Guidelines for Bearing Loads
When working with bearing loads, keep the following guidelines in mind:
Bearing loads are not available in FEM mode.
You can apply this type of load to a non-right cylindrical surface with spline.
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A bearing load applied to an elliptical surface in Wildfire 3.0 or earlier is invalid in Pro/Engineer Mechanica Wildfire 4.0 and later versions.
The cylindrical surface must have a straight centerline.
Although selection of conical surfaces for bearing loads is not recommended, you can select conical surfaces if you set the value of the configuration option sim_bearing_allow_cone_sel to yes.The selected surface must also meet the following criteria:
The difference between the larger and smaller radii of the cylindrical surface must be less than or equal to 10% of the larger radius.
1–(smaller radius)/(larger radius) <= 0.1 (larger radius)
In the following example the conical surface has the following properties:
smaller radius = 22.8128
larger radius = 25.0
1. smaller radius = 22.8128
2. larger radius = 25.0
1–(smaller radius)/(larger radius) = 0.0875
0.1 (larger radius) =2.5
Hence these conical surfaces meet the criterion and you can select them when creating a bearing load.
If you select several holes, while applying a bearing load, the load is not divided between the selected holes. Instead, each hole is assigned with the bearing load that you specified on the Bearing Load dialog box.
You can apply this type of load to open surfaces. However, surfaces must be connected to form a portion of a cylinder. The software displays the bearing load distribution toward the inside of the surface region.
The vector you specify must have at least one component that is not parallel to the axis of any hole you select. If you specify a vector that is fully parallel to the axis, the software does not accept the load.
The software defines a bearing load distribution as a cosine distribution that does not vary down the length of the centerline. This distribution enables you to quickly apply compression-only bearing loads to cylinders and rings.
If the load is not symmetrical about the axis and if the resultant load is not passing through the selected references, the load may create a moment about bearing axis. Use the Home > Loads > Review Total Load command to check the resultant load.
Return to Bearing Loads.
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