Download: AVL White Paper – Predictive Transmission NVH Analysis for ICE Based and Electrified Powertrains

Multi-Body Dynamics simulation enables the optimization of the acoustic behavior of powertrain components. It supports calculation engineers in detecting Noise, Vibration and Harshness (NVH) problems and realizing respective improvements at an early stage in the development process. As a consequence, significantly fewer prototypes are required and development time and cost can be reduced. The electrification of powertrains brings new opportunities, but also new challenges for the NVH analysis engineer.

A vast variety of new transmission and drive concepts have been introduced in the recent past. These include dual clutch transmission, automatic transmission or continuously variable transmission, as well as electric drives or hybrids. The more and more stringent legal requirements regarding emissions, such as the EU 2020 CO2 fleet emission target of 95g/km and the 2030targets for new cars to emit 37.5 percent less carbon dioxide compared to 2021 levels, have been an important market driver. Since measures which improve efficiency may negatively impact the acoustic behavior, OEMs are challenged to optimize NVH attributes while at the same time keeping an eye on emissions and efficiency targets.

This White Paper demonstrates how simulation methodologies can be applied to optimize key powertrain NVH attributes, extending classical IC engine NVH to modern powertrains including highly complex transmissions and electrified powertrains (EV/HEV).