Such a surface is positioned by a user-defined coordinate system in the Coordinate Systems branch. If the Summation point is not suitable located, the moment reaction result will be invalid.Īs in the case of a Force Reaction, note that setting of the “Extraction” side will affect the sign of the results.Ĭonclusions | Construction Geometry BranchesĪ Construction Geometry branch in the Workbench Mechanical outline can be used to position a Surface that cuts through a solid model. If “Orientation System” is chosen, then the “Orientation” coordinate system must have its origin in a suitable location-usually the centroid of the shape of the cut that the surface makes where it cuts through the solid geometry. Requesting a Moment Reaction, as illustrated in the figure below, is more difficult because a Summation point needs to be selected. If the negative side is selected, the forces will be equal but opposite those listed. Note that “Extraction” is set to “Mesh From Positive Side”. Positive Side Meshing | Construction Geometry The result is scoped to the solid body geometry, and the Results listed show forces in X, Y and Z in the Orientation indicated by the selected coordinate system. In the figure below, a Force Reaction is located at a Surface, which is defined to be the Construction Geometry Surface defined earlier. In addition to mapping of results directly onto surfaces, Probes can be used to examine forces across these surfaces. The following figure illustrates mapping of Normal Stress in the Z direction from a body to a surface: Various results can be scoped to the location where a Construction Geometry Surface cuts through scoped bodies in a model. Once the Surface of interest has been created in the Construction Geometry branch, the model can be solved, and a Force Reaction probe can be inserted in the Solution branch for the environment of interest. In the figure below, we see a Construction Geometry Surface positioned on the figure above coordinate system. If moments are to be measured where the X-Y plane cuts across a body, the origin of the coordinate system should be positioned at the centroid of the shape formed where the plane cuts the body. In the figure below, a Cartesian coordinate system has been positioned with its X-Y plane across a solid body of interest. Various means can be employed to position the origin of a coordinate system, and to orient its X, Y and Z axes. To position a Section in Construction Geometry requires that the user create a coordinate system. Note: Requires Ansys 14.5 or laterĬreation of a Coordinate System and a Surface This document briefly reviews using a surface to measure force at such a cut. A Surface object is positioned by a user-created coordinate system, and can be used to measure the net force in the model across a cut represented by the surface cutting through scoped geometry. Industrial Equipment and Rotating MachineryĪnsys Mechanical (Workbench) has a Construction Geometry object for Surfaces, as well as for Paths that cut through a solid geometric entity.Torsional Vibration Measurements Testing.Fluid Flow & Thermal Applications (CFD).Electronic and Electrical Applications (EM).
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