BIRD STRIKE ON COMPOSITE FAN BLADE

Altair Forum User

i'm trying to do analysis of impact in composite fan blade (leading edge in titanium). I use radioss with matcompsh_25 and Propstack_17. When i try to launch the analysis the following errors appear. can you help me resolve them ? Thanks

 

ERROR ID :          286
** ERROR IN INPUT CONSISTENCY
DESCRIPTION :
   QUAD ARE NOT COMPATIBLE WITH N2D3D=0
 .. UNITS SYSTEM
 .. MATERIALS

ERROR ID :          198
** INPUT ERROR IN MATERIAL LAW 25
DESCRIPTION :
   -- MATERIAL ID : 1
   -- MATERIAL TITLE : composito carbonio
   SIGYT1 IS LESS THAN ZERO

ERROR ID :           30
** ERROR IN COMPOSITE SHELL DEFINITION
DESCRIPTION :
   -- PROPERTY ID : 0
   -- PROPERTY TITLE : 

-- MATERIAL ID : 0
      -- MATERIAL TITLE : 0
      LAW 0 IS NOT COMPATIBLE WITH THIS PROPERTY
SOLUTION :
   COMPATIBILITY WITH MATERIAL LAWS 25, 27, 36, 60 AND USER LAWS
 .. 2D SOLID ELEMENTS
 .. 3D SHELL ELEMENTS
 .. 3D TRIANGULAR SHELL ELEMENTS
 .. SPH PARTICLES DEFINITION
 .. SUBSETS
 .. ELEMENT GROUPS

ERROR ID :           70
** ERROR IN QUAD ELEMENT GROUP
DESCRIPTION :
   -- GROUP ID :    3
   -- GROUP TITLE : ply3
   ELEMENT ID=166 DOES NOT EXIST

 

 

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi,

 

Looks like property and material is not assigned component(s).

 

Can you please check and update the same if they are not assigned on component?

Altair Forum User

hi Prakash, thank for the reply. I assigned at all components his material and property as you can see in the pictures.

I created pstack_17 than i assigned at blade, after that i created ply and laminate. other components are the Leading edge in titanium (matlaw2) and bird (sph). 

for the project a learnt the tutorial 'bird strike on wing' . 

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

HI,

 

There are multiple errors which point to zero thickness on property ID =0 which doesn't exist, duplication of ply elements, etc...

 

If possible, please share the model file with us using the file transfer link in my signature below.

Altair Forum User

Hi, i have sent the file you required. i hope you can help me to solve these problems becouse i'm stacked here and i can t go ahead with this analisys.

Altair Forum User

Hi @nicola.andreini

 

There are multiple errors,

 

PLY Card is updated for plies and few components are missing PART card image

 

Also, I would suggest you create plies with elements instead of shell.

 

I will share the modified file. Please check the model before you run as I accidentally modified few elements.

 

 

 

Altair Forum User

thanks a lot for the model, i try to lanch the analisys and this is the result. i think the solver looped. 

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

HI,

 

I ran the same file which I shared with you and runs without any error,

 

Anyways, I shared .rad files with you. Please run the same and check if it runs without errors. 

Altair Forum User

Hi, your files .rad run without problems. In my radioss 2017 the model you sent yesterday doesn't run (give me the same error i posted in last pictures). Tanks, your help is very useful 

Altair Forum User

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Altair Forum User

hi Prakash, i have a question:  can you explain me the meaning of this changes ?  (ply grsh3n, ply 1.24...) 

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

@nicola.andreini

 

I don't remember, but I think I modified the ply shape using elements.

Altair Forum User

hi Prakash, i extend my model to all fan blades and i solve old problems (the analysis in a single blade run without error). when i lounch the analysis this problem come out. can you help me to solve it ? (how can impose rotational velocity to fan blades ?) 

<?xml version="1.0" encoding="UTF-8"?>

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi,

 

Can you please share the complete .out file?

Altair Forum User

yes, i send you the file at your trasfer link , thanks a lot. 

Altair Forum User

HI,

 

I had a look at your file.

 

You have provided INIV in Engine but no nodes are provided. Please check this.

 

Also, please remove rigid from TH/PART as no part image is provided for the same. 

 

From Engine, please remove ANIM/ELEM/FAIL. Some entities are not supported and this may lead to another error. 

 

 

Altair Forum User

Thank you Prakash, i change rigid with constraints apply to blade's nodes (if a use cylindrical system is correct secure dof 156 r, t, z?), now the analysis run with 2 warnings but i can't impose angular velocity to fan blades. 

Altair Forum User

HI,

 

Sorry, but I didn't understand what you mean by ' cant impose angular velocity' 

 

Can you please explain?

Altair Forum User

also, I noticed that the movement of the bird is moving away from blades. You need to change the direction of initial velocity applied on Bird component. 

Altair Forum User

Sorry Prakash, i need to create constant angular velocity for fan blades (314 rad/s) . I did it from utility/bcsmanager/imposed velocity/select curve but this method didn't work. I change the velocity thanks 

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi,

 

Try to apply IMPVEL with a SKEW and apply on the master node,

 

The distance between the bird and the blades are too far. Reduce the distance, calculate the velocity accordingly to reduce the simulation time 

 

 

Altair Forum User

thank you Prakash