Direct method for surface forces
Introduction
This chapter discusses the use of the Direct method for surface forces to create force collections in the Import / Export data context: this kind of collection allows to compute forces on a face mesh.
- Description of the approach
- Creation of this force collection
- Limitations
- Example
Description of the approach
Creation of this collection
- In the data tree, select the menu Forces data collection
- In the dedicated GUI for Forces data collection, choose Direct method for surface forces
- Choose a data support to collect the data
- Choose the computation method
- Choose the collection interval:
- Collect for all the steps of the scenario
- Collect only for the current step
- Collect for a specified interval
- Click OK
- Right click on the forces data collection just created in the data tree and run the command Collect data
Once the collection is created and the data collected, forces can be visualized with the Data visualizers and / or exported to OptiStruct with the Data export function.
Limitations
- Only the forces normal to the support can be evaluated
- This collection must be defined at the interface between two regions with different magnetic permeability
Example
In this example, the aim is to compute the global force on the plate of the actuator shown in Figure 1.
To do this, we define a support to collect the data: it comes from the Flux mesh and is the same as the one described in Figure 1; it has been created from the line that we choose to extrude during the creation of the support.
- The approach described on this page
- With Computation on physical entity available in the tab Computation > On physical entity
Approach | Force value (N) |
---|---|
Direct method for surface forces (dFmagS) | 4.53 N |
Computation on physical entity (region) | 4.73 N |