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Automatic identification method of structural statistical energy analysis subsystem
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Qiang CHEN1, 2, Yongjun DING2, Dahai ZHANG1, 2, Qingguo FEI1, 2
Journal of Vibration Engineering | 2025, 38(7) : 1465 - 1473
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Journal of Vibration Engineering | 2025, 38(7): 1465-1473
Automatic identification method of structural statistical energy analysis subsystem
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Qiang CHEN1, 2, Yongjun DING2, Dahai ZHANG1, 2, Qingguo FEI1, 2
Affiliations
  • 1.School of Mechanical Engineering，Southeast University，Nanjing 211189，China
  • 2.Key Laboratory of Structure and Thermal Protection for High-Speed Aircraft，Ministry of Education，Nanjing 211189，China
Published: 2025-07-10 doi: 10.16385/j.cnki.issn.1004-4523.202306058
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Statistical energy analysis （SEA） is a widely used method for analyzing the high-frequency dynamic response of mechanical structures. The reasonable division of subsystems is one of the critical basises for SEA. In this paper，an automatic identification method of SEA subsystem based on order-reduced modal energy density and hierarchical cluster analysis is developed. First，the structural modal energy densities in the high-frequency band are obtained through the discrete finite element model. Then，the main features of the modal energies are extracted through the proper orthogonal decomposition. The similarity of the modal energy density between different elements is analyzed by hierarchical cluster analysis. Finally，the number of statistical energy analysis subsystems and the corresponding structural elements are identified. The T-shaped plates，I-shaped plates，and engine combustion chamber are taken as simulation models to verify the effectiveness of the proposed method. Simulation results show that the coupling relationship between components，the number of subsystems，and corresponding elements can be automatically identified by the proposed method. Then，the SEA model can be established efficiently and accurately.

statistical energy analysis （SEA）  /  modal energy  /  subsystem identification  /  hierarchical cluster analysis  /  proper orthogonal decomposition
Qiang CHEN, Yongjun DING, Dahai ZHANG, Qingguo FEI. Automatic identification method of structural statistical energy analysis subsystem[J]. Journal of Vibration Engineering, 2025 , 38 (7) : 1465 -1473 . DOI: 10.16385/j.cnki.issn.1004-4523.202306058
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Year 2025 volume 38 Issue 7
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Article Info
doi: 10.16385/j.cnki.issn.1004-4523.202306058
  • Receive Date：2023-06-27
  • Online Date：2026-02-09
  • Published：2025-07-10
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History
  • Received：2023-06-27
  • Revised：2023-10-23
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    1.School of Mechanical Engineering，Southeast University，Nanjing 211189，China
    2.Key Laboratory of Structure and Thermal Protection for High-Speed Aircraft，Ministry of Education，Nanjing 211189，China
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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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