Connect different parts of Automotive Rear door by using suitable connectors

Connect different parts of Automotive Rear door by using suitable connectors

Objective

• Importing NASTRAN Deck file to ANSA environment.
• Setting up the PID according to requirements.
• Making manual connections like RBE2, RBE3.
• Creating automatic connections and realizing the connections.

Procedure

• Click on ANSA icon. It will ask you to choose the working directory and layout to work.
• You can use the performance mode for graphical issue.
• Type (-performance_mode3) to get good results in below window.

• Select ANSA and hit OK.
• Click on Import from NASTRAN deck.
• Go to Import file-à select the NASTRAN deck and hit Import.

• It will appears as a shaded view in Entity mode. On left side it will shows the database.
• Database include some important tabs like properties and material.

• When you fine all the areas you will get the exact idea about how the surface looks. As shown below.

• Now we have to look at the model summary given.
• Here if needed we have to set the PID according to the section.

Identify the connections required

• We have to make sure which type of connection we have to deploy as per given CAD data.
• Sometimes the connection data is provided.
• There are different types of connections are possible in any assembly, such as spot weld, seam weld,

Bolt connections etc

Creating a RBE2 Connection

• In RBE 2 two different method included namely Many nodes and Two Nodes. Choose the suitable conditions according to the requirement.
• Selection of node is have different methods such as feature angle selection, loop selection, path selection etc.
• Apart from node we can select the elements for choosing different nodes.
• Select the required node and hit the middle mouse button to accept.

Creating a RBE2 Cluster Connection

• The RBE 2 cluster is mainly created using two different parts together.
• The nodes from two different parts are joined together to form a rigid connection.
• The RBE2 consist of the two types of nodes namely slave node and master node.
• The master node gets created at the COG of all the nodes.
• The DOF can be restricted during the entity creation.

Creating a Bolt Connection automatically

• The bolt connection can be created manually or automatically.
• In manual method we have to create the two different RBE2 link (as representation of bolt and nut) and join it by another RBE2 (Bolt Stem).
• In automatic method we have to only specify a center point and the ANSA will create the bolt itself.
• For creating a point, we have to create a 3D point in topo mode.
• This point is converted to bolt directly using the connection manager.
• We have to realize the bolt by providing the details regarding the joining point, search distance, and type of bolt required.
• Here in automatic bolt realization the each RBE2 work as a separated connection and the bolt stem generation is also automatic. This will save the time during connections.

Creating a Bush Connection

• Here the bush is required to create between the window glass and other parts such as inner and outer extract of the door.
• The bush connection will represent the weather strip also known as beeds.
• These connections have the stiffness coefficient.
• The bush connection require the separate PID to choose between two different parts.
• The search distance will be provided accordingly.
• The Type of joint is RBE3CBUSH should be selected when asked in connection manager.

All parts having different connection together

Conclusion:

1. Connectors are required to connect to different components, as in actual work environment.
2. If we want to delete the connector we should delete it with its FE files or it may create some issue.
3. There are various types of connectors are available according to conditions given in CAD model.
4. Connectors should be chosen wisely to get good results.
5. Connector during creation can spoil the mesh flow, so we have to pay attention to the mesh flow after connector creation.