Edit Compliant Joints or Bushings

The Trans Stiffness and Rot Stiffness tabs allow you to define the stiffness properties of a compliant joint or a bushing. Stiffness can be linear or non-linear.

  1. In the Trans Stiffness tab, complete the following steps:
    1. For the Kx, Ky, Kz Linear field, enter the translational stiffness coefficient in the local x, y, z direction.
    2. For the Kx, Ky, Kz Curve field, enter the force transmitted through the bushing, expressed in the form of a force vs. displacement curve that is a function of a set of independent variables.
      • Select an Interpolation method and enter a variable value.
      • Resolve the curve by clicking Curve and selecting the curve to resolve.
    3. For the Kx, Ky, Kz Spline3D field, complete the steps below:
      • Select an Interpolation method and enter an expression for Independent Variable X and Z.
      • Resolve the 3D spline by clicking 3D Spline and selecting the entity to resolve.
    4. For the Kx, Ky, Kz Expression field, enter the force transmitted through the bushing, in the form of a function expression.
  2. Click on the Rot Stiffness tab and complete the following steps:
    1. For the Ktx, Kty, Ktz Linear field, enter the rotational stiffness coefficient in the local x, y, z direction.
    2. For the Ktx, Kty, Ktz Curve field, enter the torque transmitted through the bushing, expressed in the form of a torque vs. displacement curve that is a function of a set of independent variables.
      • Select an Interpolation method and enter a variable value.
      • Resolve the curve by clicking Curve and selecting the curve to resolve.
    3. For the Ktx, Kty, Ktz Spline3D field, complete the steps below:
      • Select an Interpolation method and enter an expression for Independent Variable X and Z.
      • Resolve the 3D spline by clicking 3D Spline and selecting the entity to resolve.
    4. For the Ktx, Kty, Ktz Expression field, enter the torque transmitted through the bushing, in the form of a function expression.

The Trans Damping and Rot Damping tabs allows you to define the damping properties of a compliant joint or bushing. Damping can be linear or non-linear.

  1. In the Trans Damping tab, complete the following steps:
    1. For the Cx, Cy, Cz Linear field, enter the translational damping coefficient in the local x, y, z direction.
    2. For the Cx, Cy, Cz Curve field, enter the force transmitted through the bushing, expressed in the form of a force vs. displacement curve that is a function of a set of independent variables.
      • Select an Interpolation method and enter a variable value.
      • Resolve the curve by clicking Curve and selecting the curve to resolve.
    3. For the Cx, Cy, Cz Spline3D field, complete the steps below:
      • Select an Interpolation method and enter an expression for Independent Variable X and Z.
      • Resolve the 3D spline by clicking 3D Spline and selecting the entity to resolve.
    4. For the Cx, Cy, Cz Expression field, enter the force transmitted through the bushing, in the form of a function expression.
  2. Click on the Rot Damping tab and complete the following steps:
    1. For the Ctx, Cty, Ctz Linear field, enter the rotational damping coefficient in the local x, y, z direction.
    2. For the Ctx, Cty, Ctz Curve field, enter the torque transmitted through the bushing, expressed in the form of a torque vs. displacement curve that is a function of a set of independent variables.
      • Select an Interpolation method and enter a variable value.
      • Resolve the curve by clicking Curve and selecting the curve to resolve.
    3. For the Ctx, Cty, Ctz Spline3D field, complete the steps below:
      • Select an Interpolation method and enter an expression for Independent Variable X and Z.
      • Resolve the 3D spline by clicking 3D Spline and selecting the entity to resolve.
    4. For the Ctx, Cty, Ctz Expression field, enter the torque transmitted through the bushing, in the form of a function expression.
  3. Click the Preload tab.
    1. For the Fx, Fy, Fz field, enter the initial translational preloads in the local x, y, z directions.
    2. For the Tx, Ty, Tz field, enter the initial torque preloads in the local x, y, z directions.