SYSWELD之T型接头建模及网格划分

Visual-MeshV3.0Tutorial 13:CAD for ‘T’ Weld JointVTS-3.0-ME-AT-12This working document and related know-how herein provided by ESI Group subject to contractual conditions are to remain confidential. The client shall not disclose the documentation and/or related know-how in whole or in part to any third party without the prior written permission of ESI GroupCopyright © ESI Group, 2007. All rights reserved.Prerequisites:It is recommended to have familiarity with the basic features of Visual Mesh.Objective:In this tutorial you will learn how to use Surface and Curve options in Visual Mesh effectively to created CAD model which will represent a Weld JointDescription:In Visual Mesh there are many CAD (Surfaces and Curves) generation and editing methods. We have send some of the CAD editing features in previous tutorials. In the following tutorial you will learn to generate Surfaces and Curves on a new model which will be representation of the weld model, a ‘T’ Joint.Outline:Loading Model ............................................................................... 错误!未定义书签。

Ground Plate Modeling................................................................. 错误!未定义书签。

Rib Modeling .................................................................................. 错误!未定义书签。

Filler Material ModelingGap ModelingCurves GenerationParts ManagementSaving the ModelDuration:This tutorial will take approximately 25 minutes to execute.Files used:This tutorial uses a new model, Document1.vdbLoading Model•Invoke Visual-Mesh.•Click File -> New or press CTRL+N Files•New model window will start with the default name of Document1.vdbGround Plate ModelingNodes Creation•Post By XYZ, Locate… GUI from Nodes menu (Nodes -> By XYZ, Locate…) or hit F8 key•With default Node creation method, in the posted GUI enter the 0, -60,10 in the X, Y & Z fields respectively• The default method will be XYZ and the default ID 1 for the new Node.Click on Create Node and see in the model window that there will be a new node.•For Node 2, enter 0, 60, 10 in the X, Y, Z fields and click on Create Node.•For Node 3, enter 0, -60, 0 in the X, Y, Z fields and click on Create Node.•For Node 4, enter 0, 60, 0 in the X, Y, Z fields and click on Create Node.•The new nodes will have IDs of 1, 2, 3 and 4 respectively.•Close the By XYZ, Locate…To Create a Surfaces with the required size, you need to create Nodes. With the help of these nodes Surface and curves will be created.Surface Creation by Blend•Post Blend GUI from Surface menu (Surface -> Blend (Spline) )•Change Mesh only option to Surf Only option•In the model window pick Node 1 & Node 2 and confirm by middle mouse button. This becomes first primary edge for the blend Surface. •Pick Node 3 & Node 4 and confirm by middle mouse button. This becomes second primary edge for the blend Surface.•Click on OK to confirm. The new surface will be created and it will be in Part 1 which is default.Surface Creation by Sweep•Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) )•Change sweeping curve option to Multiple Curves and enter 200 in the Distance field.•Change Mesh only option to Surf Only option•Enter 1 in Part ID filed•Pick the top edge of the newly created Surface as shown in the below picture and confirm•After confirming the sweep curve selection, a Vector Definition GUI is posted•Select Global Axis as the Vector definition option and click on Flip to make the vector in - X direction•Click on Ok/Close in the Vector Definition GUI to accept the Vector and close the GUI•Look the preview of the surface to be generated and confirm it by clicking on Ok in Sweep GUIFollow the same above steps and generate 3 more sweep surfaces by selecting the remaining 3 edges of the blend surface. 1 Blend surface and 4 Sweep surfaces will look like as shown in the picture below.Now you need to copy the Blend surface on the other ends of the Sweep surfaces to represent the closed volume of the Ground plateSurface Transform•Post Surface Transform GUI from Surface menu (Surface -> Transform)•Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field•Select the Surface created by blend and confirm by clicking on Update Entities•Toggle Copy option and keep the other options default•Confirm the transformation by Clicking on CopyThis completes the modeling of the Ground plate. Now we will model the Rib Plate.Rib ModelingNodes Creation•Post By XYZ, Locate… GUI from Nodes menu (Nodes -> By XYZ, Locate…)•With default Node creation method, in the posted GUI enter the 0, -5,12 in the X, Y & Z fields respectively. The ID of the new Node will be 5.