CAI is the name of the inventor of a broadly used method for gear contact stiffness calculation. Methods are detailed in references mentioned in the on-line documentation.
The Gear contact calculation method Analytical ISO + CAI is presented in Simcenter 3D Motion documentation, within the Transmission Builder section. Download Simcenter 3D Motion Gear Element user Guide - URL below.
CAI is the name of the inventor and author of publications  and .
Siemens cannot send copies of those publications due to Copyright.