======= Bearing ======= Bearings are a special case of elastic joints. They implement a coupling between the source and target interface with linear elasticity and viscous damping properties. ---------- Definition ---------- Source and target interfaces should be chosen as shown in following figure: .. image:: media/lp_bearing.png :alt: Bearing link definition :scale: 100 % ^^^^^^^^^^^^^^^^^^^^ Source interface ^^^^^^^^^^^^^^^^^^^^ ============== =========================================================================================== Type Stationary interface (6dof) Topologies Inner ring surface at the shaft Location Center of action u direction Axial, along the rotational axis v direction Radial w direction Radial ============== =========================================================================================== ^^^^^^^^^^^^^^^^^^^^ Target interface ^^^^^^^^^^^^^^^^^^^^ ============== =========================================================================================== Type Stationary interface (6dof) Topologies Outer ring surface at the housing Location Center of action u direction Axial, along the rotational axis v direction Radial w direction Radial ============== =========================================================================================== ^^^^^^^^^^^^^^^^^^^^^^^^^ Recommended link settings ^^^^^^^^^^^^^^^^^^^^^^^^^ ========================== ========================== Use ground for source unchecked Location master either source or target Orientation master either source or target ========================== ========================== ---------- Parameters ---------- ^^^^^^^^^ Stiffness ^^^^^^^^^ =================== ========= ======================================================== Parameter Unit Description =================== ========= ======================================================== Axial (u) N/m Axial stiffness Radial (v) N/m Transversal stiffness Radial (w) N/m Normal stiffness Rotational (ru) Nm/rad Rotational stiffness (usually zero for bearings) Tilt (rv) Nm/rad Tilting stiffness Tilt (rw) Nm/rad Tilting stiffness =================== ========= ======================================================== ^^^^^^^^^ Damping ^^^^^^^^^ =================== ========= ======================================================== Parameter Unit Description =================== ========= ======================================================== Axial (u) Ns/m Axial damping Radial (v) Ns/m Transversal damping Radial (w) Ns/m Normal damping Rotational (ru) Nsm/rad Rotational damping Tilt (rv) Nsm/rad Tilting damping Tilt (rw) Nsm/rad Tilting damping =================== ========= ========================================================