Bird Strike - Project - 2
Bird Strike - Project - 2
Aim:
To solve the given BIRD STRIKE model as per the given condition.
procedure;
1. Save a separate part .igs file for a given model.
2. Renumbering all files as per below.
Part ID Node ID Element ID part set ID
Bird 1001-1001 100001-100413 500001-500410 10001-10001
Blade 2002-2002 200001-206259 600001-605473 20002-20002
HUB 3003-3003 300001-303983 700001-720844 30003-30003
Casing 4004-4004 400001-404097 800001-803968 40004-40004
Mat_Casing=103
Mat_ Bird=104
Mat_ Blade_hub=102
Section_ shell=1
BIRD-Shell_2
Solid_3
|
MASS |
LENGTH |
TIME |
FORCE |
STRESS |
ENERGY |
DENSITY |
YOUNG's |
35MPH |
GRAVITY |
|
kg |
mm |
ms |
kN |
GPa |
kN-mm |
7.83e-06 |
2.07e+02 |
15.65 |
9.806e-03 |
3. create a separate file for all cards as per below.
SECTION:
shell
Solid
4.MAT_ELASTIC
MAT_PIECEWISE_LINEAR_PLASTICITY
5.INITIAL_VELOCITY_GENERATION
Hear the bird flying to x direction 5 mm/ms
Hear blad and hub rotating 0.2 rad/ms
6.CONTROL_TERMINATION
7.CONTACT_SURFACE_TO_SURFACE
CONTACT_TIED_NODES_TO_SURFACE
8.BOUNDARY_SPC_SET
9. DATABASE
10. Open a new file and INCLUDE_INCLUDE all the above-created files.
11. save the included file separately as a new name main.igs.
12. open a new LS Dyna file and open the main.igs file. Run ls dyna.
- if the DT2MS value is -0.0001, the running time is 1h30min value of adding mass percentage is 2.5.so we reduce the running time to 10min. but the mass-adding percentage is increased to 50%.
PREWORK
For steel: MAT_001 Elastic
Density = 7.8e-6 kg/mm3 E = 200 kg/mm.ms2 PR = 0.3
For ABS plastic:
Density = 1.1e-6 kg/mm3 E = 2 kg/mm.ms2 PR = 0.3
For blades, the material model included the elastoplastic material as Aluminium with the following properties:
Density = 2.71e-6 kg/mm3 E = 68.948 kg/mm.ms2 PR = 0.3
Blade speed= 2000 rpm
Angular velocity of Blade 1 RMP = 0.10472 rad/s
So,2000*0.10472=210 rad/s=0.2mm/ms
Bird flying speed=20kph= 5mm/ms