Adams Car Package > Shared Material > Appendix > Three-Phase Gear Force

Three-Phase Gear Force

The three-phase gear force represents a force coupling two gear elements. The force is computed at the pitch circle considering the pressure (tooth) angle, as well as the helix angle. This force is then resolved to the appropriate forces and moments applied at the center of one gear, with the reaction force applied at the other gear. See Contact Force Formulation Based on Oilfilm Thickness Theory for more information.
The gear force lets you model gear interaction with backlash. When creating the gear force, the gears are rotated automatically to ensure proper meshing of the gears. In addition to the GFORCE, your template-based product creates an inplane joint primitive at the idealized point of contact with its normal tangential to the pitch circle. The inplane joint primitive is only active during the initial condition Analysis phase of a Simulation. This will ensure that the initial conditions (displacement, velocity, and accelerations) of the gears are calculated appropriately.
This component allows you to model helical and spur gear forces, where the centers of the gears are not fixed in space and the mesh frequency is considered.
The component outputs the following results:
total_force - Total force, same as normal_force since friction is not included in the gear force.
normal_force - Resulting force normal to the gear tooth surface.
tangential_force - Resulting force tangential to the gear pitch circle.
axial_force - Resulting force in axial direction, zero if gears are straight.
torque_g1 - Resulting torque applied to Gear 1 at the i-marker location.
torque_g2 - Resulting torque applied to Gear 2 at the j-marker location.