Shafts and bearings

Module List E1 (Basic)

Module List E2 (Expert)

WPK Shafts and bearings
Calculation of deformations, including for statically overdetermined systems and line loads
Shaft rough sizing
3D display of forces and diagrams of bending during shaft modeling
Mirror shaft
Load a background drawing and display millimeter grid
Flank line modification (module WA2)
Support with rolling bearings, plain bearings or general supports
A shaft strength calculation, according to either DIN 743 (module WA6), FKM Guideline (module WA7), Hänchen & Decker (module WA5) or AGMA 6101-F19 and AGMA 6001-F19 (module WA10)
Smith and Haigh diagrams
Calculation of rolling bearing rating life (ISO 281, L10h), also via SKF Cloud®
Selection of suitable rolling bearing, based on rolling bearing rating life
Bearing frictional power loss, input of linear bearing stiffness
Comprehensive bearing database, with some internal geometry details, also via TIMKEN's Cloud service
Calculation of rotation and over-rolling frequencies of rolling bearings
Rights: W01, W01c, W01f, W03a, W05, W05e, W15, W51b, W51c

WA6 Strength according to DIN 743, 2012 edition
Shaft sizing based on constant equivalent stress and maximum deformation
Verification for multiple notches including an input option for FE results according to FVA 700 I
Rights: W06b, W06r

WB1 Modified bearing calculation
Calculation of rolling bearing rating life Lnmh
Influence of lubrication according to ISO 281-1
Thermally permissible service speed acc. DIN 732
Lubrication, lubricant temperature, friction and contamination can be defined for each individual rolling bearing
Bearing rating life and modified rating life calculation using SKF Cloud®. Calculation of hybrid bearings according to the GBLM method in SKF Cloud®.
Rights: W05a

WA1 Shaft systems and bearing stiffness
Definition of shaft systems with several coaxial shafts
Taking into account bearing offset, bearing clearance, thermal expansion, linked shafts, calculation of non-linear bearing stiffness from the internal geometry
Calculation with rolling bearing stiffness matrices from SKF Cloud®
Temperature conditions for inner and outer ring and for rolling body
Approximation of internal bearing geometries with optional input of the number of rolling bodies and other data already available from bearing manufacturers
Radial bearing can be calculated either with or without an inner or outer ring
Rights: W01a, W01b, W03b, W03c, W03d, W05d

WA8 Load spectra for shafts and bearings
Calculation of shaft limited life and endurance strength
Bearing calculation with load spectra
Setting of a different temperature for each load bin, affecting the calculation of bearing clearance and service life according to ISO/TS 16281
Rights: W01s, W06s, W06t

WB2 Calculation of reference rating life with internal geometry according to ISO/ ISO 16281
Calculation of rolling bearing rating life Lnrh and Lnmrh (requires module WB1)
Diagram of the load distribution in the bearing
Diagram of the load distribution over the rolling bodies and races
User-specified input of roller profiles
Graphic showing stresses under the contact surface
Calculation of bearing rating life Lnrh und Lnmrh (requires module WB1) using SKF Cloud®
Required module: WA1
Rights: W05b, W05c

General Description

Shafts and coaxial shaft systems

General

Graphical shaft editor for fast modelling
Calculates stress concentrations from feature geometry
Add force elements like gears, pulleys or couplings for simple load definition
Materials, bearings, lubricants databases
Automatic identification of critical sections

Configurations

Single shaft or coaxial shaft systems
Static deformation, modal analysis
General supports or rolling element bearings, pilot bearings, internal bearings
Linear or non-linear calculation with Euler or Timoshenko beam model considering temperature effects

Strength rating

Strength rating along DIN 743, FKM guideline, Hänchen & Decker or AGMA 6101
For static and fatigue strength, for single load case or load spectrum
Using material database or own definition for S-N curve, different Miner rules
Independent load factors and stress ratios for static and fatigue rating

Modal and forced response analysis

Modal analysis
Forced response analysis, with damping
Considers bearing stiffness

Deformation and stiffness calculation

Non-linear bearing stiffness is calculated based on inner bearing geometry
Housing deformation, machining errors and similar may be defined as initial bearing offset
Any number of loads may be added

Tooth trace calculation

Calculation of shaft deformation of pinion shaft, calculation of necessary lead modification
Housing stiffness, bearing stiffness and shaft stiffness may be considered

Bearings

Configuration

Calculation of single bearing or bearing-shaft system, any number of bearings in system
With single load or load spectrum
Sizing function for bearing selection

Bearing life rating

Basic rating using load capacity numbers
Modified rating considering lubricant properties
Reference rating considering load distribution
Modified reference rating
Along ISO 281, ISO/TS 16281, ISO 76

Bearing stiffness and clearance

Based on bearing inner geometry
Shaft-bearing interaction for shaft and bearing systems
Considers operating clearance / pre-tension
Considers bearing, shaft, hub tolerances

Load distribution calculation

Load distribution among rolling elements
Contact stresses for balls
Contact stresses for rollers, considering roller geometry modification (logarithmic)
Contact stress distribution on raceway

Thermal rating

Along DIN 732

Bearing database

Bearing data from different bearing suppliers
For different bearing types
Basic bearing properties
Bearing inner geometry, user editable
Separate database for lubricants, lubricant purity definitions along ISO 4406

Hydrodynamic bearings

Axial bearings DIN 31653, ISO 12130, DIN 31654

Bearing designer

Sizing function for bearing inner geometry
Define ranges e.g., for rolling element diameter, pitch diameter, no. of rolling elements and others
Software calculates possible bearing designs
For each design, load capacity and properties of inner geometry are calculated
Allows for specific, optimized design of bearings, in particular slewing bearings

Load distribution with elastic rings