Bird Strike - Project - 2

Objective- Simulation of bird strike on an aero-engine blade with proper boundary condition and mass scaling.

Procedure-

1- A meshed bird-engine model imported in LS-Pre-post then separate .k file saved for all four-part along with material and section assigned.

2- Another main file has been created with including all these four .k files.

3- Boundry conditions assigned to the model.

4- Control termination and control time step keyword assigned to the model for mass scaling.

5- The model simulated in ls-Run and graph has been plotted.

Steps-

1- Bird file separated from main file and MAT/SECTION keyword has been assigned.

2- This file saved with .k extension.

3- Material card assigned to the bird file as elastic material with proper criteria.

4- Section keyword assigned to the bird file with 2mm shell thickness.

5- Now blade file separated from the main file and saved as a different file with material and section.

6- For the blade part, material already given, we need to include that material keyword and assigned it to the part.

8- We have included the material file in the blade file with the *INCLUDE keyword.

9- Material for blade part.

10- Section for the blade par assigned with 1.2 mm thickness.

12- Hub part also separated from the main file and saved with material and section.

13- Material assigned to the part as elastic material with proper criteria.

14- Section assigned to the hub part as a solid section with element formulation as 4.

15- At last casing past left, we have also assigned with material and section and saved with separated part.

16- Material assigned to the casing part.

17- Section assigned to the casing part.

18- Here we have saved all the files with the main file which going to include all these files.

19- We have included all those files to the main file using *INCLUDE keyword.

20- Initial velocity generation card assigned for the initial velocity to the bird and blade.

21- Here we used an initial velocity generation card because we need angular speed.

22- Velocity for the bird given 20mm/ms.

23- Angular velocity is given to the blade 0.45 rad/ms with NX=1 for the x component.

24- Boundry condition given to the casing as constraining in all directions so that it cant move during the simulation.

25- Contact assigned between bird and blade so that they can not penetrate during impact.

26- Automatic Nodes To Surface contact assigned.

28- DataBase card assigned to the model for output request.

30- Here is the control termination card assigned for run time.

31- We have run the simulation without mass scaling, and we can see that its showing a huge time for simulation.

32- So we have used a control time step card for mass scaling.

33- Used various parameters to assign the card.

34- Now we can see that the simulation time has been dramatically decreased after using mass scaling.

Results-

Simulation result.

Bird strike on engine blade can be seen for a short time of period.

Energy Plots-

Here we can see that the internal is increasing after some time, the time when the bird strikes the blade.\

Kinetic energy decreasing after a collision because it's losing its speed.

And the total energy remains constant because K.E decreasing and I.E increasing, so it's going to balance.

Conclusion-

All the parameter has been assigned to the model along with include keyword, model simulation terminated with no error and all the boundary condition applied to the model along with the keyword. Separate .k file saved for all the parts and included in the main part. Mass scaling has done for the reduction in simulation time. various energy and other graph have been plotted.

Note- Required file attached with this project.