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  • How to alter the .bdf to change contact settings from Glued to touching.

    Hello, I have an assembly with 4 parts, and I need to swap 2 of the 3 contact settings from glued to touching with a friction coefficient of 0.05. Bodies 1, 2 , and 3 should be touching, while bodies 3 and 4 should be glued. I'm looking through the nastran…

  • Linear Contact

    I'm trying to figure out a linear contact problem in SOL101. My model is a structure where some constraints are allowed to move up to a limit, after which they react like they have a linear spring applied to them. My solution cannot be in SOL400 due to…

  • I have lift fixture supported by cables that I want to evaluate for loads in different configurations.

    I attempted to use CROD elements to represent the cables although the solution produces garbage results under linear static and wont converge at all under nonlinear solution. Are there good methods for representing cables in NASTRAN?

  • Different Results from PC and High Performance Computer

    I have made an Nastran input File and run this on Nastran on my PC and on an High Performace Computer. It was an modal analysis (SOL103). The first six Eigenvalues are different. What could be the reason for different Outputs while using the same Input…

  • How can I model Bolt pretension using SOL 101 in Bolts represented as two RBE2 spiders and one CBAR element in between?

    How can I model Bolt pretension using SOL 101 in Bolts represented as two RBE2 spiders and one CBAR element in between?

  • Damping SOL109

    Damping SOL109

  • solid to shell connection

    solid to shell connection

  • ROUTINE ALLOC: FRICTION IS NOT SUPPORTED IN SMP MODE.

    Hi folks. I'm trying to run a nonlinear ( SOL400 ) model with Segment-to-Segment contact . I defined friction in my model as FTYPE = 6 on BCPARA and FRIC = 0.1 on BCONPRP, but when I submit my model for a Nastran run, the following warning shows up: ROUTINE…

  • I ran a contact analysis with Nastran s400. there are the fatal as shown below. Attached is f06, f04, the log file for review. f06 is so big that last a few pages were left. Please kindly check this.

    *** USER INFORMATION MESSAGE 4114 (OUTPX2) DATA BLOCK OES1X1 WRITTEN ON FORTRAN UNIT 12 IN BINARY (LTLEND) FORMAT USING NDDL DESCRIPTION FOR OES1X1, TRL = 101 Attached Files (3) 777.f06.txt 77.f04.zip 77.log

  • GPSTRESS definition

    GPSTRESS definition

  • SOL 400 TSTEPNL & GPFORCE

    Hi All, My SOL 400 Transient solution doesn't give GPFORCE output. Can you please help share your input? Exact same setup for SOL 109 does give GPFORCE output as expected. Thanks, and regards, Amit

  • Different Epsilon and Results on i4 and i8.

    Hi, We and our suppliers have solves a SOL101 and so far the results always matched. But found out recently difference in Epsilon values and that the reason was i4 and i8. So the question is which solution has to be considered accurate…

  • For Nastran SOL 400 how can I tell what KMETHOD I'm using when it is AUTO, is there anything in the output, f06, etc, or any debug output I can see it?

    For Nastran SOL 400 how can I tell what KMETHOD I'm using when it is AUTO, is there anything in the output, f06, etc, or any debug output I can see it?

  • For NASTAN Sol 400, I'm trying to force a solution even when it doesn't converge without changing the errors PWU. On NLPARM, I set NINC =3, MAXITER=3, MAXBIS=0, MAXDIV=100, so on the first step 0.333 it doesnt converge after 3 iterations, can'

    ...can't bisect, then gets acceptables solution 'BEST ATTAINABLE SOLUTION', then goes to 0.6667, doesnt converge after 3 iterations, then stops with fatal error doesn't converge. Why didn't it continue? I though this would force it. The kmethod was AUTO…

  • Thermal Stress Analysis with SOL 101

    Hello, I'm trying to do a thermal stress analysis with SOL 101. The question is, do i have to define a Initial Temperature "TEMP(INITIAL)" for all the grid points in the model and then define TEMP(LOAD) for the points where a thermal load is…

  • Random loads (PSD) + Static Loads (inertial acceleration)

    Hello, I'm concerning with Random analysis using either MSC Random Tool either Nastran. I have a PSD table (Hz vs g^2/Hz) on wich I need to superimpose a static load expressed in g. So I have a random "load" plus a static load, how can…

  • Are there any known issues running Nastran (application and data) from a Lustre filesystem?

    We have recently switched our main, shared storage platform to a Lustre filesystem-based disk array and, since doing so Nastran jobs appear to have increased in time to complete and occasionally hang entirely (only to work fine on a re-run). Reports…

  • USER FATAL MESSAGE 1250 (BIOWRT) No space left on device (errno = 28)

    *** USER FATAL MESSAGE 1250 (BIOWRT) STATUS = 28, FILX = 5, LOGNAME = SCR300 , NSBUF3 = 65536 FILE = /scratch/system/D200131_XLR-KB_FE_DFEM_MODEL_MR_v5.T8595_10.SCR300 BLKNBR = 573571 ERROR MESSAGE IS -- No space left on device…

  • Is there a max scratch disk size limit (set by some parameter) or is it simply the available unused space on the target scratch drive?

    I'm running a large sol 111 for a random response analysis (nastran+patran). Windows 10 os. solve=auto I'm getting the fatal msg 1250 (BIOWRT) and the msg "There is not enough space on the disk. The culprit appears to be the scratch…

  • I have a Problem with SOL112. For excitation I use an Impulse but I don't have SPCs in my model. Since we work with rigid Body modes my part 'flies' through space. Is there a possibility to disable rigid Body modes like PARAM,INREL,-2 in static

    I have a Problem with SOL112. For excitation I use an Impulse but I don't have SPCs in my model. Since we work with rigid Body modes my part 'flies' through space. Is there a possibility to disable rigid Body modes like PARAM,INREL,-2 in static analysis…

  • Hi, I'd like to calculate pfmodes in a SOL111. To identify the modes afterwards, I need the results of the modal analysis that's done in the first step. Is there a way to Output the results of the modal analysis and the pfmodes from one Simulation

    Hi, I'd like to calculate pfmodes in a SOL111. To identify the modes afterwards, I need the results of the modal analysis that's done in the first step. Is there a way to Output the results of the modal analysis and the pfmodes from one Simulation…

  • Local Peek stress using Contact Analysis for bolted joint Structure

    Hello I am performing the contact analysis using SOl400 to check the max. stress causing due to temperature dependency and point loads. The model consists of three components which are bolted together. Meshed with hexagonal elements and…

  • PARAM CARD FOR CBEND AND PBND examples

    PARAM CARD FOR CBEND AND PBND examples

  • Fatal message 6352 Same model ran on 2013, but on versions 2017 and 21019 this problem exists.

    *** USER WARNING MESSAGE 285 (DML) FATAL ERRORS WERE FOUND WHILE READING THIS BEGIN SECTION MODEL SUMMARY DOES NOT INCLUDE COUNT OF FATAL ENTITIES ^^^ ^^^ >>> IFP OPERATIONS COMPLETE <<< ^^^ *** SYSTEM FATAL MESSAGE 6352…

  • SFAM 9160

    Running SOL111 for Structural output in NAS2019.1 with ACMS leads to job abort with ^ *** SYSTEM FATAL MESSAGE 9160 (SUBDMAP MDACMS) PROBLEM ENCOUNTERED IN CALCULATING DOMAINSOLVER ACMS DOMAIN MODES. USER ACTION: IF LARGE MASS IS…
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