Creating Dashpot Properties

A dashpot connection property is a flexible link that fastens two points together, similar to a spring. Dashpot connection properties are designed to handle incompatible meshes. Dashpot connection properties also take into account the elastic deformability of the interfaces.

The support for a dashpot connection property is a general analysis connection defined in Abaqus for CATIA V5. When creating a dashpot connection property, you can use only general analysis connections that join one point to another point—connections that include a face or an edge are not allowed. Table 6–10 summarizes the connections that can be used to define a dashpot connection in Abaqus for CATIA V5.

Table 6–10 Dashpot connection properties.

Assembly Design WorkbenchAbaqus for CATIA V5
Coincidence ConstraintContact ConstraintGeneral Analysis Connection
  

You can use dashpot connection properties to model relative velocity-dependent force or torsional resistance. You can model axial dashpots whose force acts only along the length of the dashpot or general dashpots where you define the damping rate associated with each linear and rotational degree of freedom. For each dashpot type you can choose a linear, constant damping definition or enter tabular damping data corresponding to the relative velocity of the dashpot.

You can request history output of relative velocities and rotations and of total, elastic, viscous, and reaction forces and moments from a dashpot connection property. The support for the history output request is the connection mesh.

This task shows you how to create a dashpot connection property between two parts.

  1. Click the Dashpot Connection Property icon .

    The Dashpot Connection Property dialog box appears, and a Dashpot object appears in the specification tree under the Nonlinear and Thermal Properties objects set.

  2. You can change the identifier of the dashpot connection property by editing the Name field.

  3. In the specification tree, select a general analysis connection created previously in Abaqus for CATIA V5. (The connection must join one point to another point.)

    The Supports field is updated to reflect your selection.

  4. Select an axial or general dashpot type.

  5. Select a linear or nonlinear dashpot definition.

  6. If you are creating a general dashpot, select the desired axis system.

  7. If you specified a local axis system, select a Cartesian, a Cylindrical, or a Spherical local orientation. See Using Local Coordinate Systems for more information.

  8. Enter the dashpot force data for the selected dashpot type and definition as follows:

    Axial linear dashpots

    Enter the damping data.

    General linear dashpots

    Enter the directional damping components.

    Nonlinear dashpots

    Complete the table for an axial nonlinear dashpot—or the component tables for a general nonlinear dashpot—by entering the dashpot force and relative velocity values in ascending order of relative velocity.

  9. Click OK in the Dashpot Connection Property dialog box.

    A symbol representing the dashpot connection property appears on the corresponding faces.