Create Stiffened Panel Mesh

Create a quad-dominant mapped mesh from a network of orthogonal lines for global FE model creation. Beam/Bar/Rod elements are created around panel edges.

Restriction: Only available for Nastran and OptiStruct solvers.
Use this tool to:
  • Create mapped quad mesh using orthogonal lines that form rectangular panels.
  • Create quad surface regions automatically using boundary lines.
  • Create 1D stiffeners that surround panels.
  • Apply a panel property per panel.
  • Generate a Stiffened Panel PartAssembly with Panels and Stiffeners underneath.
Note: It is recommended that your model have orthogonal lines.
  1. From the Concept ribbon, click the Stiffened Panel tool.

    Figure 1.
  2. Select lines.
    1. Select a collection of parallel lines that define “longitudinal stiffeners”.
    2. Select a collection of parallel lines that define “lateral stiffeners”.
    Ideally, the two sets of lines are selected form an orthogonal network of lines from which panel surfaces are inferred.

    Figure 2.
  3. Optional: Select a panel property to assign to shell mesh.
    The selector filters the list of available properties to retain only:
    • PSHELL

    The selected property is duplicated and a copy is assigned per panel.

  4. Click on the guide bar to select options for model organization.
    Model Organization
    • Create geometry and mesh in current component.
    • Create a new component to store panels and stiffeners
    • Create Part Assembly:
    The last option generates a new Part Assembly called “Stiffened Panel” with the following hierarchy:
    Stiffened Panel
    Panel 1
    Panel n
    Longitudinal Stiffeners
    Longitudinal 1
    Longitudinal m
    Lateral Stiffeners
    Lateral 1
    Lateral k
    Stiffener Prefix
    Give a prefix to name stiffener components/parts per lateral/longitudinal directions, the default being Frames & Stringer.
    Delete Geometry
    Select to keep panel surfaces (organized with panel mesh) or delete after panel mesh.
    If "ignore material" is turned on, the tool assess area moments of inertia without considering the source material. If it is off, then material weighted moments of inertia are calculated.
  5. Click Find panels.
    If panels are found, surfaces are created. Among the panels found, one of them (from four corners) is selected as a starting point. The whole mesh is treated as a single rectangular panel so element IDs increase by 1 along rows then jump to the next row.
  6. If desired, update the numbering schema.
    “Origin Point” and “Renumber Direction” are point selectors that define the primary direction (row).

    At this stage, the Origin point is highlighted and a green arrow illustrates the numbering direction.

    To change the schema:

    1. Select Origin Point then select one of the four corners of the created surfaces.
    2. Select Renumber Direction then pick the opposite point that defines the primary direction.
  7. Optional: Click in the microdialog to flip the red arrow direction, which illustrates on which side of the panels stiffeners will be created.

    Figure 3.
  8. Define the mesh size and stiffener property.
    1. Select the manipulator on a reference panel edge and change the density.
      Only a single manipulator can be active at a time.
    2. Click the property selector in the active manipulator.
      This allows you to either select a property or a beamsection.
      If a property is selected, a filter enables only:
      • PBAR/L
      • PBEAM/L
      • PROD

      Depending on the property card image selected, 1D stiffeners are created accordingly. If a beamsection is selected, then the tool generates PBEAM/CBEAM elements by default.

    Figure 4.

    Figure 5.