•Click on Create Node and see in the model window that there will be a new node.•For Node 6, enter 0, -5, 72 in the X, Y, Z fields and click on Create Node.•For Node 7, enter 0, 5, 12 in the X, Y, Z fields and click on Create Node.•For Node 4, enter 0, 5, 72 in the X, Y, Z fields and click on Create Node.•The new nodes will have IDs of 5, 6, 7 and 8 respectively.•Close the By XYZ, Locate…Surface Creation by Blend•Post Blend GUI from Surface menu (Surface -> Blend (Spline) )•Change Part ID as 2 and keep other options default•For first primary, pick Node 5 & Node 6 and confirm by middle mouse button.•Pick Node 7 & Node 8 and confirm by middle mouse button. This becomes second primary edge for the blend Surface.•Click on OK to confirm. The new surface will be created and it will be in Part 2Surface Creation by Sweep•Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) )•Make sure that the default options in the GUI are Multiple Curves, Distance 200 and Part ID 2.•Pick one edge of the blend surface created in the previous step•When Vector Definition panel is posted see that the default option method will be Global Axis with X – Axis. If required use Flip option to get the surface as shown in below pictureFollow the same above steps and generate 3 more sweep surfaces by selecting the remaining 3 edges of the blend surface. 1 Blend surface and 4 Sweep surfaces will look like as shown in the picture belowSurface Transform•Post Surface Transform GUI from Surface menu (Surface -> Transform)•Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field•Select the Surface created by blend of Part 2 and confirm by clicking on Update Entities•Toggle Copy option and keep the other options default•Confirm the Surface transform by clicking on Copy in the GUI and close the GUIThis completes the modeling of the Rib plate. Now we will model the Weld Bead.Filler Material ModelingNodes Creation•Post By XYZ, Locate… GUI from Nodes menu (Nodes -> By XYZ, Locate…) or hit F8 key•With default Node creation method, in the posted GUI enter the 0, 5,16 in the X, Y & Z fields respectively. The ID of the new Node will be 5.•Click on Create Node and see in the model window that there will be a new node.•For Node 6, enter 0, 5, 10 in the X, Y, Z fields and click on Create Node.•For Node 7, enter 0, 11, 10 in the X, Y, Z fields and click on Create Node.•The new nodes will have IDs of 9, 10 and 11 respectively.•Close the By XYZ, Locate… GUISurface Creation by Blend•Post Blend GUI from Surface menu (Surface -> Blend (Spline) )•Change Part ID as 3 and hit Enter and keep other options default •For first primary, pick Node 9 & Node 10 and confirm by middle mouse button.•Pick Node 11 & Node 10 and confirm by middle mouse button. This becomes second primary edge for the blend Surface.•Click on OK to confirm. The new surface will be created and it will be in Part 3Surface Creation by Sweep•Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) )•Make sure that the default options in the GUI are Multiple Curves, Distance 200 and Part ID 3.•Pick one edge of the blend surface created in the previous step•When Vector Definition panel is posted see that the default option method will be Global Axis with X – Axis. If required use Flip option to get the surface as shown in below picture•Follow the same above steps and generate 2 more sweep surfaces by selecting the remaining 2 edges of the blend surface.Surface Transform•Post Surface Transform GUI from Surface menu (Surface -> Transform)•Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field•Select the Surface created by blend of Part 3 and confirm by clicking on Update Entities•Make a Copy of the surfaces at the other end. It should be as like done for the Ground PlateThis finishes modeling of the Filler Material. Now you will model the Chewing Gum materialGap material ModelingNodes Creation by Node Drop•Change Entity Selector to Nodes and click on the Disp ID icon. See the picture below•Select all the nodes and see that all the nodes IDs are displayed in the model window•Remove the Node Selection by hitting ESC key or clicking on hitting CTRL+D•Post Drop Points/Curves/ Nodes GUI from Nodes menu.