- the earlier implementation of externally controlled lumped point
motion (see merge request !120 and OpenFOAM-v1706 release notes) was
conceived for the motion of simple structures such as buildings or
simple beams. The motion controller was simply defined in terms of
an orientation axis and divisions along that axis.
To include complex structures, multiple motion controllers are
defined in terms of support points and connectivity.
The points can have additional node Ids associated with them, which
makes it easier to map to/from FEA models.
OLD system/lumpedPointMovement specification
--------------------------------------------
//- Reference axis for the locations
axis (0 0 1);
//- Locations of the lumped points
locations (0 0.05 .. 0.5);
NEW system/lumpedPointMovement specification
--------------------------------------------
// Locations of the lumped points
points
(
(0 0 0.00)
(0 0 0.05)
...
(0 0 0.50)
);
//- Connectivity for motion controllers
controllers
{
vertical
{
pointLabels (0 1 2 3 4 5 6 7 8 9 10);
}
}
And the controller(s) must be associated with the given
pointDisplacement patch. Eg,
somePatch
{
type lumpedPointDisplacement;
value uniform (0 0 0);
controllers ( vertical ); // <-- NEW
}
TUT: adjust building motion tutorial
- use new controllor definitions
- replace building response file with executable
- add updateControl in dynamicMeshDict for slowly moving structure
- Eg, with surface writers now in surfMesh, there are fewer libraries
depending on conversion and sampling.
COMP: regularize linkage ordering and avoid some implicit linkage (#1238)
- This provides a mechanism for moving mesh patches based on external
input (eg, from an external structures solver). The patch points are
influenced by the position and rotation of the lumped points.
BC: lumpedPointDisplacementPointPatchVectorField
Controlling mechanisms:
- externalCoupler
for coordinating the master/slave
- lumpedPointMovement
manages the patch-points motion, but also for extracting forces/moments
- lumpedPointState
represents the positions/rotations of the controlling points
Utils:
- lumpedPointZones
diagnostic for visualizing the correspondence between controlling
points and patch faces
- lumpedPointMovement
Test that the patch motion is as desired without invoking moveMesh.
With the -slave option, return items from a precalculated table
for the lumpedPointDisplacementPointPatchVectorField BC.
