Deformation, its time derivatives and forces are reported in the Motion Postprocessor as shown in the table below.
Figure 6.16: Definition of Spring outputs
| Parameter | Symbol | Description | Dimension |
| Force_on_Action_Marker |
|
The acting force vector on the action marker can be calculated as follows:
where, the variables | Force |
| - Measure_in_Base_Marker |
|
The acting force vector is transformed into the reference frame of the base marker as follows:
where, the variable | Force |
| - Measure_in_Action_Marker |
|
The acting force vector is transformed into the reference frame of the action marker as follows:
where, the variable | Force |
| Torque_on_Action_Marker |
| The acting torque vector on the action marker is zero. | Force*Length |
| - Measure_in_Base_Marker |
| The acting torque vector transformed in the reference frame of the base marker is zero. | Force*Length |
| - Measure_in_Action_Marker |
| The acting torque vector transformed in the reference frame of the action marker is zero. | Force*Length |
| Force_on_Base_Marker |
|
The reacting force vector on the base marker can be represented as follows:
| Force |
| - Measure_in_Base_Marker |
|
The reacting force vector is transformed into the reference frame of the base marker as follows:
| Force |
| - Measure_in_Action_Marker |
|
The reacting force vector is transformed into the reference frame of the action marker as follows:
| Force |
| Torque_on_Base_Marker |
| The reacting torque vector on the base marker is zero. | Force*Length |
| - Measure_in_Base_Marker |
| The reacting torque vector transformed in the reference frame of the base marker is zero. | Force*Length |
| - Measure_in_Action_Marker |
| The reacting torque vector transformed in the reference frame of the action marker is zero. | Force*Length |
| Deformation_l |
|
The deformation can be calculated as follows:
where, the variables | Length |
| Relative_Velocity |
| The relative velocity can be calculated as in Translational Spring Force. | Length/Time |
