Assignment 2-RADIOSS Engine File Editing & 3D Meshing Challenge

1) Speed ofsound in Steel rail, c = 5188.74mm/ms

2) Time taken for a shockwave to travel ,del t =l\c = 0.192ms

3)Time for sound = 0.192ms

4)The engine file is edited in the given engine output file

5)Frequency = total time \20 = 0.0095

6) /print- 10

7)3d meshing and hexa mesh procedure is explained below

OBJECTIVE:

3d meshing - tetra mesh

AIM:

To do 3d mesh to the given component.

Procedure:

1) Open the model directly since it is in .hm format.

2)Check for any geometrical error, in this case we dont have any so carry on with 2d mesh first.

3)Mesh the each components according to the given quality criteria with tria elements.

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4)Now we have to convert the 2d mesh element to tetra elements by 3d>tetramesh select the elements and mesh with required tet collapse value.

5)Do the same to the other components and make sure no tet collpase errors should be present.

OBJECTIVE:

Hexa mesh for arm bracket

Steps for 3D hexa mesh 0f arm bracket model:

• In this model we have four components , one by one we will be meshing the model
• We have different methods to perform 3d hexa mesh like Element offset, spin,Linear solid, solid map...etc

• We will be using these methods to perfrom hexa mesh on each component, depending upon the components geometry
• Firstly the base , it is just a rectangular cube it is better to mesh the top surface with only quad element and use element offset option

Next component is curved arm, to mesh this model select the common 2d element between base and arm curve component , spin the element using base node and axis to rotate

• To mesh the arm straight component , use 3d>linear solid option
• We should mesh each end by 2d element and join the same in this method
• Already one end of arm stright component is meshed by hexa element , to extract 2d element from hexa element , go to tools>faces extract faces option
• One end of the component will have 2d elements, mesh the other end with same number of elements to avoid penta elements

• To mesh the boss component we will be using Solid map option
• Mesh the boss one side and solid map the element to the ither end by nodes
• Now after meshing all the components by hexa elements we have to delete all the 2d elements present in the model
• Go to delete option select elements by config option and slect quad 4 element, now all the 2 element will be deleted

CONCLUSION:

• Understood how to calculate speed of sound in different material, frequency, time step
• Understood how to read input radioss file
• Understood how import the radioss solver deck file anf feed the value
• Understood how to export the file in .rad format
• Got to know how to create 3d tetra mesh and hexa mesh
• Learnt how to give diffrent type of 1D connection and hyperbeam concept