(Nodes -> Drop (Project))•With all defaults options, select the Node 5 (N -5) and confirm by middle mouse button or click on Update Entities•Click on Select Surfaces and pick the top surface of the Ground Plate•Change the Move option to make a Copy•Confirm the Copying of the Node by clicking on OK and close the GUI. Surface Creation by Blend•Post Blend GUI from Surface menu (Surface -> Blend (Spline) )•Change Part ID as 4 and hit Enter and keep other options default •For first primary, pick Node 5 & Node 7 and confirm by middle mouse button.•Pick Node 12 & Node 10 and confirm by middle mouse button. This becomes second primary edge for the blend Surface.•Click on OK to confirm. The new surface will be created and it will be in Part 4Surface Creation by Sweep•Post Sweep GUI from Surface menu (Surface -> Sweep (Drag) )•Make sure that the default options in the GUI are Multiple Curves, Distance 200 and Part ID 4.•Pick one edge of the blend surface created in the previous step •When Vector Definition panel is posted see that the default option method will be Global Axis with X – Axis. If required use Flip option to get the proper surfaces between the Rib and the Ground Plate •Follow the same above steps and generate 3 more sweep surfaces by selecting the remaining 3 edges of the blend surface.Surface Transform•Post Surface Transform GUI from Surface menu (Surface -> Transform)•Toggle on Fix option for Y Axis and Z Axis and enter -200 in the dX field•Select the Surface created by blend of Part 4 and confirm by clicking on Update Entities•Make a Copy of the surfaces at the other end. It should be as like done for the Ground Plate or the RibThis finishes modeling of the Gap modeling and also modeling of all the surfaces.Now you need to model the curves which will be used to represent the different heat zones of the weld model. For this once again display the IDs of all the nodes.Curves GenerationNodes Transform•Post Nodes Transform GUI from Nodes Menu (Nodes -> Transform)•Select the Node 12 and confirm by middle mouse button on click on Update Entities•In the posted GUI, Fix X and Z axis. Enter -10 in the dY field and toggle on the Copy option•Copy the node by clicking on button Copy•Similarly select the Node 11 and confirm by middle mouse button on click on Update Entities•Fix X and Z axis. Enter 10 in the dY field Copy the node by clicking on Copy•select the Node 9 and confirm by middle mouse button on click on Update Entities•Fix X axis and Y axis, free the Z Axis. Enter 10 in the dZ field Copy the node by clicking on Copy•The new Nodes will have the IDs 13, 14 & 15.Nodes Creation by Node Drop•Post Drop Points/Curves/ Nodes GUI from Nodes menu.(Nodes -> Drop (Project))•With all defaults options, select the Nodes 10, 11, 12, 13 & 14 (all nodes at the Top Edge of the Ground Plate)and confirm by middlemouse button or click on Update Entities•Click on Select Surfaces and pick the bottom surface of the Ground Plate•Make sure that the option is to make a Copy of nodes•Confirm the Copying of the Node by clicking on OK.•Select Nodes 9 & 15 and confirm.•Select the back surface of the Rib to drop the nodes on it as shown in the below picture.•Confirm the Copying of the Node by clicking on OK and close the GUI Node AlignTo make sure that the dropped nodes are on the edge of the face, use align node option•Post Align Nodes/Elem. Edges GUI from Node menu (Node -> Align)•Change option Curve to align•Pick the edge of the surface on which the nodes are lying. It will be highlighted.•Now pick all the nodes on that edge and confirm.•Do the same for all the edges where the nodes are located. This is to insure that the nodes are indeed on the edge.Creating Curve by Sketch•Post Sketch GUI from Curve menu (Curve -> Sketch)•With all the default options pick the pairs of nodes that are original and copied by drop options in the earlier step•See the below picture for the curves to be created in the below picture •Once the pair of nodes is selected confirm by middle mouse button to accept the created Curve.