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

RADIOSS Engine File Editing & 3D Meshing Challenge

Objective:

• To calculate the speed of sound in steel rail
• To calculate time taken for shock wave to cross the rail of 1000mm
• To edit the engine file so that the stress wave can be monitored, moving from one end of the rail to the other during impact.
• To set the frequency of animation output to a time that will give 20 animation
• To set the N_print value as -10
• To perform 3D meshing on the given components with given quality parameters.

Procedures:

• To calculate the speed of sound in steel rail

Formula for "Speed of sound" C = √E/ρ

the given 0000.rad file we can get the material properties of steel rail as shown in figure:1

Figure 1: 0000.rad file

the value of

E = 210000 Mpa(N/mm^2)

ρ = 0.0078 g/mm^3

C = √210000/0.0078

= 5188.75 m/s

2) Calculate time taken for shock wave to cross the rail of 1000mm

Formula for time taken ( t ) = l/c

t = 1/5188.75

= 0.1927ms(milli seconds)

3) Time for sound to travel length of rail = 0.1927ms

4) To edit the engine file

The engine file edited according to the calculated values, its shown in Figure 2.

Figure 2: Engine File Edit

5) To set the frequency of animation output to a time that will give 20 animation

Frequency = (l/c)*time

= (1/0.1927)*20

= 104 Hz

Frequency of animation output file edited according to the calculated values, its shown in Figure 3.

Figure 3: Edited 0001.rad file (frequency)

6) To set the N_print value as -10

File edited according to set N_print value, its shown in Figure 4.

Figure 4: Edited 0001.rad file (N_print)

After changing all the values Export the solver deck file in .rad format as shown in Figure 5.

Figure 5: After Editing 0001.rad file

Model 2:

Geometry Import

The Housing Component is imported. The model is next checked for any missing surfaces or triple cons. The imported component is shown in Figure 6.

Figure 6: Imported Housing Component

Meshing

Delete the solids on the model and with the model surface create a 2-D mesh by

Command : 2D+ automesh+ surface+ tria-element+ mesh.

Convert 2D tria mesh in to 3D tetra mesh by

Command : 3D + tetramesh+ select the element+ mesh

3D Tetra meshed component is shown in figure 7,& 8.

Figure 7: Meshed Inner housing model

Figure 8: Meshed outer housing model

Model 3:

Geometry Import

The arm bracket Component is imported. The model is next checked for any missing surfaces or triple cons. The imported component is shown in Figure 9.

Figure 9: Imported arm bracket Component

Meshing

Meshed component is shown Figure 10.

Figure 8: Hexa Meshed arm bracket Component

CONCLUSION:

• Recognised the methods for calculating the speed of sound in various materials, frequencies, and time steps.
• a working knowledge of input radioss file read
• Recognised how to supply the value and import the radioss solver deck file
• Recognised the.rad file export process.
• learned how to make 3D hexa and tetra meshes.
• learned how to present several types of 1D connections and the notion of hyperbeam