Bird Strike - Project - 2

AIM

Bird Strike on Aeroplane Turbine

OBJECTIVE

• Re-numbering the FEM parts
• Assigning all FEM parts to separate file.
• Assigning all the necessary keywords into separate file.

PROCEDURE

1. Re-numbering different FEM models into different file.

According to the question all the fem models have to renumbered nodes, elements and parts.

Renumber <

Nodes = 100000+

Elements = 500000+

Parts = 1000+

Similarly other fem models have to renumbered.

Casing

Nodes = 1200000

Elements = 600000

Parts = 1200

Blades

Nodes = 1500000

Elements = 800000

Parts = 1500

Hub

Nodes = 1800000

Elements = 1000000

Parts = 1800

Bird

Nodes = 2000000

Elements = 1200000

Parts = 2000

2. Creating Section cards

SHELL section is defined for Bird, Blade & casing and SOLID section for Hub. This section is saved in separate file.

Model < Keyword < Section <Shell

Model < Keyword < Section < Solid

This solid section has Element formulation as 4.

3. Creating Material Cards

Material of Blade is defined and Bird, Casing & Hub is Elastic material.

Model < Keyword < Mat < Elastic

4. Assigning parts

The MID & SECID is noted down and parts are assigned on their respective parts file.

Model < Keywords < Parts

5. Creating Boundary Condition Cards

All Boundary conditions are defined on separate file. First SPC is created for casing Constrained.

Model < Keyword < Boundary < SPC

Since the velocity of Blade is constant so initial velocity generation card is created for blade as well as bird.

Model < Keyword < Initial < Velocity generation

Angular velocity is 1 rad/ms

Bird motion is 100mm/ms

6. Creating Controls Cards

Termination card is defined for end time of simulation.

Model < Keyword < Control < Termination

Hourglass is also defined.

Model < Keyword < Control < Hourglass

7. Creating Contact cards

Automatic Surface to surface contact is defined between Bird and Blades.

Model < Keyword < Contact < Automatic Surface to Surface

Tied Shell to edge to Surface contact is defined between Hub and Blade.

Model < Keyword < Contact < Tied Shell Edge to Surface

8. Creating Database

ASCII and D3PLOT is defined.

Model < Keyword < Database < ASCII

Model < Keyword < Database < Binary D3plot

9. Attaching all files in one main file

Model < Keyword < Include < Include

10. Save file

After including all the parts and keywords file.

File < Save As < Save Keyword As

11. Simulation

RESULTS

Von mises stress plot.

Effective Plastic strain plot

Stress vs Strain plot

Energy plot

CONCLUSION

The Bird strike simulation was done with the help of shell and solid element using explicit method.

FUTURE

The future approach can be done by increasing the velocity and modifying positions.