•Make sure that the Curves will be in Part 5Note: To make sure the picked point is on the Node only follow the below procedure.•Pick the first node for the first Curve. It shows the point handle by Curve (a Mark)•Once again click on the same node or the Point handle; it posts a point definition GUI as shown below.•Click on Node in the Snap to option and pick the same node.•This will insure that from here onwards if the point is picked near the node, it will get snapped to the node.Nodes Creation between Points•Fit the model in the w indow by hitting ‘F’ Key•Change the Display Mode by clicking on the icon•Post Between 2 Points GUI from Nodes menu.(Nodes -> Between 2 Points)•Toggle of Nodes at Ends option and enter 1 for Number of Nodes• Pick the nodes 2 & 14 to create Node 23. Similarly create Node 24 and 25.•See the below picture for the nodes to be createdNodes Creation by Transform•Post Node Transform GUI from Nodes menu (Nodes -> Transform)•Fix: Y Axis and Z Axis and keep only option to Copy the nodes in X Axis•Enter -200 in dX field and make sure that the Copy option is on.•Select Nodes 25, 13, 14, 23, 15 and 24 and confirm by middle mouse button. (See the above picture)•Click on Copy and close the GUINode AlignTo make sure that the transformed nodes and the original nodes are onthe edge of the face, use align node option. The procedure has to be followed as earlier.•Post Align Nodes/Elem. Edges GUI from Node menu (Node -> Align) •Change option Curve to align•Pick the edge of the surface on which the nodes are lying. It will be highlighted.•Now pick all the nodes on that edge and confirm.•Do the same for all the edges where the nodes are located. This is to insure that the nodes are indeed on the edge.Creating Curve by Sketch•Post Sketch GUI from Curve menu (Curve -> Sketch)•Change the Part ID to 6 for the new Curves.•With all the default options pick the pairs of nodes that are original and copied by drop options in the earlier step•All the new curves should be parallel to Global X Axis•Once the pair of nodes is selected confirm by middle mouse button to accept the created Curve.Parts ManagementWhen the entities are generated in different parts, the Parts are created with the default name. With the help of Part Manager we need to give proper names to the parts.•Post Part Manager from Assembly Menu or simply by hitting F11•In the NAMES column, click on the default name for the part and change the part name accordingly.See the below Part Manager with the part names to be givenCross check the Explorer for the names of the Parts as entered in the Part ManagerSaving the ModelThe model can be saved in different formats.To save VDB format•In the main menu, click File -> Save as …•Choose the path and the file name as T-Joint.vdb and confirmTo Export the Model in IGES format•In the main menu, click File -> Export…•Choose the path and the file name as T-Joint.igs and confirmThe free nodes that we have in the model were only for the modeling purpose. Thesenodes now can be deleted before saving the modelVisual-MeshV3.0This working document and related know-how herein provided by ESI Group subject to contractual conditions are to remain confidential. The client shall not disclose the documentation and/or related know-how in whole or in part to any third party without the prior written permission of ESI GroupCopyright © ESI Group, 2007. All rights reserved.Prerequisites:Execute the Tutorial 13 and also it is recommended to have familiarity with the basic features of Visual Mesh.Objective:In this tutorial you will learn how to create 1D, 2D & 3D mesh with the use of Surface and Curve using Visual Mesh which should be applicable for Welding JointDescription:The requirement for the weld joint mesh is to have very fine elements at the heat affected zone. And also as the region falls away from the Heat zone, the mesh should get coarsen. There should least number of elements with very fine elements at and near the Filler Material. This makes structured mesh for the weld joint. This tutorial give s the way to mesh a ‘T’ Weld Joint.Outline:Loading Model ............................................................................... 错误!未定义书签。