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  1. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    Hi all, I have tested, and ASET is used to reduce the computational effort; however, it seems that ASET1 is different from the constraint. For example: - With format: ASET1 123 1 34 mean node 1, node 34 has DOFs (Degrees of Freedom) in the translational x, y, z directions but no rotation. So...
  2. Giang123

    ASET1 card in NASTRAN

    Hi sdm919, I have tested, and ASET is used to reduce the computational effort; however, it seems that ASET1 is different from the constraint. For example: - With format: ASET1 123 1 34 mean node 1, node 34 has DOFs (Degrees of Freedom) in the translational x, y, z directions but no rotation...
  3. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    Hi all, After rechecking with the professor, I realized that the issue was related to the unit system. The problem was that the problem should be using the unit of kgf instead of kN, as I mentioned earlier. When I switched to kgf, the results matched. However, I still encountered the following...
  4. Giang123

    SWITCH FROM GLOBAL MODE TO LOCAL MODE IN MSC NASTRAN

    How to switch from global mode to local mode when solving normal mode in MSC NASTRAN?
  5. Giang123

    convert a data model from MSC NASTRAN software to ABAQUS

    Hi all, I am currently looking to convert a data model from MSC NASTRAN software to ABAQUS. However, I have noticed that in NASTRAN, the moment of inertia information is defined as I1 = Izz and I2 = Iyy, while in ABAQUS, it is I1 = Iyy and I2 = Izz. So, when converting from NASTRAN to ABAQUS, do...
  6. Giang123

    ASET1 card in NASTRAN

    Hi all, I have a question about the ASET1 card in NASTRAN. When it is added to a BDF file, what does it mean? I read the manual, and it specifies the DOFs of a node that you want. However, in the case of a node within a shell element, theoretically, a shell element always has 6 DOFs. But in...
  7. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    Hi ThomasH, I am using a unit as you described in the table below, and it is not made of steel.
  8. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    Hi ThomasH, My task requires converting from MSC NASTRAN software to ABAQUS, so I'm using a BDF file for importing. The material information is correct and is in millimeter unit system, provided by a company. I only use static analysis
  9. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    Hi centondollar , My figure shows the text "Sol 103 (Frequency"), which is unrelated. I just took a screenshot to show everyone the model with a cross-section, boundary constraint in ABAQUS. Can you please take a look at the attached .inp file above? I posted on the forum because I'm new, and I...
  10. Giang123

    change the scale deflection

    Hi all, How to change the scale deflection of the displacement results in MSC NASTRAN software? Example:
  11. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    My mistake for not carefully providing information to everyone, I checked the model information before posting on this forum: Before posting my question here, I made sure to match the data between the two software regarding mass, center of gravity, net force, and moment. - ABAQUS and NASTRAN...
  12. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    I have mentioned before that my model includes SHELL and BEAM cross sections L. I have conducted the following test cases, and the results differ by only 1 to 5%: - Model with only shell elements. - Model with only L-shaped beam elements. - Model with both shell elements and one L-shaped beam...
  13. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    I tried setting the density of CBEAM to 0, and the results matched. I'm not sure if there are any differences between ABAQUS and NASTRAN regarding the CBEAM element (I'm using a first-order beam element). Is it related to the mass matrix or not, or mesh. It may be related to algorithms.
  14. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    Hi all, I apologize for not being clear in describing the results above. You can see the image below because I am using a BDF file from MSC NASTRAN to import into ABAQUS, so there should be no difference between NASTRAN and ABAQUS in terms of settings and force directions. Displacement at NODE...
  15. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    My model consists of a shell and BEAM with a cross section L. I only solved for selfweight to validate the results. You can find the attached input file below and the results from NASTRAN and ABAQUS. MSC NASTRAN software ABAQUS software...
  16. Giang123

    VALIDATE RESULTS NASTRAN AND ABAQUS

    Hi all, Currently, I am validating between MSC NASTRAN software and ABAQUS software. I import a BDF file into ABAQUS; however, the ABAQUS results differ by 19% compared to MSC NASTRAN. So, I'm not sure if there's anything specific to consider when importing a BDF file into ABAQUS. I have...

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