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    • HIRENASD Beam FEM

    Metadata Updated: April 11, 2025

    This contains attempts to create BEAM FEM model.

    I have started a Blog to discuss this... please put your comments there and I will attempt to keep everything updated. Correspondence between A.B. and CDW is provided to assist in developing NASTRAN Beam FEM
    (through July 1)(PDF)

    The original data provided by Alexander is shown in model_input-extract.txt

    Additional files loaded July 21, 2011:

  • Comparison of Wing Masses, and Lengths, and Mass calculated from provided densities, and lengths
  • Comparison of Model Masses and frequencies
  • Emails dealing with offsets for bending and center of mass (between Proctor and Wieseman)
  • Spreadsheet that contains element beam properties used for debugging
  • One element beam model to check beam stiffnesses
  • Email correspondence as of July 28, 2011 - includes a cursory check of the bending and center of mass locations.

    X1,X2,X3 Inertias/Kappa Mode 1 Freq, Hz Mode 2 Freq, Hz File name (ms103_beam_) 1,0,0 modified* 26.3785483.69360 100_modi_ccs_o1_k_nsm1_nm1 1,0,0 modified*/Beam properties modified 26.3785583.69344 100_modi_ccs_o1_k2_nsm1_nm1 cosa,0,-sina as provided 26.3794983.69533 ca_0_nsa_ccs_o1_k_nsm1_nm1 cosa,0,-sina as provided 26.3794983.69533 ca_0_nsa_ccs_o1_k_nsm1_nm1

    Below are frequencies with different permutations of

  • X1,X2,X3 definitions on CBEAM card
    A) - 1,0,0 or
    B) ca_0_nsa = cos(alpha),0,-sin(alpha) or
    C)nca_0_sa = -cos(alpha),0,sin(alpha) on the beam card
  • coordinate system (CCS) is converted from original
  • O1 indicates that offsets W1-W3 were included between the node and the shear center
  • nsm1 = beam density is unchanged and includes the non-structural mass
  • nsm2 = non-structural mass is separated from the beam mass density
  • nm = calculation of offset N1,N2 for beginning and end of each beam segment is performed - different ways depending on the index
  • modi = inertias provided by Boucke were modified by the alpha.
  • _k_ = kappa(K1,K2) were included in the model - values provided by Boucke (A.B.)
  • _k2_ = kappa(K1/K2) modified along with beam properties per equations provided by A.B.

    Description 1st mode2nd mode Boucke provided frequencies25.3387954778.63642299 100_modi_ccs_o1_k2_nsm1_nm126.3785583.69344

    • Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date April 11, 2025
    Data Update Frequency irregular

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date April 11, 2025
    Publisher Dashlink
    Maintainer
    Identifier DASHLINK_425
    Data First Published 2011-07-05
    Data Last Modified 2025-03-31
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 46ffd3d9-8bbb-4cc9-a574-436c6ff5314b
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://c3.nasa.gov/dashlink/resources/425/
    Program Code 026:029
    Source Datajson Identifier True
    Source Hash e247bd75c44b30742aab138dc2941b50fca342362ef52a65f5f180ca2b941a5e
    Source Schema Version 1.1

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