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1、 2013 ANSYS, Inc.May 21, 20131Release 14.5Workshop 11:Basic Optimetrics AnalysisANSYS Maxwell 2DV16About WorkshopPuck Magnet AttractorOptmietrics is a powerful tool for obtaining optimized values of inputparameters for minimum/maximum/required value of Output parametersThis example describes how to

2、create and optimize a puck magnet producing an optimal force on a steel plate using the 2D RZ Magnetostatic solver and Optimetrics in the ANSYS Maxwell 2D Design Environment.The optimization obtains the desired force = 0.25N by varying the air gap between the plate and the puck using a local variabl

3、e.MagnetSteel Plate2 2013 ANSYS, Inc.May 21, 2013Release 14.5Problem SetupCreate Design Select the menu item Project Insert Maxwell 2D Design, or click on the iconSet Solution TypeSelect the menu item Maxwell 2D Solution TypeSolution Type Window:1. Geometry Mode: Cylindrical about Z2. Choose Magneti

4、c Magnetostatic3. Click the OK button3 2013 ANSYS, Inc.May 21, 2013Release 14.5Create ModelCreate Plate Select the menu item Draw Rectangle1. Using the coordinate entry fields, enter the position of rectangle X: 0, Y: 0, Z: 0, Press the Enter key2. Using the coordinate entry fields, enter the opposi

5、te corner dX: 5, dY: 0, dZ: 1, Press the Enter key Change the name of resulting sheet to Plate and color to Blue Change the material of the sheet to Steel 1008Create MagnetSelect the menu item Draw Rectangle1. Using the coordinate entry fields, enter the position of rectangle X: 0, Y: 0, Z: 2, Press

6、 the Enter key2. Using the coordinate entry fields, enter the opposite corner dX: 2, dY: 0, dZ: 2, Press the Enter keyChange the name of resulting sheet to Magnet and color to Red Change the material of the sheet to NdFe304 2013 ANSYS, Inc.May 21, 2013Release 14.5Create Parameter for Magnet MotionCr

7、eate Magnet MotionSelect the sheet Magnet from history treeSelect the menu item Edit Arrange Move1. Using the coordinate entry fields, enter the reference point X: 0, Y: 0, Z: 2, Press the Enter key2. Using the coordinate entry fields, enter the target point dX: 0, dY: 0, dZ: 0, Press the Enter key

8、Expand the history tree for the sheet Magnet Double click on the command Move from the tree In Properties window,1.Change Move Vector to 0, 0, move2. In Add variable window,Unit Type: LengthUnit: mm Value: 0 Press OK3. Press OK to close Properties window5 2013 ANSYS, Inc.May 21, 2013Release 14.5Modi

9、fy Magnetization Direction for PuckModify Magnetization DirectionRight click on the material NdFe30 from history tree and select PropertiesIn Select Definition window,Ensure that material NdFe30 is selectedSelect the button View/Edit MaterialIn View/Edit Material window,Change X Component to 0Change

10、 Z Component to 1Select Validate MaterialPress OKSelect OK to close Select Definition windowNote: The default magnetization direction for NdFe30 is in the X-direction.Sincemagnetization in the Z-direction is desired for this example, material propertieswill be changed accordingly6 2013 ANSYS, Inc.Ma

11、y 21, 2013Release 14.5Define RegionCreate Simulation RegionSelect the menu item Draw RegionIn Region window,1. Pad all directions similarly: Checked2. Padding Type: Percentage Offset3. Value: 3004. Press OKNote: Region will not be created in Negative X direction due to RZ-symmetry aboutthe Z-axis.7

12、2013 ANSYS, Inc.May 21, 2013Release 14.5Assign Boundary and ParametersAssign Boundary Select the sheet Region from history tree Select the menu item Edit Select All Object Edges Select the menu item Maxwell 2D Boundaries Assign Balloon In Balloon Boundary window, Press OKOn symmetry axis, “Balloon B

13、oundary” assignment is automatically skipped,Note:This can also be achieved by selecting the edges of region which are not onsymmetry axis.Assign Force Calculation Select the sheet Plate from history tree Select the menu item Maxwell 2D Parameters Assign Force In Force Setup window, Name: Force1 Pre

14、ss OK8 2013 ANSYS, Inc.May 21, 2013Release 14.5Analysis SetupNote: As we will be running Optimetrics Analysis for desired Force Value, we need toensure that the solver calculates force values accurately. This can be achieved by using Force Value as a solution Convergence criteria. Adding Expression

15、Cache in Solution Setup will enable convergence computation for added parameters.Create Analysis Setup Select the menu item Maxwell 2D Analysis Setup Add Solution Setup In Solve Setup window, General tab Maximum Number of Passes: 15 Percentage Error: 0.1 Press OKNote: Above setup will be modified in

16、 the next setup to add Expression Cache.Expression cache addition is enabled only after the creation of Analysis Setup.9 2013 ANSYS, Inc.May 21, 2013Release 14.5Analysis Setup (Contd)Modify Analysis SetupExpand the Project Manager tree to view AnalysisDouble click on Setup1 to edit its parameters In

17、 Solve Setup window,Expression Cache tabSelect AddIn Add to Expression Cache window,Category: ForceQuantity: Force1.Force_zSelect Add to Calculation and DoneChange Title to FzSelect the tab in Convergence column In Adaptive Convergence window, Use this expression for convergence: Checked Maximum Per

18、centage Delta: 0.1 Press OKPress OK to close Solve Setup window10 2013 ANSYS, Inc.May 21, 2013Release 14.5AnalyzeStart the solution process: Select the menu item Maxwell 2D Analyze AllView Solution Information Select the menu item Maxwell 2D Results Solution DataTo View Convergence Select Convergenc

19、e tabTo View Force ValuesSelect the Force tab11 2013 ANSYS, Inc.May 21, 2013Release 14.5Optimetrics SetupOptimetrics Setup It is possible to optimize position in order to obtain the specified force. For this optimization, the position will be varied to obtain a desired force of 0.25N.Specify Paramet

20、ric VariablesSelect the menu item Maxwell 2D Design propertiesIn Properties window,1. Optimization: Checked2. move: Include: Checked Min : 0 mm Max : 1 mm3. Press OKNote: Unless parameters are included in Optimization, they will not be available forOptimization Setup12 2013 ANSYS, Inc.May 21, 2013Re

21、lease 14.5Optimetrics Setup (Contd)Setup OptmizationSelect the menu item Maxwell 2D Optimetrics Analysis Add OptimizationIn Setup Optimization window,1. Optimizer: Sequential Nonlinear Programming2. Max. No. of Iterations: 103. Select Setup Calculations4. In Add/Edit calculations window, select Outp

22、ut Variables5. In Output variables window,Name: targetExpression: 0.25Select AddSet name to cost1Expression: (target - ExprCache(Fz)2Press AddPress Done13 2013 ANSYS, Inc.May 21, 2013Release 14.5Optimetrics Setup (Contd)Setup Optmization (Contd)6. In Add/Edit Calculations window,Parameter : Force1Ca

23、tegory: Output VariablesQuantity: cost1Select Add Calculation and Done7. Set Condition for cost1 to Minimize8. Change the tab to Variables9. For the variable moveStarting value: 0.5mmMin: 0 mmMax: 1 mmPress OKNote: Above Optimization Setup will vary move parameter in the range 0 to 1mm in order to minimize Cost1 which is difference between Target and Calculated valueUsers can set min and max focus points on Variables tab if probable location of minima is know.14 2013 ANSYS, Inc.May 21, 2013Release 14