HyperMesh and BatchMesher

Velocities Panel

Velocities Panel

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Velocities Panel

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Location:   Analysis page

 

Use the Velocities panel to create concentrated velocities. This is accomplished by applying a load, representing velocities, to a node.

Velocities are load config 8 and are displayed as a vector with the letter V at the tail end.

By default, velocities are displayed relative to the model size. You can change this size by entering a different value in the relative size field.  You can also use the uniform size option to have all loads displayed as the same size.

Finally, you can remove the on-screen text labels of all velocities by deactivating the label loads checkbox.

 

Subpanels and Inputs


The Velocities panel contains the following subpanels:

hmtoggle_arrow1Create

Panel Inputs

Input

Action

entity selector

Choose the entities to apply the velocity to: nodes, sets, comps, points, surfs, or lines.

In any case, the velocities are applied to nodes; this selection simply determines how those nodes are selected.  Geometric points select the nodes at which they exist. Comps select all of the nodes contained within the chosen component.

If you choose comps or sets, HyperMesh draws the velocities using a single indicator.  As a result, a new button called display appears.  This allows you to indicate where in the model you wish the indicator to be drawn, and requires additional steps.

When nodes is selected, use the switch to change the selection mode.

nodes

Select individual nodes.

faces_edges_nodes

faces

Select all of the nodes on 2D and 3D faces.

If there are discontinuities on a 2D face, then only the nodes inbetween the discontinuities will be selected.

faces_edges_faces_nodes

2D faces ext

Select all of the nodes on a 2D face that contain discontinuities.

faces_edges_2d_face_ext_nodes

loops

Select all of the nodes on continuous free edges that make a closed loop simultaneously, such as the perimeter of a hole.

Only valid for SHELL elements.

faces_edges_loops_nodes

free edges

Select all of the nodes on free edges of elements.

If there are discontinuities on an edge, then only the nodes on the free edges inbetween the discontinuities will be selected.

Only valid for SHELL elements.

faces_edges_free_edges_nodes

free edges ext

Select all of the nodes on free edges of elements that contain discontinuities.

Only valid for SHELL elements.

faces_edges_free_edges_ext_nodes

edges

Select all of the nodes on free edges or shared edges (butt joints, L/corner joints, and T-joints) of elements.

If there are discontinuities on an edge, then only the nodes on the edge inbetween the discontinuities will be selected.

Only valid for SHELL elements.

faces_edges_edges_nodes

edges ext

Select all of the nodes on free edges or shared edges (butt joints, L/corner joints, and T-joints) of elements that contain discontinuities.

Only valid for SHELL elements.

faces_edges_edges_ext_nodes

global system / local

Specify the method of determining the velocity’s magnitude.

magnitude =

Specify the method of determining the velocity’s magnitude.

If you select constant components, type in the x, y, and z values of the components.

If you choose constant vector, type in a value for magnitude =.  Then, use the plane and vector selector to define the velocity vector.

If you choose curve, vector type the magnitude into the magnitude = field.  This acts as a multiplier on the curve’s Y scale (example velocity).

If you choose curve, components, type in the x, y, and z components of the magnitude.  This provides the direction and magnitude; for example, (6,2,4) is twice the magnitude of (3,1,2).

relative size / uniform size

relative size = display velocities in a size relative to the model size (default 100).

uniform size = display all velocities with the same size.

label loads

Display the value of the velocity.

face angle / individual selection

Face angle

Value used to determine which of the selected elements are to have velocities applied. For velocities applied to faces, once the starting face has been identified, the normals of the adjacent remaining faces are tested. If the angle between the normals is less than the face angle, a velocity is applied to the adjacent element. This process continues until all of the free faces have been tested. For a velocity applied to edges, the process is similar except that the angle between edges is used instead of the angle between faces.

Only available when the entity selector is set to nodes and the selection mode is set to faces, 2d faces ext, free edges, free edges ext, edges, or edges ext.

Individual Selection

Select individual elements on a face or select individual free/shared edges of elements.

Only available when the entity selector is set to nodes and the selection mode is set to faces, free edges, or edges.

edge angle

Splits edges that belong to a given face.

When the edge angle is 180 degrees, edges are the continuous boundaries of faces. For smaller values, these same boundary edges are split wherever the angle between segments exceeds the specified value. A segment is the edge of a single element.

Only available when the entity selector is set to nodes and the selection mode is set to free edges, free edges ext, edges, or edges ext.

 

hmtoggle_arrow1Update

Panel Inputs

Input

Action

entity selector

Choose the entities to apply the velocity to: nodes, sets, comps, points, surfs, or lines.

In any case, the velocities are applied to nodes; this selection simply determines how those nodes are selected.  Geometric points select the nodes at which they exist. Comps select all of the nodes contained within the chosen component.

If you choose comps or sets, HyperMesh draws the velocities using a single indicator.  As a result, a new button called display appears.  This allows you to indicate where in the model you wish the indicator to be drawn, and requires additional steps.

global system / local

Specify the method of determining the velocity’s magnitude.

magnitude =

Specify the method of determining the velocity’s magnitude.

If you select constant components, type in the x, y, and z values of the components.

If you choose constant vector, type in a value for magnitude =.  Then, use the plane and vector selector to define the velocity vector.

If you choose curve, vector type the magnitude into the magnitude = field.  This acts as a multiplier on the curve’s Y scale (example velocity).

If you choose curve, components, type in the x, y, and z components of the magnitude.  This provides the direction and magnitude; for example, (6,2,4) is twice the magnitude of (3,1,2).

relative size / uniform size

relative size = display velocities in a size relative to the model size (default 100).

uniform size = display all velocities with the same size.

label loads

Display the value of the velocity.

 

 

 

See Also:

Loads on Geometry

An Alphabetical List of HyperMesh Panels