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  1. homusubi

    Flexible joint between beam188 elements

    PD: does anybody know how to properly configure the stiffness matrix for a MPC184 general joint with 6 DOF? So far I understood the diagonal elements D11,D22,D33 should be the spring constant (K) in the X,Y and Z direction, and D44,D55 and D66 the torsional stiffness around X, Y, Z. But what...
  2. homusubi

    Flexible joint between beam188 elements

    Thanks for your answer. That will probably work, although it will mean adding a lot of elements in each joint. Are there spring elements with stiffness in more directions?
  3. homusubi

    Flexible joint between beam188 elements

    Hello, I want to model a truss structure made for different kind of profiles. I'm only interested in the global displacements, and not in the stresses at the joints. Until not I'm using Beam188 to simulate all beams and columns using ADPL. In some parts of the structure neoprene pads are used...
  4. homusubi

    Variable moments on pipe, from 2D to 3D

    Thank you much Kundalin1. I haven’t read the section that you recommended me… but let me see if I understood correctly (if not, correct me please!). The idea is to get the corresponding X mode shape of the pipe. Then, we will introduce the displacement of the X mode with command UPGEOM, using...
  5. homusubi

    Variable moments on pipe, from 2D to 3D

    Hello everybody! I’m trying to check if the walls of the composite sandwich pipe (SHELL91 elements) don’t fail by buckling. The loads input are obtained from a 2D dynamic model made in Matlab. From the 2D model I get the lateral displacement from the vertical pipe (that can be derived twice to...

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