Hypermesh110 HM3400 Creating Connectors.docx

1、Hypermesh110 HM3400 Creating ConnectorsHM-3400: Creating ConnectorsHM-3400: Creating ConnectorsIn this tutorial, you will learn how to:Weld the two front trusses to each other by creating connectors at pre-defined weld pointsWeld the two front trusses to the reinforcement plate by creating connector

2、s between shell elementsWeld the right rails to each other and to the front trusses by creating connectors from a master connectors fileUpdate weld type of NASTRAN/OPTISTRUCT ACM (area contact method) welds, which already connect the rear trusses to each other, by first creating connectors from thes

3、e welds and then realizing the connectors into two-noded weld elements.ExerciseThis exercise uses the model file, frame_assembly.hm. Weld the two front trusses by creating connectors between geometry surfaces at pre-defined weld points.Step 1: Retrieve and view the model file.1.Open the model file,

4、frame_assembly.hm.2.Take a few moments to observe the model using various visual options available in HyperMesh (rotation, zooming, etc.).3.From the menu bar, select Preferences User Profiles.4.Select RADIOSS, then Bulk Data.5.Click OK to load the user profile.Step 2: Display only the assembly assem

5、_1 for elements and geometry. 1.Select Model view () in the Model browser and expand the Assembly Hierarchy tree.2.Verify that the entity selection is set to Elements and Geometry (). This turns on/off both elements and geometry when performing right-click operations in the Model Browser.3.Right-cli

6、ck on assem_1 and select Isolate. This will only display the components that are in the assem_1 assembly.Step 3: Load the Connector Browser.1.Using the menu bar select View Browsers HyperMesh Connector.2.Review the layout of the Connector Browser. The Connector Browser allows users to view and manag

7、e the connectors in their model. The top portion of the browser is called the Link Entity Browser and displays information for the linked entities in the model. The lower portion is called the connector window and it contains a list of the connectors in the model. The connectors will be grouped base

8、d on the type of connection. Currently there are no components or connectors listed because there are no connectors in the model.Step 4: Create welds between the geometry for the two front trusses at the pre-defined weld points.There are two methods for creating connectors: automatic and manual. The

9、 automatic approach creates and realizes connectors automatically. The manual approach allows you to create the connector manually, and then realize the connector manually. Realization is the process in which the connector creates the weld entity.To create connectors automatically, access the spot,

10、bolt, seam, and area panels within the Connectors Browser module. To create connectors manually, go to the create and realize subpanels.1.Access the Spot panel: right-click in the Connector Browser in the connector window and select Create Spot.2.Access the spot subpanel.3.Verify that the current co

11、mponent is Con_Frt_Truss.4.Switch the location: entity selector to points.5.Select the six pre-defined weld points by selecting points by collector and selecting the component Con_Frt_Truss.6.Click select.7.For connect what:, click comps and select the components Front_Truss_1 and Front_Truss_2.8.Cl

12、ick select.9.For connect what:, toggle elems to geom.10.For tolerance = specify 5. The connector will connect any selected entities within this distance of itself.11.For type=, select weld.12.Click create.13.Click return.The six connectors are automatically created and realized (notice the message i

13、n the status bar). The green connectors indicate that the creation of the weld entity was successful. The connectors are organized as geometry (not elements) in the current component collector, Con_Frt_Truss.There are three states of connectors: realized (green ), unrealized (yellow ), and failed (r

14、ed ). The color of the connectors change from yellow to green (if created manually), indicating they are realized into weld elements. As mentioned before, if created automatically they will be green immediately as there is no interim unrealized (yellow) state. Fixed points were added to the surfaces

15、 at the ends of the weld elements to guarantee connectivity between the weld elements and the shell mesh that will be created on the surfaces.Weld element with fixed points created on the surfacesStep 5: Review the Connector Browser.1.In the connector window in the Connector Browser, click the + nex

16、t to RBAR. This contains a listing of the six connectors just created. They are all grouped under RBAR because that is the type of connector created. Notice the ID of the connector under Entities, the Links of the connector, and the State of the connector. You may need to increase the size of the ta

