Setting up a Design Study and Defining Surrogates

You set up a Sweep design study with surrogates that match the parameters required for the 1D system simulation in Simcenter Amesim.

  1. In the Design Manager project file, right-click the Design Studies node and select New.
    A new design study is created that uses the default Study Type, Sweep.
  2. Rename the created Design Study to flapper_sweep.
To add design input parameters:
  1. Select the Design Studies > flapper_sweep > Input Parameters node and set Parameters to contain the following global parameters from the reference simulation:
    • Operation_ValveOpening
    • Operation_PressureGauge_Inlet
Based on the original 1D fluid system simulation without 3D coupling, you specify the ranges of valve opening and pressure at inlet. For the Sweep design study, the ranges given are based on prior experience with these types of system. When no specific range is predictable for a certain parameter, aim to cover a reasonably large design space for higher accuracy in the surrogate model.
  1. Select the Input Parameters > Operation_PressureGauge_Inlet > Continuous node and set the properties as follows:
    Property Setting
    Range [-16.0,4.0] bar
    Increment 5.0 bar
    Resolution 5 (automatically computed)
  2. Select the Input Parameters > Operation_ValveOpening > Continuous node and set the properties as follows:
    Property Setting
    Range [0.0,4000.0] um
    Increment 800.0 um
    Resolution 6 (automatically computed)
To add design responses:
  1. Select the Design Studies > flapper_sweep > Responses node and set Responses to contain the following reports:
    • Flow Rate BAOT

      This flow rate is defined as (abs(${Flow Rate Inlet} <= 1.0e-18)? 0: -${Flow Rate Inlet}. It is the reverse quantity of the Flow Rate Inlet with a floating point limit.

      According to the Simcenter Amesim set up in the starting file flapperValve_1DAmesim.ame, a negative flow rate is expected as the output of the FMU sub-model. The negative sign indicates that the flow is leaving the flapper valve.

    • Force Vertical
To add the pre-defined scenes from the reference simulation to all the design runs:
  1. Select the Design Studies > flapper_sweep > Scenes node and set Scenes to contain the following items:
    • Pressure
    • Section
    • Velocity
For each response you specify a surrogate. Design Manager populates the surrogates while it runs the design study.
  1. Right-click the Design Studies > flapper_sweep > Surrogates node and select New Surrogate.


  2. Rename the Surrogate node to Surrogate_FlowRate and set its properties as follows:
    Node Property Setting
    Surrogate_FlowRate Response [Flow Rate BAOT]
    Kriging Tuning Precise Kriging
  3. Right-click Design Studies > flapper_sweep > Surrogates node and select New Surrogate.
  4. Rename the Surrogate node to Surrogate_Force and set its properties as follows:
    Node Property Setting
    Surrogate_Force Response [Force Vertical]
    Kriging Tuning Precise Kriging
  5. (Optional) To enable multi-editing of the created surrogates, right-click the Design Studies > flapper_sweep > Surrogates node and selecting Edit Surrogate .
    The Surrogate Table is opened up for editing. See also: Edit Surrogates.
  6. Save the Design Manager project.