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Application of iterative singular value method in mode seperation and reconstruction of mechanical structure
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Zhi-jun LUO1, 2, Gui TIAN3, Shao-ze YAN1
Journal of Vibration Engineering | 2024, 37(2) : 210 - 217
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Journal of Vibration Engineering | 2024, 37(2): 210-217
Application of iterative singular value method in mode seperation and reconstruction of mechanical structure
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Zhi-jun LUO1, 2, Gui TIAN3, Shao-ze YAN1
Affiliations
  • 1State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
  • 2PhD Innovation Workstation of Unit 96963 of China People’s Liberation Army, Beijing 100084, China
  • 3Department of Avionics and Weapon Engineering, Army Aviation Institute, Beijing 101123, China
Published: 2024-02-28 doi: 10.16385/j.cnki.issn.1004-4523.2024.02.003
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Complex multi-mode signals can be decomposed into single mode components using time-frequency decomposition technology. This allows for the use of a simple and reliable single mode identification method to identify the complex modal signals of mechanical structure. Empirical wavelet transform (EWT) method can effectively decompose the modes, and some revised methods even can overcome the strong noise. However, when reconstructing the modes, the reconstructed mode could be distorted due to overlapping filters and closely spaced components. Focusing on the problem of mode decomposition and reconstruction, this paper analyzes the problem of distorted reconstructed mode of EWT method, proposes a revised method based on the Iterative Truncated Singular Value Decomposition (ITSVD) method, and applies this new method to both the synthesis signal and the experimental signal from the vibration response of a mechanical structure model with a joint surface. The results suggest that the proposed ITSVD-EWT method is more effective in mode decompose and reconstruction.

parameter identification  /  empirical mode decomposition  /  mechanical structure  /  empirical wavelet transform  /  iterative truncated singular value decomposition
Zhi-jun LUO, Gui TIAN, Shao-ze YAN. Application of iterative singular value method in mode seperation and reconstruction of mechanical structure[J]. Journal of Vibration Engineering, 2024 , 37 (2) : 210 -217 . DOI: 10.16385/j.cnki.issn.1004-4523.2024.02.003
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Year 2024 volume 37 Issue 2
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.2024.02.003
  • Receive Date：2022-05-23
  • Online Date：2026-02-10
  • Published：2024-02-28
Article Data
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History
  • Received：2022-05-23
  • Revised：2022-09-18
Funding
Affiliations
    1State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
    2PhD Innovation Workstation of Unit 96963 of China People’s Liberation Army, Beijing 100084, China
    3Department of Avionics and Weapon Engineering, Army Aviation Institute, Beijing 101123, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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