17、b area to the right to see the State column.2.In the Link Entity Browser in the Connector Browser, right-click Front_Truss_1 and select Find. This isolates this component in the graphics area. It also highlights the six connectors in the connector window to indicate that these connectors have Front_

18、Truss_1 as a link.3.Right-click Front_Truss_1 again, and this time select Find Attached. This will find the components that are attached to Front_Truss_1 through connectors. Notice that Front_Truss_1 and Front_Truss_2 are now both highlighted in the Link Entity Browser to indicate that they have bee

19、n displayed in the graphics area.Step 6: Create a shell mesh on the two front truss components.1.Press F12 to go to the Automesh panel.2.Access the size and bias subpanel.3.Select the mesh mode automatic. (It currently may be interactive.)4.Select surfs displayed.5.For elem size =, specify 10.6.For

20、mesh type, select mixed.7.Verify that the toggle is set to elems to surf comp. (It currently may be elems to current comp.)8.Click mesh to mesh the surfaces.9.Zoom into the area with a connector and see how the fixed point created from the weld has ensured the mesh seeding passes through the weld.10

21、.Click return to return to the main menu.Step 7: Display only the assembly assem_2 for elements and geometry. Weld the two front trusses to the reinforcement plate by creating connectors between shell elements at pre-defined weld points.1.Within the Model Browser, verify that Elements and Geometry i

22、s the current selection type.2.Right-click on assem_2 and select Isolate.Weld the two front trusses to the reinforcement plate.Step 8: Create connectors between the shell mesh for the front trusses and the reinforcement plate at pre-defined points.Perform the following steps to create and realize th

23、e connectors manually.1.Use the Model Browser to set the current component to Con_Truss_Plate.2.Go to the Connector Browser.3.Right-click in the connector window and select Create Spot.4.Access the create subpanel.5.For location:, select points.6.Select points by collector and select the component C

24、on_Truss_Plate.7.Click select.8.For connect what:, select the following components:Front_Truss_1Front_Truss_2Reinf_Plate9.Click select.10.For connect what:, toggle geom to elems.11.Verify that num layers is set to total 2.12.Verify that connect when: is set to now.13.Click create to create connector

25、s at the selected weld points. Notice that the status bar says 8 spot connectors created with comps and links. The connectors are organized into the current component collector, Con_Truss_Plate.14.Notice in the Connector Browser that these eight connectors are currently grouped as undefined and that

26、 the color of the connectors is yellow to indicate they are unrealized. 15.Click the + next to undefined and notice the status of the eight connectors is unrealized. In the next step, you will realize the connectors and assign a connector type.Step 9: Realize the connectors in the component Con_Trus

27、s_Plate into weld elements.1.Go to the realize subpanel.2.Zoom into the Reinf_Plate and select the 4 connectors along the top.3.For type=, select weld.4.For tolerance =, enter 7. 5.Verify the selection is set to mesh dependent from mesh independent.When the option mesh dependent is active, if the re

28、alized finite element of the connector is coincident to a node of the shell mesh it is being connected to, the nodes are equivalenced. If there are no suitable nodes present, this option will partition the mesh accordingly to ensure the mesh seeding passes through the weld point. 6.There are two opt

29、ions available for mesh dependent. Verify that adjust realization has been selected7.Click realize to realize the selected connectors into weld elements. Notice how the mesh hasnt been remeshed to connect the two components. 8. Make the connectors selector active and select the 4 connectors along th

30、e bottom on the plate.9. Under mesh dependent, set the toggle to adjust mesh. 10. The two options under adjust mesh are remesh and quad transition. Select remesh.11. Click realize to realize the selected connectors. This time the mesh has been remeshed to connect the two components.The two front tru

31、sses welded to the reinforcement plate with weld elements at the connectors Step 10: Display only the assembly assem_3 for elements and geometry. 1.Within the Model Browser, verify that Elements and Geometry is the current selection type.2.Right-click assem_3 and select Isolate.Weld the two right rails to each other