between the saved model and exported step of the original model; specifically forces, state variables and differential states (DIFs, LsE, GSE). If such small differences become an issue, running with tighter error control may mitigate the effect.
9. FE Parts will take the deformed shape and the preload necessary to get them into this deformed shape is applied via the reference to a preload (.mtx) file which is automatically generated while saving the simulated output steps states into the new model. After this operation very little about the FE Part can be modified (otherwise the preload file is invalidated) so the FE Part Modify wizard will have a number of fields disabled.
10. Integrator states are not supported. For example, the integration order of GSTIFF is not restored, and this could cause differences in damping. To avoid these differences, try switching to HHT since it is constant order 2 integrator, or set KMAX=1 in GSTIFF. If KMAX=1 adds too much damping to the solution, try using a tighter error or smaller HMAX instead.