Mapping target set (Simcenter Samcef)

Use a Mapping Target Set for Mechanical Nodes constraint or a Mapping Target Set for Mechanical Shells constraint in a mapping solution to restrict the mapping of thermal or flow data from a source model to a selected set of nodes or elements in the target model.

(1) Thermal source model; (4) and (6) thermal zones; (2) structural target model; (5) and (7) structural zones; (3) source zones not mapped to the target model

• To map an External Thermal Group source of 2D or 3D thermal elements to a target selection of structural nodes, use the Mapping Target Set for Mechanical Nodes constraint.

• To map an External Thermal Group source of 3D thermal volumes to a target selection of structural shells, use the Mapping Target Set for Mechanical Shells constraint.

Understanding the mapping

The mapping works by nodes interpolation. For each Mapping Thermal Set pair, a structural mechanical node must be located inside a thermal element of the External Thermal Group source. However, in certain circumstances, this node cannot be located inside a thermal element, but it is considered close enough so that it can be replaced by its projection either on the element border or on the element itself. This allows the computation to take place.

A node can be:

• Out-of-plane but with a projection inside a thermal element (1).

• Out-of-plane but with a projection on a thermal element edge (2).

• Outside but with a projection on a thermal element edge (3).

Controlling the mapping—lateral tolerance

The lateral tolerance drives how close to the thermal element edge a mechanical node or its projection can be.

The Tolerance list lets you select an Absolute or Relative tolerance mode.

• If you select Absolute, you can define an absolute Lateral Tolerance value.

• If you select Relative, you can define a relative Lateral Tolerance factor.The valid range is [0, 1]. For instance, with a 0.02 relative Lateral Tolerance value, any node that is 2% (or less) close to a thermal element is projected on this element.

Note:

If no Lateral Tolerance value is defined, the solver computes a tolerance value.

Controlling the mapping—out-of-plane tolerance (Mapping Target Set for Mechanical Shells only)

The out-of-plane tolerance drives how far from a thermal element a node can be.

You can define an Out Of Plane Tolerance value beyond which a node is rejected.

Note:

If no Out Of Plane Tolerance value is defined, the solver computes a tolerance value.

Controlling the mapping—maximum inclination tolerance (Mapping Target Set for Mechanical Shells only)

In a mechanical shells model to thermal volumes mapping solution, data on both the upper (1) and lower (2) skins of the outer faces of the thermal volumes are used in the mapping solution.

However, lateral faces (which are also outer faces) can interfere with the projection of mechanical nodes, especially if the faces definition planes are close enough to the normals (3) on shells used in the projection action. In these situations, if these lateral faces are taken into account, projection can lead to multiple results (4).

To discard these lateral faces, you can specify a Maximum Inclination tolerance value. All the outer faces with an inclination smaller than the specified value are neither upper skin nor lower skin and are discarded.

Note:

If no Maximum Inclination value is defined, the default value is 45 degrees.

Where do I find it?

Application	Pre/Post
Prerequisite	A Simulation file as the work part and displayed partSimcenter Samcef as the specified solverStructural as the specified analysis typeMapping as the specified solution type
Simulation Navigator	Under the active solution node, right-click Constraints→New Constraint→Mapping Target Set for Mechanical Nodes or Mapping Target Set for Mechanical Shells

Look up more details

Mapping Target Set for Mechanical Nodes and Mapping Target Set for Mechanical Shells dialog boxes (Simcenter Samcef)

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Mapping target set (Simcenter Samcef), Simcenter 3D 2021.1 Series

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