Reduction of helicopter cabin noise using periodic isolation design

被引：0
作者：
Song Y.-B. [1 ]
Li Z.-C. [1 ]
Huang B. [1 ]
Yu D.-L. [2 ]
Wen J.-H. [2 ]
机构：
[1] Laboratory of Aerodynamic Noise Control, China Aerodynamics Research and Development Center, Mianyang
[2] Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2020年 / 33卷 / 04期
关键词：
Cabin noise; Helicopter; Noise control; Periodic structure;
D O I：
10.16385/j.cnki.issn.1004-4523.2020.04.015
中图分类号：
学科分类号：
摘要：
The noise level inside modern helicopter cabins has become one of the major indices to evaluate its performance. The noise transfer path control is an important approach to reduce the noise in cabin. Gearbox struts are one of the key transfer paths for the noise and vibration inside helicopter cabin. Based on the periodic theory, the isolation structure for gearbox vibration is designed, and the reduction of the cabin noise is studied. Firstly, two types of periodic isolation structures are designed. A single layer vibration isolation system and a simplified cabin model which is considered as a closed cavity are built. Next, the vibration and sound properties of the periodic isolation structure are analyzed and compared. The effect of periodic design on the vibration transmission of the isolation structure, the vibration and noise of the single layer isolation system and the cabin are studied. The numerical results demonstrate that the vibration and noise of these structures are effectively suppressed by periodic design. In addition, via the optimal design of the periodic structure, the vibration and noise can be reduced more, while the added mass is not increased. © 2020, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
引用
收藏
页码：764 / 771
页数：7
相关论文
共 22 条
  • [1] Edwards B, Cox C., Revolutionary Concepts for Helicopter Noise Reduction: SILENT Program, (2002)
  • [2] Lu L, Wang J., Technology of helicopter noise control, The 16th Annual Meeting of Helicopter Technology, (2010)
  • [3] Coy J J, Handschuh R F, Lewicki D G, Et al., Identification and proposed control of helicopter transmission noise at the source, NASA/Army Rotorcraft Technology Conference, (1987)
  • [4] Liu Y, Xu X, Wang Y, Et al., Development of thermal and noise environment control system in ambulance helicopter, Chinese Medical Equipment Journal, 34, 8, pp. 84-87, (2013)
  • [5] Lepage A, Mortain F, Coste L., Active structural acoustic control of a helicopter trim panel, The 2005 Congress and Exposition on Noise Control Engineering, (2005)
  • [6] Yu H, Sun D, Li M, Et al., Cabin noise control process of a helicopter, Helicopter Technique, 4, pp. 38-44, (2012)
  • [7] Liu X, Xu X, Bai S, Et al., Vibration and noise control technology on military helicopter, Helicopter Technique, 1, pp. 67-72, (2013)
  • [8] Hoffmann F, Maier R, Janker P, Et al., Helicopter interior noise reduction by using active gearbox struts, 12th AIAA/CEAS Aeroacoustics Conference, (2006)
  • [9] Szefi J T, Smith E C, Lesieutre G A., Design and analysis of high-frequency periodically layered isolators for helicopter gearbox isolation, 41st AIAA Structures, Structural Dynamics and Materials Conference, (2003)
  • [10] Hen F L, Smith E C, Lesieutre G A, Et al., Actively-enhanced periodically-layered mount for helicopter gearbox isolation, 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, (2005)
123