Week 6 - Creating connection for Rear door

Aim: To Prepare Given FE model for Connections using NASTRAN DECK-ANSA V20.14

Connections Procedure Includes :

1.Assign Different PID's for Given FE Door Model

Before PID's Assign:

After PID's Assigned:

2.Connection Of Bolted Regions:

Connection between Hinges and Door Area

a-Create 3D Point Using ONCog Tool by selecting Edges of Middle PID hole region

Tool Location:TOPO Deck->Points->OnCog

b-Now Convert 3D Point into Bolt using Convert Option

Procedure Includes:Convert->3D Point->Select Point by Left Mouse Click(LMC)->Confirm

c- Now to Deploy Connection of bolt i use Connection Option

Procedure Includes:Connection->Select Bolt Point->Confirm->Assign PID 1,2&3 for connections->FE Rep Type-BOLT->provide required values ->Apply->Realize

Bolt Connection Tab Overview:

d-Connection of BOLT is Deployed Mentioned Below:

e-Repeat same process for Remaining Bolted Regions

3.Connection Between Hinge and Car Body:

-First Deploy Connecion for free holes using RBE2-Many Nodes Option

-Now Deploy 2Node Cluster Using RBE2-Two nodes option w.r.t 5Degree of Freedom because there should be a free rotional z-axis to open the door

-Repeat process for other Regions

4.Connection of Two Holes using RBE2 Cluster-many Nodes:

-To Deploy connection of Holes between two faces i use RBE2 Cluster-many Nodes Option

Location of Tool-NASTRAN DECK->ELEMENTS->RBE2-many node ->select elements ->Confirm

some of the Screenshots of RBE2-many node Connections are Mentioned below

5.Connection of Faces using RBE2 Cluster-many Nodes:

-Every Body Should be Connected properly before going for simulation

-when a body is having Geometrical errors and it doesn't have holes to give connection with other face it should be connected using FE Elements

-Procedure Includes

***select RBE2-many nodes option and select FE Elements of Both Faces and Confirm

-After RBE2 Element connection mentioned below

6.Spot Weld Connection:

-Creat 3D Point by using ONCog Option in between Elements where spot weld is needed

-Convert 3D Point to Spot Weld Using Convert Option

**Convert->3D Point->Select Point by LMC->Confirm

-Now To make Connection

**Connection Option->Assign PID's->Select RBE3-HEXA-RBE3 in FE rep type->Enter Search Dist->Assign PSOLID ID(Create If needed)->Apply->Analyze

Result Mentioned Below

-An Hexa will be Created like that to Represent that it is Spot Weld

-Repeat the process for the remaining areas if required

7.CBUSH Connection in Mirror Region:

-To Deploy Cbush Connections First Create Curve of Edges by using Feat2Curve Option

Tool Location-Mesh Deck->Perimeters->Feat2Curve->Select Edges->Confirm

-Convert this Curve into Spot Line Using Convert->Curves->Select Curve->Confirm

-This Connection should be on Both side Because Mirror is Fixed from all areas

-To Ensure Proper connection of mirror on both sides i use transform(copy) the spot line curve with respect to y-axis at distance of 10

-Now to create Cbush Connection select connection option ->select spot line->confirm---a connection tab will be pop up

-Now Give Distance value of 10 and assign 2PID's and select RBE3-CBUSH-RBE3 option in FE rep type->Give Search Distance of 50 -> check "Keep all Branches option"

->Assign PSOLID PID->Apply ->Realize

Results are Mentioned Below

8.Connection of Door Handle:

-Create RBE2 Cluster using RBE2 Many Nodes on Door Handle Connections

-Create 2node RBE2 Cluster between connections

-one point will be auto created in between two node connections

-now we need to assign The Mass on Handle Region

-To Assign Mass Click on INFO tab Located at NASTRAN->ELEMENTS->INFO

-A CONM2 Tab will popup Mentioned Below

-Assign Value of Mass(Should be in Tonne)

9.Save .ANSA File

Learning OutComes:

-Learned How to Prepare Model For Simulation by Providing Different Connections at Different Areas.

Conclusion:

After Completion of This Challange I can Perform Connections to any Complex Model.