1 4-wb12 1 dynamic动力学模块dynamic-pdf实例awb120_dynamics_w02b_modal

1、Workshop 2B:Modal Analysis(Model Airplane Wing)ANSYS MechanicalDynamicsANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-1July 2009Inventory #002666Workshop 2B - GoalsTraining Manual Our goal is to determine the first 5 natural frequencies and mode shapes for the prestressed model air

2、plane wing shown. Assume one end of the wing is fully fixed. The wing is made of Titanium.Fixed EndANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-2July 2009Inventory #002666Workshop 2B Project SchematicTraining ManualFrom the project schematic, insert a new Static Structural system

3、.Drop a Modal system onto the Solution cell of the Static Structural.Import the Geometry file wing.igesANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-3July 2009Inventory #002666Workshop 2B - PreprocessingTraining ManualEdit the Engineering Data cell.add Titanium Alloy from the Gene

4、ral Materials library to Engineering DataANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-4July 2009Inventory #002666Workshop 2B - PreprocessingTraining ManualReturn to the Project, and Edit the Model cell to open the Mechanical application. set the wing material assignment to Titani

5、um AlloyANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-5July 2009Inventory #002666Workshop 2B - EnvironmentTraining Manual Constrain the far end of the wing.On the Static StructuralbranchInsertFixed Supports.Switch to face selection mode as necessaryUse LMB to pick the applicable s

6、urface.Click“Apply” in the Details windowUse “Depth Picking” and/or reorient the model as necessary throughout.Depth PickingANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-6July 2009Inventory #002666Workshop 2B - EnvironmentTraining Manual Apply a pressure load to the underside of t

7、he wing.On the Static StructuralbranchInsertPressure.Switch to face selection mode as necessaryUse LMB to pick the applicable surface.Click“Apply” in the Details windowANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-7July 2009Inventory #002666Workshop 2B Static SolutionTraining Manu

8、al Solve the Static Structural model. Review the results.ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-8July 2009Inventory #002666Workshop 2B Modal SolutionTraining Manual Check the Details of Modal Analysis Settingsset Max Modes to Find to 5 set Calculate Stress to “Yes”set Calcu

9、late Strain to “Yes” Solve the Modal analysis.ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-9July 2009Inventory #0026665Workshop 2B - ResultsTraining Manual After the modal solution is completed wed like to review the modal shapes for each frequency. Click on the Modal Solution Br

10、anch in the Tree.Then LMB on the top of the Frequency Column in the “Tabular Data” region, andRMBCreate Mode Shape Results This will automatically insert “Total Deformation” objects in the Tree for all modes solved.13ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.WS2-10July 2009Invento

11、ry #002666Workshop 2B - ResultsTraining Manual To get an overall view of the Modal results step thru (LMB) the Total Deformation result objects for each mode. Remember to Animate(Play &Stop) the mode from the Timeline window. You can typically rotate the model during animation too. Note:Make a note of your highest natural Frequency mode:Max Indicated Freq = Hz. Experiment with the Vector Graphics an