Creating a Dynamics Scenario

A dynamics scenario defines which mechanisms, excitations, probes, and forces are active in the kinematics simulation.

In a dynamics scenario, position and velocity excitation laws can be created using Knowledge laws, Knowledge formulas, Knowledge rules, and Knowledge design tables.

The scenario also sets the time parameters for the simulation.

Before you begin: Open a kinematics simulation referencing a mechanism in the Mechanical Systems Experience app. app.
See Also
Accessing the Mechanical Systems Experience App
  1. If the product contains multiple mechanism representations, select the mechanism that you are simulating.

    Only one mechanism can be simulated in a single kinematics scenario.

  2. From the Scenario section of the action bar, click Dynamics Scenario .
  3. Indicate the name of the dynamics scenario to create in the Name field.
  4. In the Excitations and Probes tabs, select the law excitations and probes used to drive the simulation:
    1. Highlight a law excitation/probe in the Available column and click the right arrow to include it in the simulation.
    2. Optional: Highlight a law excitation/probe in the Referenced column and click the left arrow to remove it from the simulation.

    Note: You can include multiple law excitations or probes in a simulation as long as they do not drive related or linked commands in the mechanism. Only excitations and probes previously defined in the Mechanical Systems Experience app are listed in the dialog box.

    For more information on excitations, see Creating a Position Law Excitation, or Defining Measure Probes. For more information on probes, see Defining Interference Probes.

  5. In the Parameters tab, enter the time limits and the Result Time Step of the simulation in the Simulation Parameters section.
  6. In the Solver Parameters section, select an integrator.

    For the DASSL integrator:

    1. Click Tolerance to open the DASSL integrator tolerances dialog box.
    2. Specify an absolute and a relative tolerance value for each type of errors.
    3. Click OK.

    For the Symplectic Euler integrator:

    1. Specify the Time step min and Time step max.
    2. Specify the Penetration max.

    The value of the Time step max cannot exceed that of the Time step.

    The Contact Model is set automatically according to its associated integrator:
    • The Surfacic Contact Model for the DASSL integrator.
    • The Restitution Contact Model for the Symplectic Euler integrator.
  7. Optional: Click Preview to launch a dynamics simulation based on the selected excitations, probes and parameters.

    The Preview option does not generate simulation results.

    To exit the simulation and open the Dynamics Scenario dialog box again, press Esc.

  8. Click OK.
    A dynamics scenario is created in the tree.