Assignment 2-RADIOSS Engine File Editing & 3D Meshing Challenge
Questions:
1. Check the material properties of the rail component and calculate the speed of sound in steel rail=_______
2. The length of the rail is about 1000 mm.calculate the time takes for a shock wave to travel from one end of the rail to the other.
3.Time for sound to travel length of rail=______
4.Edit the engine file so that the stress wave can be monitored, moving from one end of the rail to the other during impact -this will require a termination time equal to the time it takes for the sound to travel the length of the rail(set on/RUN card)
5.Set the frequency of animation output to a time that will give 20 animation steps(/ANIM/DT)
6.Change /print -10.
7.3d meshing tetra mesh and hex mesh
- Repeat class examples and, maintain the quality.
- Target tet size=5mm,hex size=10mm,tet collapse=0.15.
ANSWER -:
1) Check the material properties of the rail component and calculate the speed of sound in steel rail=_______
Young Modulus E= 210000 Mpa
`rho`= o.oo78 g/mm^3
Speed of sound in speed rail ; c = `root`E/ `rho`
c= `root`210000/0.0078
c= 5188.75m/s
2) The length of the rail is about 1000 mm.calculate the time takes for a shock wave to travel from one end of the rail to the other.
Distance = 1000mm
time taken; t= d/c
t= 1000/5188.75
t= 0.192ms
`3) Time for sound to travel length of rail=0.192 ms
4) .Edit the engine file so that the stress wave can be monitored, moving from one end of the rail to the other during impact -this will require a termination time equal to the time it takes for the sound to travel the length of the rail(set on/RUN card)
5) Set the frequency of animation output to a time that will give 20 animation steps(/ANIM/DT)
6) Change /print -10.
animation steps is 20 then, T frq = t/given animation steps
= 0.192/20
= 0.00963ms
/VERS/120
/RUN/FIRST_RUN/1/
0.1927246447 (Termination time)
/ANIM/VECT/DISP
/ANIM/VECT/VEL
/ANIM/ELEM/EPSP
/ANIM/ELEM/ENER
/ANIM/ELEM/VONM
/ANIM/ELEM/HOURG
/ANIM/DT
0.000000000000000 0.00963623223 (T freq)
/PRINT/-10
/TFILE/0
0.100000000000000
/RFILE
5000
/ANIM/NODA/DMAS
/DT/NODA/0
0.900000000000000 0.000000000000000 
7) 3d meshing tetra mesh and hex mesh
- Repeat class examples and, maintain the quality.
- Target tet size=5mm,hex size=10mm,tet collapse=0.15.
