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http://dx.doi.org/10.14775/ksmpe.2019.18.6.045

Analysis of the PTO Driveline Rattle Noise on an Agricultural Tractor  

Ahn, Da-Vin (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University)
Shin, In-Kyung (Daedong Industrial Co., Ltd, R&D Center)
Han, Hyun-Woo (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University)
Son, Gwan-Hee (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University)
Park, Young-Jun (Department of Biosystems and Biomaterials Science and Engineering, Seoul National University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.18, no.6, 2019 , pp. 45-54 More about this Journal
Abstract
In this study, we analyze the rattle noise of a power takeoff (PTO) driveline and develop a PTO driveline resonance model. We measured the rattle noise of the PTO driveline on the output shaft and, by analyzing the rattle noise in the time domain, we determine that the engine expansion stroke period matches the sound pressure of rattle noise. This finding helped us demonstrate that the rattle noise is caused by the collision between the PTO driving gear and the gear driven by the engine expansion stroke; the torsional vibration caused by this collision is affected by the angular velocity fluctuation of the PTO drive shaft. By measuring the angular velocity of the PTO drive shaft, we confirm that the angular velocity fluctuation of the engine flywheel tends to excessively amplify the PTO drive shaft angular velocity fluctuation. We conclude that the resonance, which occurs when the operating frequency of the engine is close to the natural frequency of the tractor power transmission system, causes the excessive angular velocity fluctuation of the PTO drive shaft. We performed a modal analysis of the PTO driveline resonance and, using the characteristic equation, we show that the resonance occurs when the engine rotation speed is close to 850 rpm, which matches the natural frequency of the PTO driveline.
Keywords
Rattle Noise; PTO Driveline; Tractor; Torsional Vibration; Simulation Model; Resonance;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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