Anyone recognize this FEA solver language?
Anyone recognize this FEA solver language?
(OP)
Hello,
I am a stress analyst working in the aerospace field. I am trying to recreate an old FEA using an input deck from the early 1990s, but am unfamiliar with the language. NASTRAN is the solver I use daily. I can't share the actual file, but below is an example of the deck with random values and skipped lines. So far I've been able to decipher that this file will create an FE Model consisting of various nodes, materials, and then use some "CONNECT" function to create a bar or quad element, as well as properties for these elements.
What I'm trying to understand is the BEAM card (highlighted below) and what each entry on the line means. I assume the first entry, "1", means material ID 1. I know 0.5 is the area of the section and 0.1 and 0.3 are the Ixx and Iyy of the section (I know the section geometry). What I don't know are the "0" entries and also why 0.5 shows up two more times in the 6th and 7th entries. Is anybody who's familiar with this type of solver able to tell me what exactly the entries in the BEAM card consist of AND/OR what solver language this is?
Thanks in advance!
Mystery Code:
TITLE MSC/mod
NODAL POINT LOCATIONS
1 0.0 2. 0.0
2 0.0 4. 0.0
3 0.0 6. 0.0
4 0.0 8. 0.0
.
.
.
.
.
--BLANK LINE--
MATERIAL 10000000 0 0.0003 .3 0 0 0
BEAM 1 .5 0 .1 .03 .5 .5 0
CONNECT 1 TO 2
CONNECT 2 TO 3
CONNECT 3 TO 4
.
.
.
QUAD 1 1 .5 0.0002
CONNECT 1 TO 2 TO 3 TO 4
.
.
.
END DEFINITION
I am a stress analyst working in the aerospace field. I am trying to recreate an old FEA using an input deck from the early 1990s, but am unfamiliar with the language. NASTRAN is the solver I use daily. I can't share the actual file, but below is an example of the deck with random values and skipped lines. So far I've been able to decipher that this file will create an FE Model consisting of various nodes, materials, and then use some "CONNECT" function to create a bar or quad element, as well as properties for these elements.
What I'm trying to understand is the BEAM card (highlighted below) and what each entry on the line means. I assume the first entry, "1", means material ID 1. I know 0.5 is the area of the section and 0.1 and 0.3 are the Ixx and Iyy of the section (I know the section geometry). What I don't know are the "0" entries and also why 0.5 shows up two more times in the 6th and 7th entries. Is anybody who's familiar with this type of solver able to tell me what exactly the entries in the BEAM card consist of AND/OR what solver language this is?
Thanks in advance!
Mystery Code:
TITLE MSC/mod
NODAL POINT LOCATIONS
1 0.0 2. 0.0
2 0.0 4. 0.0
3 0.0 6. 0.0
4 0.0 8. 0.0
.
.
.
.
.
--BLANK LINE--
MATERIAL 10000000 0 0.0003 .3 0 0 0
BEAM 1 .5 0 .1 .03 .5 .5 0
CONNECT 1 TO 2
CONNECT 2 TO 3
CONNECT 3 TO 4
.
.
.
QUAD 1 1 .5 0.0002
CONNECT 1 TO 2 TO 3 TO 4
.
.
.
END DEFINITION
RE: Anyone recognize this FEA solver language?
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm
RE: Anyone recognize this FEA solver language?
I'd guess it means connect node 1 to node 2 using the defined beam element property. but it makes assumptions about beam orientation.
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Anyone recognize this FEA solver language?
BEAM
1 = you said material ID
.5 = you said section area
0 = since this is an integer, it may be a code to turn on or off certain options
.1 = you said section Ixx
.03 = you said section Iyy
.5 = possibly Ixy or J?
.5 = possibly J or Ixy?
0 = since this is an integer, it may be a code to turn on or off certain options
I base these guesses on filling out the section properties, for which there are in general more than just Ixx and Iyy. Try calculating Ixy and J for your section to see if the values are 0.5
Other than that, they could be any number of things: offsets, stress recovery points, pin flags, transverse shear factors, etc...
RE: Anyone recognize this FEA solver language?
RE: Anyone recognize this FEA solver language?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Anyone recognize this FEA solver language?
You can view a copy on the Internet Archive if you create an account:
https://archive.org/details/finiteelementapp00pott
I pulled out a few pages and put in the attached pdf file.
RE: Anyone recognize this FEA solver language?
RE: Anyone recognize this FEA solver language?
Mark.