Introduction to ANSYS DesignXplorer

Transcription

1 Overview Release Introduction to ANSYS DesignXplorer ANSYS, Inc. September 27, 2013

2 What is DesignXplorer? DesignXplorer (DX) is a tool that uses response surfaces and direct optimization to efficiently explore the solution space. Explore and understand the performance at other design or operating conditions Find the conditions which give the best performance Determine the key parameters influencing the design Explore the robustness of the design??? Single Point What If? Response Surface ANSYS, Inc. September 27, 2013

3 DX Features List of DX Features (discussed on following slides and lectures) What if Study [does not require a DX license] Parameter Correlation Design of Experiments Response Surface Min/max search Surface/XY plots Sensitivities Direct and response surface Optimization and trade-off plots Robustness of design Six Sigma Robustness Evaluation ANSYS, Inc. September 27, 2013

4 DX Features What if Study Automatically run through a list of manually specified design points [does not require a DX license] ANSYS, Inc. September 27, 2013

5 DX Features Parameter Correlation 1. Identify unimportant parameters Input Parameter Output Parameter Output parameters not sensitive to force variations ANSYS, Inc. September 27, 2013

6 DX Features Parameter Correlation 2. Identify the degree to which the relationship is linear/quadratic ANSYS, Inc. September 27, 2013

7 DX Features Design of Experiments Specify the DOE Type Specify the range for each parameter DX uses a DOE to select design points with parameter combinations intended to explore the solution space efficiently works best for fewer than 20 parameters ANSYS, Inc. September 27, 2013

8 DX Features Response Surface A continuous response surface is formed from the DPs Various formulations available A response surface can be quickly explored by other DX features Parameter 1 Curve fit response Design Points ANSYS, Inc. September 27, 2013

9 DX Features Response Surface Min/max search Surface/XY plots Sensitivities; Optimization and trade-off plots Robustness of design ANSYS, Inc. September 27, 2013

10 DX Features Six Sigma Robustness Evaluation Input parameters vary! Output parameters Understand how your performance will vary with your design tolerances Determine how many parts will likely fail Understand which inputs require the greatest control ANSYS, Inc. September 27, 2013

11 DX Small effort/cost, huge benefits. Understanding Innovation ROI ANSYS, Inc. September 27, 2013

12 Interface Release Introduction to ANSYS DesignXplorer ANSYS, Inc. September 27, 2013

13 General Workflow ANSYS, Inc. September 27, 2013

14 Parameters Workbench Applications that allow for parameterization: External CAD package Engineering data DesignModeler Meshing Mechanical Mechanical APDL ExplicitSTR CFX Fluent CFD-Post VistaTF Polyflow SpaceClaim External Connections Excel AQWA ncode Ansoft Solutions (HFSS, Maxwell) ANSYS, Inc. September 27, 2013

15 Parameters Parameterizing CAD dimensions In Workbench Options > Geometry Import, enable Parameters and specify a filtering prefix and suffix The default filterer is DS. Example: To expose a CAD parameter named Length in Workbench, it could be renamed as dslength, Lengthds, ds_length, Length_ds, etc. (the order is arbitrary as is the underscore and the case). Leaving the filter blank will cause all CAD parameters to be passed to Workbench ANSYS, Inc. September 27, 2013

16 Parameters Parameterizing WB dimensions, BCs, etc. Parameter definition based on ANSYS Mechanical APDL input files Input and output parameters created in CAD, DM, AMP, Mechanical Output parameters created from Input parameter created from an Input parameter created from an an expression in ANSYS CFD expression in ANSYS CFX expression in ANSYS FLUENT Post ANSYS, Inc. September 27, 2013

17 Parameters Derived Parameters Derived Parameters: Parameters created using analytical expressions composed of input and output parameters. Derived parameters can be defined using various built in arithmetic, trigonometric and statistical functions. Examples include (but are not limited to): cost function (i.e., the product of mass and cost per mass) normalized stress (i.e., stress response divided by an applied stress) Mesh sizing (setting a mesh parameter as a function of a geometric parameter) ANSYS, Inc. September 27, 2013

18 Parameter Set All input and output parameters Table of Design Points [discussed on following slides] Chart options Create derived Parameter Properties of selected parameter Charts [discussed on following slides] ANSYS, Inc. September 27, 2013

19 Parameter settings currently loaded in applications Parameter Set Table of Design Points ( What-If Study) Update All Design Points Select Export to retain files associated with the Design Point RMB > Update Selected Design Points Status bar gives more info about design points update ANSYS, Inc. September 27, 2013

20 BAD GOOD Flow Uniformity Bad Good Parameter Set Charts Parameters Charts allow users to configure and plot Input vs. Output in XY plots. show the chart output vs. input parameter. Show how output parameters vary for design point combinations. Pressure Drop ANSYS, Inc. September 27, 2013

21 DX Parameter Correlation DX layout is very similar to Parameter Set ANSYS, Inc. September 27, 2013

22 DX Design of Experiments Charts ANSYS, Inc. September 27, 2013

23 DX Response Surface ANSYS, Inc. September 27, 2013

24 DX Response Surface Optimization ANSYS, Inc. September 27, 2013

25 DX Direct Optimization A Direct Optimization system is a single-component system that utilizes real solves. Is not dependent on the quality of a response surface. Retrieve information via data links from other components that contain design point data, thus reducing the time needed for the optimization without altering the original source of the design points. To add a Direct Optimization system to your project, drag it from the Design Exploration section of the Workbench Toolbox and drop it on your Project Schematic ANSYS, Inc. September 27, 2013

26 DX Six Sigma Analysis ANSYS, Inc. September 27, 2013

27 Unified Reporting DX Systems contribute to the unified report Includes all DX tables and Charts ANSYS, Inc. September 27, 2013

28 Reset Windows Layout View > Reset Window Layout The window types are connected between the various Workbench Native applications. If you close the chart on one, it is closed on the others. Use View > Reset window Layout if you get stuck ANSYS, Inc. September 27, 2013

29 Summary DX provides plenty of functionality to allow you to gain a deeper understanding of your problem Each tool within DX has a user interface that follows a common methodical workflow ANSYS, Inc. September 27, 2013

30 Input 2 Workshop 1 Excel will receive two inputs from Workbench (must be between 0 and 100) and calculate the value of two output parameters according to the following equations: Out_1 = -2*(in_1/ )^3+SIN(2*PI()*in_2/100) Out_2 = (in_1/ )^2+(in_2/ )^2 Plotting Out_1 in Excel produce the following charts. Notice that the maximum value of out_1 occurs at approximately (in_1,in_2)=(0, 25) Output Output Input 1 Input ANSYS, Inc. September 27, 2013

31 Input 2 Workshop 1 Plotting Out_2 in Excel produce the following charts. Notice that the maximum value of out_2 occurs at approximately (in_1,in_2)=(50, 50) Since there is no set of input parameters that delivers the maximum values of both out_1 and out_2, a tradeoff analysis will need to be conducted when finding the optimal conditions Output Output Input 1 Input ANSYS, Inc. September 27, 2013