This presentation provides a comprehensive overview of the key technologies and engineering methodologies for Electric Vehicle (EV) NVH (Noise, Vibration, and Harshness) development. The transition from Internal Combustion Engine (ICE) vehicles to EVs introduces paradigm shifts in vehicle architecture, demanding novel NVH strategies. The report systematically addresses five critical domains:(1) Architectural Challenges: Analyzing the impact of heavy battery packs, component layouts (e.g., E-compressors), and lightweight body materials (Aluminum, CFRP) on Sound Transmission Loss (STL) and the mass law.(2) EV Sound Characteristics: Detailing the absence of ICE masking effects, the prominence of high-frequency tonal noises (motor/pole orders), sound quality evaluation, and Pedestrian Acoustic Vehicle Alerting Systems (AVAS).(3) Acoustic Package Optimization: Emphasizing pass-through leakage control at the firewall and simulation-driven refinement (e.g., VA-One).(4) E-Motor and Gearbox NVH: Outlining advanced simulation workflows, including 2D/3D electromagnetic-to-structural mapping, spatial-frequency Fourier transforms for excitation analysis, and gear micro-geometry optimization via Monte-Carlo simulations.(5) Wind Noise Management: Highlighting the critical role of flush/gap (DTS) control, panel stiffness (oil canning prevention), and Body-in-White (BIW) sealing in the absence of powertrain masking. Note: This document is an updated archival version (2026) of the original presentation delivered in October 2019, with references updated to reflect their final publication status.
Xueying Xu (Mon,) studied this question.
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