WOLFRAM SYSTEM MODELER
ShaftOnFlexibleSeatingsTwo roller bearings on flexible supports |
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Diagram
Wolfram Language
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SystemModel["RotatingMachinery.Examples.BearingAnalysis.ShaftOnFlexibleSeatings"]
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Information
Bearings on Flexible Seatings
In this example, two NSK cylindrical roller bearings (one with a defect) are seated on flexible supports. In the example of ShaftWithLoad, each bearing is fixed, which is ideal for analyzing the bearing itself. However, to consider vibrations from/to the surroundings, flexible supports are necessary. This example demonstrates the integration of surrounding vibrations into the system.
Figure 1 shows the surrounding vibrations for the two bearings, (dispBearingLeft and dispBearingRight).
Figure 1: Bearing vibrations.
The vibration pattern appears to be defect oriented. Upon examination of the total roller forces of the bearings, it is observed that a 500N defect is present in the right bearing, as depicted in Figure 2.
Figure 2: NSK roller forces.
Parameters (8)
| m |
Value: 0.005 Type: Length (m) Description: Gear module |
|---|---|
| z1 |
Value: 40 Type: Integer Description: Number of teeth in wheel one |
| z2 |
Value: 39 Type: Integer Description: Number of teeth in wheel two |
| x1 |
Value: 0 Type: Real Description: Profile shift for gear wheel one |
| x2 |
Value: -0.1 Type: Real Description: Profile shift for gear wheel two |
| InitialRotationWheel1 |
Value: 90 - 360 / z1 * floor(90 / 360 * z1) Type: Angle_deg (°) Description: Gear wheel initial angle of rotation shaft 1 |
| InitialRotationWheel2 |
Value: 270 - 360 / z2 * (floor(270 / 360 * z2) + 0.5) Type: Angle_deg (°) Description: Gear wheel initial angle of rotation shaft 2 |
| appliedLoad |
Value: -1000 Type: Force (N) Description: The load applied to the shaft |
Components (14)
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world |
Type: World Description: World coordinate system + gravity field + default animation definition |
|---|---|---|
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shaftRight |
Type: CylindricalBeam Description: Class with a flexible cylindrical beam |
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shaftLeft |
Type: CylindricalBeam Description: Class with a flexible cylindrical beam |
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powerSource |
Type: Motor Description: Class for applying a torque to generate a desired angular velocity |
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bearingLeft |
Type: NSK_NU_207_EW Description: Roller bearing parameterized with values corresponding to NSK NU 207 EW |
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bearingRight |
Type: NSK_NU_207_EW Description: Roller bearing parameterized with values corresponding to NSK NU 207 EW |
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spurGear |
Type: SpurGear Description: Spur gear with mass, rotations and visualization |
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pinnedLeft |
Type: PinnedDriveEnd Description: Component that can act as a pinned drive end to a beam, containing different options |
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pinnedRight |
Type: PinnedNonDriveEnd Description: Component that can act as a pinned non-drive end to a beam, containing different options |
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supportRight |
Type: SupportStiffnessDamping Description: Support that acts as a translational two-dimensional coupled spring damper |
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supportLeft |
Type: SupportStiffnessDamping Description: Support that acts as a translational two-dimensional coupled spring damper |
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groundRight |
Type: Fixed Description: Frame fixed in the world frame at a given position |
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groundLeft |
Type: Fixed Description: Frame fixed in the world frame at a given position |
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load |
Type: Force Description: Class that can apply forces along x, y and z axes with a defined interval and amplitude |