Assignment 2-RADIOSS Engine File Editing & 3D Meshing Challenge
AIM: To get a 3D meshing to a given various component and the meshing involves i it to be a tetra mesh and a hexa mesh.
PROCEDURE
1 st ans:
The material property of steel having density(RHO)=0.0078gm/mm^3=7800kg/m^3 as per the data given in the RAD file of 0000 file .
the speed of the souund(C)=sqrt of(E/RHO) where E=Young's modulus=210GPa(given)
C=5188.74m/s=5188.74mm/ms.
2nd ans:
Time Taken(T)=L/C where, L=1000mm=.1m
T=1/5188.74=0.0000192725 sec=.0192725ms
3rd ans:
T=0.0192725ms
4 th ans:
hypermesh file is opened and imported the engine file
Go to view-Browser- Hypermesh -solver-Run- Engine Run
changed the time stop to 60
5th ans:the frequency of animation output is set at a time gives 20 animation step
Frequency(f)=Time Taken/no. of animation steps=60/20
change in freq=40
went to Engine keyboard-Anim-Anim/DT-Eng Anim/DT
set Tfeq 40
7th ans:3D meshing hex mesh 10
taken the base part , hide the reamaining parts
mesh the component
selected 2d mesh,select auto mesh where element size is 10
from 2d mesh generate the surface
selected 3d page-solid map-line drag-select the element-line drag-set element size 10
went to the component select the arm curve ,make it as current comonent.
Press F4-3 odes-select the curve-create a node at centre of curve.To mesh the curve, go to 3Dpage-spin-select the element-center node-drag line-selectangle-keepelement size 10.went to tool page-face-select the armc urvecomponent-assigned tolerance value -found face
In order to mesh arm straight,meshed the front face of it with same no.of element placed in arm curve. went to 3dpages -solid map-source element -destination element-same3nodesforboth the faces of direction N1,N2,N3.
Like previous step I have generated facefor arm structure in next steps.
In order to mesh the boss I have created some nodes in boss component. Went to 3Dpage-solid map-deselect source geometry-destination geometry-select mixed in along geometry-element drag,makesure the element size is 10.
Pressed shift+F11- selected the solid map component-moved to boss component.
3Dmeshing tetra mesh
Coming to next component, to check view 3d topology
2d pages-auto mesh-select surface-element size as 5 -mesh types as trias-click mesh
Next moved to 3D page -tetramesh -select the component -moved the tetra parameter-select the min tetra size 5- again moved to tetramesh- meshed the selected component.
F5mask option-after tetra mesh I have check whether it done properlyy , after the unmask the component.
Checked the quality of te element , F10-3d-tocheck tet collapse- these component is meshed with zero error.
same procedure is done for hub component.
2d pages-auto mesh-select surface-element size as 5-mesh types astrias-clicked mesh
Then went to 3d page-tetra mesh-select the component-move the tetra parameter-select the min tetra size as 5-again moved to tetra mesh-meshed the selected component.
Checked the quality of te element , F10-3d-to check tet collapse- 27 elements are failed -saved the failed element.
move mask -element -reterive-mask-reverse-failed element are visible.
go to shift+F2- nodes-displaced-addnods,it will help to identify the failed element. Selected the element and remeshed it.
go to mask-unmask the element, the component is meshed completely with zero element failure.