WS11-1 WORKSHOP 11 ANCHOR LOADS AND BOUNDARY CONDITIONS USING A FIELD PAT301, Workshop 11, October 2003

WS11-2 PAT301, Workshop 11, October 2003

WS11-3 PAT301, Workshop 11, October 2003 n Problem Description u The anchor TetMesh that was created previously has two types of loads and boundary conditions applied to it. First, a pressure load is applied. To do this, it is necessary to create a cylindrical coordinate system where the pressure is to be applied. Then, a field (PCL function) sin( ) is created. Finally, the pressure is created at the top of the two holes found at the top of the model. In addition, constraints where the three washers are to be placed are created. The washers are to go at the top of the three holes at the bottom of the model.

WS11-4 PAT301, Workshop 11, October 2003 n Suggested Exercise Steps 1. Open an existing database called Anchor.db. 2. Plot only the solid created and geometric points. 3. Create a point at the center of an arc where the pressure load will be applied. Do this again. 4. Create a cylindrical coordinate system using the two points just created. 5. Create a sinusoidal field for the pressure load. 6. Create pressure load at the top of the two highest holes in the solid. 7. Create constraints where the three washers are to be. 8. Show all Loads/BCs markers. 9. Quit MSC.Patran.

WS11-5 PAT301, Workshop 11, October 2003 Step 1. Open Database Open existing database called Anchor.db a.File / Open. b.Select Anchor.db. c.Click OK. a b c

WS11-6 PAT301, Workshop 11, October 2003 Step 2. Plot Only Solid and Points Plot only the solid and geometric points. a.Click Wireframe icon. b.Click Plot/Erase icon. c.Click Erase for All. d.Enter Solid 1 Point1:# for Selected Entities. e.Click Plot then OK. f.Click View corners icon and see figure for dragging. a b c d e f f

WS11-7 PAT301, Workshop 11, October 2003 Step 3. Create Point at Center of Arc Create point at center of arc using ArcCenter. a.Geometry: Create / Point / ArcCenter. b.See Figure for Curve List. Make sure to select on the Edge icon. a b

WS11-8 PAT301, Workshop 11, October 2003 Step 4. Create Cylindrical Coordinate System Create cylindrical coordinate system using 3Point method. a.Geometry: Create / Coord / 3Point. b.Select Cylindrical for Type. c.See figure for Origin. d.See figure for Point on Axis 3. e.See figure for Point on Plane 1-3. a b c d e c d e

WS11-9 PAT301, Workshop 11, October 2003 Step 5. Create Field for Pressure Loading Create field that uses sin (theta). a.Fields : Create / Spatial / PCL Function. b.Enter sine_theta for Field Name. c.Select Scalar for Field Type. d.Select Real for Coordinate System Type. e.Select Coord 2 for Coordinate System. f.Enter sinr( then pick T at the bottom of the form. Then, close expression with ). g.Click Apply. a b c d e f

WS11-10 PAT301, Workshop 11, October 2003 Step 6. Create Pressure Loading Use the field to create pressure loading. a.Loads/BCs: Create / Pressure / Element Uniform. b.Enter pressure_load for New Set Name. c.Click Input Data… d.Enter 1000 for Load/BC Set Scale Factor. e.Click in the Pressure box then select sine_theta from the Spatial Fields box. f.Click OK.. g.Click Select Application Region… a b c d e f g

WS11-11 PAT301, Workshop 11, October 2003 Step 6. Create Pressure Loading (Cont.) Select entities for application region for pressure loading. a.Select Geometry for Geometry Filter. b.See Figure for Select Solid Faces. Select the four faces at top of holes. c.Click Add. d.Click OK. e.Click Apply. a b d e c

WS11-12 PAT301, Workshop 11, October 2003 Step 6. Create Pressure Loading (Cont.)

WS11-13 PAT301, Workshop 11, October 2003 Step 7. Constrain at Washers Constraint at location of three washers. a.Loads/BCs: Create / Displacement / Nodal. b.Enter fix_at_washers. c.Click Input Data… d.Enter for Translations only. e.Click OK f.Click Select Application Region.. a b c d e f

WS11-14 PAT301, Workshop 11, October 2003 Step 7. Constrain at Washers (Cont.) Select solid faces at location of washers a.Use Mouse rotate icon and rotate to the view as shown. b.Click Smooth Shade icon. (easier to view) c.Select Geometry for Geometry Filter. Click on the Surface or face icon. d.See Figure for Select Geometry Entities. (8 faces) e.Click Add, OK and Apply. f.Click Wireframe icon. a b c d e f e e

WS11-15 PAT301, Workshop 11, October 2003 Step 8. Plot Loads/ BCs Markers for Pressure and Constraints Plot markers for load and boundary conditions. a.Loads/BCs: Plot Markers. b.Select Displ_fix_at_washers and Press_pressure_load for Assigned Load/BC Sets. c.Select Current Viewport for Group filter. d.Select default_group for Select Groups. e.Click Apply. a b c d e

WS11-16 PAT301, Workshop 11, October 2003 Step 9. Quit MSC.Patran Quit MSC.Patran a.Select File on the Menu Bar and select Quit from the drop down menu a