Rotation geometry how to#

It is also necessary to define the point about which the domain is scaled,, and this defines the deformation field of the domain: Will leave the x-dimensions unchanged, scale the y-dimension up by two, and reduce the z-dimension by half. The scale factor matrix,, is a diagonal matrix with entries corresponding to scaling the Cartesian directions. To model a domain that is expanding or contracting about the global Cartesian coordinate system, it is necessary to define a scale factor matrix and a point to scale about. This translation example is shown in the above screenshot and implemented in the exercise file.

Using the Prescribed Deformation feature to implement translation.įor example, to move a domain along a helical spiral path centered along a line parallel to the Z-axis and offset from its original position, use these expressions for the prescribed deformation:ĭx = (1+t*0.25)*cos(2*pi*t*1)+1ĭy = (1+t*0.5)*sin(2*pi*t*1)+0.5 Use these expressions within a Moving Mesh > Prescribed Deformation feature such that every point within the domain is offset from its original location by the same amount. To model the translation of a domain, such as for the movement of a part in space, define the expression of a translation curve in space.

Within each plot group, it is also possible to plot the dataset edges, using different frames.

Rotation geometry how to#

Screenshot showing how to select the frame used to plot results. Each plot group can also plot the edges of the dataset, in a selected frame, as shown below. To verify which frame is being used for making plots, use the Frame setting within a Dataset feature, as shown in the screenshot below. The difference represents a displacement of the material. A difference between the Spatial and Material frame coordinates may be induced by Moving Mesh features or structural mechanics interfaces, which control the Spatial frame. Spatial frame coordinates, default, are fixed in space.The difference represents a different configuration of the material, i.e., effectively a different shape of solid objects. A difference between Material and Geometry frame coordinates may be induced by Deformed Geometry or Shape Optimization features in the model. Material frame coordinates, default, are fixed in the material in solid domains.Geometry frame coordinates, default, are fixed in the CAD geometry in 3D.Another way to keep track of this is in terms of these three frames: It is not possible to solve for both Solid Mechanics and Moving Mesh within the same domain. The Deformed Geometry interface, on the other hand, implies that material is being added and removed from a domain as it translates through space, and is appropriate for models involving the Solid Mechanics interfaces, which themselves compute a deformation of the solid material as defined on the Material frame. In most cases, the Moving Mesh interface is the appropriate interface to use, since in this interface, the material, and solution, moves with the spatial deformation. The Moving Mesh and Deformed Geometry Interfaces Using these interfaces usually avoids any remeshing of the geometry or solving of additional equations. The Deformed Geometry and Moving Mesh interfaces are useful for modeling situations where a domain is deforming, as well as when it is moving in a completely prescribed way, either as a function of time or as a function of a model parameter in a parametric sweep or auxiliary sweep. Applying Translations, Scaling, Reflection, and Rotation via the Deformed Geometry and Moving Mesh Interfaces