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A Multi-Physics Approach to Predict High Frequency NVH in Oil Pump Drives Gamma Technologies LLC
- Format:
- Book
- Conference/Event
- Author/Creator:
- Foraste Gomez, Llorenc, author.
- Conference Name:
- Noise and Vibration Conference & Exhibition (2021-09-07 : Grand Rapids & Online, Michigan, United States)
- Language:
- English
- Physical Description:
- 1 online resource cm
- Place of Publication:
- Warrendale, PA SAE International 2021
- Summary:
- NVH problems are often the result of mechanisms that originate through complex interactions between different physical domains (flow, structural/mechanical, control logic, et cetera). Parallel-shaft spur gears subject to light torque loading caused by the dynamic pressure fluctuation of the oil used in engine accessory or transmission pump drives are likely to exhibit unusual gear whine associated with higher order meshing harmonics, even when the tooth profile has a high-quality grade finishing. Therefore, accurate integrated models are becoming a requirement to solve modern NVH problems. The CAE methods used to predict the high vibration of such components are often aimed at calculating transmission error excitation using a static contact simulation approach with a prescribed flow forcing function taken from a quasi-steady CFD analysis, which typically results in underpredicting the contact dynamic response leading to wrong upfront design decision-making and underestimating component durability. Combining the optimal balance between simulation and experimental data, this article describes a joint effort between Ford and Gamma Technologies to develop a general methodology to perform an integrated multi-physics NVH analysis in order to predict higher frequency vibration induced in gear-driven oil pumps. This new method suggests a predictive time-domain non-linear contact dynamic analysis of the gear mesh subject to the transient oil pressure force fluctuation accounting for the effects of gear tilt, translational misalignment due to shaft bending and bearing clearances, sliding friction or sudden oil pressure drops due to cavitation
- Notes:
- Vendor supplied data
- Publisher Number:
- 2021-01-1099
- Access Restriction:
- Restricted for use by site license
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