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Simulating Hydrostatic Pressure in ALE2D Analysis

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Posts: 3
Topic starter
(@alpha0)
Barista
Joined: 5 years ago

Hi all,

I’m performing a 2D water entry analysis of a wedge using the SALE method. Following the examples ( http://ftp.lstc.com/anonymous/outgoing/hao/sale/models/misc/ , sale2d), I built the model, but the simulation aborted with some errors.

1. The first error is related to the keyword *INITIAL_HYDROSTATIC_ALE. I know we need to use a solid set for the ALESID entry in the card in a 3D ALE analysis, but what if there are no solid elements in the 2D plain strain problem? I noticed in the example, CPIDZ in the *ALE_STRUCTURED_MESH card was left empty, and I guess it is the way to create the 2D ALE mesh. I also noticed that the *SMMALE_MESH_SET_SHELL keyword was used in the file mesh_sale.k. I don’t know if it is related to the creation of the “solid set” because I didn’t find this keyword neither in the manual nor in the internet.

2. The second error is very confusing. I specified the ALE2D section to the material parts Air and Water with ALEFORM = 11 and ELFORM = 13 (plain strain), as did in the examples, but a 10380 error arose in the message file which says:

*ALE_MULTI-MATERIAL_GROUP

Element formulation/Element type mis-matched

Part ID 11, Secion ID 11

ELFORM 13, Element type shell.

I checked my model very carefully and really can’t understand why this error would occur.

The keyword files of my model and the afore-mentioned examples have been attached.

4 Replies




Posts: 11
(@charu)
Student
Joined: 5 years ago

Hi,

I cannot see your attached files. can you attach it again?

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3 Replies
(@alpha0)
Joined: 5 years ago

Barista
Posts: 3

@charu

Thanks for the reply. The keyword file of my model has been attached. The example file can be downloaded in the ftp of LSTC (please see the link above).

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(@alpha0)
Joined: 5 years ago

Barista
Posts: 3

@charu

It seems that the file type (.k) is not allowed. I changed the extension from .k to .txt.

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Negative Volume
Admin
(@negativevolume)
Joined: 6 years ago

CEO
Posts: 668

@alpha0

Sorry about that. There is a default file scanner that flags k files. I just tried another fix to allow them through. I will be sure to get this fixed today. 

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