Abstract
In order to solve the problem of radiation noise of helicopter reducer with symmetrical structure, a simulation method is proposed to predict the noise of gearbox of a helicopter reducer from steady dynamic response to the acoustic radiation calculation. Primarily, taking the influence of time-varying stiffness into consideration, the lumped mass model of gear-rotor-bearing system is established. The dynamic load of transmission system is solved by New-Mark-β method, which is regarded as excitation of the gearbox. Then finite element model of housing is established, the radiated noise of the housing is predict by finite element and boundary element method, the influence of multi-source excitation on the radiated noise of the gearbox is analyzed. Finally, the radiated noise of the reducer under different working conditions is explored. All conclusions of this research could provide theoretical reference for vibration and noise reduction of helicopter reducer.
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Acknowledgments
This work was supported by the National Key Laboratory of Science and Technology on Helicopter Transmission (Grant No. HTL-O-21G01), the Xinjiang Province key research and development (Grant No.2021B01003-1), and the Natural Science Foundation of Xinjiang Province (Grant No.2021D01 C050, 2021D01C103).
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Jingqi Zhang was born in Henan, China, in 1998. He is currently pursuing the master degree with the Academy for Mechanical Engineering, Xinjiang University, Xinjiang, China. Since 2021, he has been working on gear system dynamics.
Jianxing Zhou was born in Xinjiang, China, in 1982. He received the Ph.D. degree in mechanical engineering from Northwestern Polytechnical University, Xi’an, China, in 2013. From 2013 to 2018, he was an Assistant Professor with the College of Mechanical Engineering. Since 2019, he has been a Professor with the College of Mechanical Engineering, Xinjiang University.
Shengnan Wang was born in Henan, China, in 1992. She is currently pursuing the Ph.D. degree with the Academy for Mechanical Engineering, Xinjiang University, Xinjiang, China. Since 2017, she has been working on gear system dynamics. Her current research interests include gear system dynamics, vibration and noise.
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Zhang, J., Zhou, J., Wang, S. et al. Research on dynamic characteristics and radiation noise of a helicopter main reducer based on finite element and boundary element method. J Mech Sci Technol 37, 4489–4505 (2023). https://doi.org/10.1007/s12206-023-0807-9
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DOI: https://doi.org/10.1007/s12206-023-0807-9