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基于变分模态分解的助推系统振动特性研究
Study on vibration characteristics of boost system based on variational mode decomposition
- DOI:
- 作者:
- 黄慎顺, 段浩, 廖长江
HUANG Shen-shun, DUAN Hao, LIAO Chang-jiang
- 作者单位:
- 中国船舶集团有限公司 第七〇五研究所昆明分部, 云南 昆明 650106
Kunming Branch of the 705 Research Institute of CSSC, Kunming 650106, China
- 关键词:
- 变分模态分解;时频特性;传递特性;振动源;振动贡献度
variational mode decomposition(VMD); time-frequency characteristic; transfer characteristic; vibration source; vibration contribution
- 摘要:
- 助推系统助推器材时的振动性能对水下航行器安全性等有重大影响，对助推系统振动特性进行研究可以为系统减振降噪设计和系统振动性能评估提供依据。以助推系统为研究对象，首先对变分模态分解方法进行仿真，证明该方法在非平稳信号时频分析中的有效性，仿真结果最大误差为3%。然后将该方法应用于3组实测振动信号的分析。基于所得到的振动信号时频分布，对助推系统振动源的构成情况、振动传递特性进行研究。研究结果表明，系统低频振动源为旋转机械1以及航行器器壁，其中器壁对低频振动贡献度较大。振动传递过程中高频信号衰减速度较快。不同的助推压力对各子系统振动信号的分布没有根本性的影响，在不同工况下最强振动频率值相差10～846 Hz。
The vibration performance of the boost system has great influence on the security and other aspects of underwater vehicle. The research of boost system vibration characteristics can provide a basis for system vibration and noise reduction design and vibration performance evaluation of the system. Research is conducted on the boost system, the effectiveness of the vibrational mode decomposition method in time-frequency analysis of nonstationary signal is verified by simulation and the maximum error value is 3%. Then the method is applied to the analysis of three groups of measured vibration signals. Based on the time-frequency distribution of vibration signals, the vibration source composition and transmission characteristics of the boost system are studied. The results show that the low frequency vibration sources of the system are the rotating machinery 1 and the vehicle wall, and the vehicle wall contributes more to the low frequency vibration. In the process of vibration transmission, high frequency signal attenuation speed is fast. Different boost pressures have no fundamental impact on the time-frequency distribution of vibration signals of each subsystem, and the strongest vibration frequency values differ by 10～846 Hz under different working conditions.
2023,45(7): 52-57 收稿日期：2023-01-17
DOI：10.3404/j.issn.1672-7649.2023.07.011
分类号：U664
作者简介：黄慎顺(1997-),男,硕士研究生,研究方向为助推技术
