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Found 6 results

  1. Hello at all, during a topology optimization of a wireframe of a student racecar the check before optimizing gives the following error: A fatal error has been detected during input processing: *** ERROR # 6001 *** Two of the vectors defined on DTPL card 1 are aligned. I don´t know what to do now. At the end of this text i add a dropbox link to my hm-file, so maybe someone of you can have a look and give me tipps to solve my prob. I guess it could be the connection between the beams (1D) and the design space (solid). i equivalenced them with the equivalence function (in menu SHIFT+F3) in compliance with a small warpage. Maybe the local vectors of the beams are incorrect now. I don´t have any idea. I hope there is someone can help me. greets, Thomas https://www.dropbox.com/s/evz55axqz5ru4r0/TEST_MOdell_7.hm?dl=0
  2. Hi, I would like to optimize 1 D Truss (Sizing Optimization), I do not know, how can I define the design variable in HyperWorks (in OptiStruct), for example, cross-sectional parameters (R, a, b, h). or Length... thanks for your help
  3. Hi. I would like not to mesh a component but account for it creating a mass by the panel 1D --> masses. Though, I do not know what the procedure is. I guess 1. I have to create firstly a property PMASS (create or create/edit?) 2.Then maybe I have to go the panel 1D--> masses. Which elem types do I have to set? Thank you.
  4. Hi everyBody I have a steel frame with a steel plate in the centre, with applied a pressure load; at the exteems of frame i have 4 constrains locking DOF1 DOF2 and DOF3; I have used beam element to create the frame and shell elements to create the plate; I have applied a certain pressure on the shell elements, but i need a impulsive load, how can i create it? How can i perform a transient modal analysis? witch load collectors i need to create? Here there are three images to help you to understand. After that i have to output the values of bending moments, shear and normal stress near a intersection of 3 beams element in the frame; then model the intersection with a 3D and apply the loads i have found from the transient modal Analysis. Where can i reed these kind of values concerning a node of the frame? thank for the support Damir
  5. Hi Guys, i use Pressure to define linear load for 1 D Beam. but it is wrong, displacement is in Y direction (linear load Pload1 in Z direction ). Thanks Very Much Leslie
  6. Hello Everyone, I was looking for support with my FEA model. I don't have any pictures at the moment but hopefully I can explain what's going on and get some models/pictures later. Problem Statement: A curved beam with section centroid at a 6 in radius from a centerline spans 180 degrees and is fixed at one end while an 8000 in-lb moment is applied at the other. What are the stresses on the inside and the outside of the beam? Compare rectangular, circular, and trapezoidal sections with constant cross sectional area. Approach: I imported the arc from a simple iges definition file. I then line mesh with PBEAM elements. Cross sections have been defined correctly in the beamsection collector. Steel material has been generated. Properties for the sections have been created. This property is assigned to the mesh. Loads are put in their separate SPC and MOMENT load collectors. These collectors are passed to the SPC and LOAD parameters of the load step. Optistruct runs and produces the h3d file. Results: For some reason the stress at recovery points C and E for all elements are equal. This doesn't seem right to me. I would like to think that not only would the stress vary from recovery point C to E, but it would also vary (and increase) as the constraint is approached. However, the displacement of the elements and magnitude of said displacement DOES look correct. Can anyone provide insight as to why the SAMAX and SAMIN are equal for all the elements in this mesh? Thanks. EDIT: I've uploaded the result. The BCs are fully fixed on one end and 8000 (in-lbf) applied to the other end. Element is CBEAM with round section of radius 0.97. I'm using units system inch-slug-second. Can anyone help me out here? I'd upload the model file as well but apparently I'm not permitted to upload it.
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