This webinar will focus on the NVH performance in the detailed design phase of an e-drive based on an industrial use case. Loads from a CAD based EM simulation will be included in a system level multibody simulation of the complete e-drive.

With the trend towards electrification, as well as the reduced cycles of design, engineers are faced with many new challenges. Tonal noise such as motor whine and gear whine is more prominent for an electric drive (e-drive) powertrain in Hybrid Electric Vehicles (HEV) or Electric Vehicles (EV). This is because the ICE is not there anymore to mask this tonal noise. The source of the motor whine is the motor electromagnetic forces, whereas the gear whine originates mainly from the variation of stiffness during the meshing cycle, which is defined by the gear geometry and by the contact behaviour between gear teeth. Structural response of the powertrain to these excitations can result in excessive noise which can negatively affect customer satisfaction.

Addressing motor whine and gear whine requires a deep understanding of both the electrical and mechanical systems that capture the stiffness of the assembly, EM excitation, gear micro geometry, stiffness of light weighted gears, bearing clearances, bearing preload, etc. This requires a robust system level NVH approach that is not yet well established for e-drive modules as compared to ICE engines.

This webinar will focus on the NVH performance in the detailed design phase of an e-drive based on an industrial use case. Loads from a CAD based EM simulation will be included in a system level multibody simulation of the complete e-drive. Multibody simulation allows the engineer to consider both loading conditions as system compliances (from the bearing, flexible shafts, housing, etc.) onto the gear contact detection. Moreover, using high fidelity methods for gear contact, the engineer can investigate the influence of microgeometry modifications and custom gear blank designs on the NVH performance. Finally, the loads from the multibody simulation will be used to perform a vibro-acoustic simulation to understand the radiated acoustic power from the e-drive.

Being a company that has both simulation as test solutions, special attention will go to the structural analysis, testing, model updating and correlation process of the housing assembly. A validated housing assembly gives further confidence in interpreting results from downstream multibody and vibroacoustic simulations.

About the Speaker:


Jonas Verhoogen – Product Manager – Siemens Digital Industries Software

Jonas specializes in Simcenter 3D based solutions relating to Drivetrain and Transmission applications within the Automotive and Aerospace industries. Jonas has global responsibility for nonlinear time domain solutions for multibody dynamics and works from the Leuven, Belgium office.


Korcan Kucukcoskun – Product Manager – Siemens Digital Industries Software

Korcan is Product Manager for Simcenter 3D Acoustics simulation solutions focusing on Acoustics, Vibro-Acoustics and Aeroacoustics applications for multi-physics problems.

This webinar is sponsored by Siemens Digital Industries Software.