Abstract: Transmission error generated in the gears leads to the whine noise which can result in to the undesirable accoustic performance of the gearbox. Determination of vibro-acoustic behavior of such a component at the early stages of design can result in developing an acoustically sound gearbox. The SEA provides a better analytical solution for such a problem over the FEM and other deterministic method. The statistical approach eliminates the possibility of uncertainty in the results. The main focus in the SEA modeling of the complex system is to find out the loss factors. This paper discuss the method for the determination of loss factors which can be used to study the vibro-acoustic behavior of the geared rotor system.

Keywords: Statistical Energy Analysis (SEA), Vibroaccoustic, Gearbox, Loss Factor.