复合材料整流罩减振降噪的动力吸振器设计

李航行; 胡迪科; 吴邵庆

doi:10.7527/S1000-6893.2021.25249

航空学报 >

2022 , Vol. 43 >Issue 5: 225249 - 225249

DOI: https://doi.org/10.7527/S1000-6893.2021.25249

固体力学与飞行器总体设计

复合材料整流罩减振降噪的动力吸振器设计

李航行 ,
胡迪科 ,
吴邵庆

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1. 东南大学工程力学系, 南京 211189;
2. 上海宇航系统工程研究所, 上海 201109;
3. 东南大学江苏省空天机械装备工程研究中心, 南京 211189

收稿日期: 2021-01-11

修回日期: 2021-02-21

网络出版日期: 2021-02-24

基金资助

江苏省优秀青年基金（BK20180062）；江苏省"六大人才高峰"高层次人才项目（B类）（KTHY-005）；上海航天科技创新基金（SAST2018-025）

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Optimization design of dynamic vibration absorbers for vibration and noise reduction of composite fairing

LI Hangxing ,
HU Dike ,
WU Shaoqing

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1. Department of Engineering Mechanics, Southeast University, Nanjing 211189, China;
2. Aerospace System Engineering Shanghai, Shanghai 201109, China;
3. Jiangsu Engineering Research Center of Aerospace Machinery, Southeast University, Nanjing 211189, China

Received date: 2021-01-11

Revised date: 2021-02-21

Online published: 2021-02-24

Supported by

Jiangsu Excellent Youth Fund (BK20180062); Jiangsu Province "Six Talent Peaks" High-level Talent Project (B Type)(KTHY-005); Shanghai Aerospace Science and Technology Innovation Fund (SAST2018-025)

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摘要

运载火箭整流罩的隔声性能设计对内部设备的选型、试验和安全运行至关重要。为改善整流罩内低频声振环境，提高整流罩低频段隔声性能，首先，针对复合材料整流罩结构开展力学等效建模；其次，提出一种基于基变换模态空间内降维理论，解决了考虑多模态耦合的动力吸振器（DVA）设计问题；最后，基于整流罩等效力学模型开展了动力吸振器位置及材料参数的优化设计。针对某型复合材料整流罩开展仿真研究，验证新方法的有效性。结果表明：针对某型质量为1 177.3 kg的整流罩模型，添加总质量为14.6 kg的动力吸振器之后，0~100 Hz频段内声功率级均方根（RMS）值从254.8 dB降至238.8 dB，设计频段内声振响应被有效控制，声振环境得到改善。

关键词： 火箭整流罩; 纸蜂窝板; 动力吸振器; 耦合模态; 减振降噪; 降维理论

本文引用格式

李航行 , 胡迪科 , 吴邵庆 . 复合材料整流罩减振降噪的动力吸振器设计[J]. 航空学报, 2022 , 43(5) : 225249 -225249 . DOI: 10.7527/S1000-6893.2021.25249

Abstract

The sound insulation design of the fairing on rockets is important for the model selection, tests and safe operation of the internal equipment. To improve the vibro-acoustic environment and the sound insulation performance of the fairing, we first conduct the equivalent mechanical modelling of the composite fairing. Then, based on the basis changes, the dimension reduction method is proposed in the modal space to optimize the Dynamic Vibration Absorber (DVA) by considering the coupled modes. Finally, the optimization design for the location and material parameters of dynamic vibration absorbers is performed based on the equivalent mechanical modelling of the fairing. Numerical simulations are conducted on a composite fairing to verify the proposed method. Results of the fairing with a total mass of 1 177.3 kg show that under the constraint of the additional mass, the Root Mean Square (RMS) value of the sound power level in the frequency band 0-100 Hz is reduced from 254.8 dB to 238.8 dB after the addition of the dynamic vibration absorbers with a total mass of 14.6 kg. The vibration and noise level in the designed frequency band is significantly reduced and the vibro-acoustic environment is improved.

Key words： rocket fairing; paper honeycomb panel; dynamic vibration absorber; coupled modes; vibration and noise reduction; dimension reduction method

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