기어리스 권상기의 동역학 기반 NVH 특성분석과 실험 검증에 관한 연구

초록

Recently, the adoption of gearless traction machines has been expanding in the elevator industry to enhance energy efficiency and minimize maintenance. This study analyzes the dynamic behavior and vibration-acoustic characteristics of a gearless traction machine for a 17-person, 2.6 m/s high-speed elevator using Multi-body Dynamics (MBD) analysis. The system was modeled using RecurDyn, with the housing and shaft converted into flexible bodies for Modal Analysis. Additionally, a Campbell Diagram analysis was performed to identify potential resonance between the Gear Mesh Frequency (GMF) and the system's natural frequencies, while Equivalent Radiated Power (ERP) analysis was conducted to predict radiated noise. The results confirmed that resonance between the GMF component and the housing's natural frequency could occur in a specific RPM range. Consequently, bearing selection and design guidelines are presented to mitigate these vibration and noise issues.

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