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Identification and verification of half cosine basis function impact load of cantilever beam structure
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Ying WANG1, Xiaoli MA2, Qiang WANG3
Chinese Journal of Construction Machinery | 2025, 23(2) : 351 - 355
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Chinese Journal of Construction Machinery | 2025, 23(2): 351-355
• Performance Mensuration, Experimentation and Fault Diagnosis •
Identification and verification of half cosine basis function impact load of cantilever beam structure
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Ying WANG1, Xiaoli MA2, Qiang WANG3
Affiliations
  • 1. Department of Engineering Management, Henan Vocational and Technical College of Architecture, Zhengzhou 450000, Henan, China
  • 2. College of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450000, Henan, China
  • 3. Henan Feigong Heavy Machinery Manufacturing Co., Ltd., Zhengzhou 450064, Henan, China
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It is also necessary to consider the impact damage, the loosening of components and the vibration of the structure caused by the impact load factors in the study of the vibration state of the equipment. In this paper, an impact load identification algorithm based on half cosine function is designed. The proper interval is determined by genetic algorithm, and the dimensions of beams, thin plates and trusses are determined by data method. The numerical simulation results show that the error of SCFF fitting method is lower than that of Tikhonov and Chebyshev orthogonal polynomial fitting (COPF), and the SCFF recognition advantage is more obvious with the increase of noise. The peak error of less than 10% is obtained, and the minimum value is reached under the parameter optimization, which indicates that the parameter optimization has good applicability. The test results show that the low-frequency vibration state of the cantilever beam caused by the impact load is inferred by analyzing the spectrum data of the response signal, and the correction of the model by the first four modes meets the feasibility requirements. When the SCFF method is used for identification, it can form a good agreement with the actual load and obtain a smaller peak error.

impact load  /  cantilever beam  /  load identification  /  function fitting  /  genetic algorithm
Ying WANG, Xiaoli MA, Qiang WANG. Identification and verification of half cosine basis function impact load of cantilever beam structure[J]. Chinese Journal of Construction Machinery, 2025 , 23 (2) : 351 -355 .
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Year 2025 volume 23 Issue 2
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  • Online Date：2025-12-16
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    1. Department of Engineering Management, Henan Vocational and Technical College of Architecture, Zhengzhou 450000, Henan, China
    2. College of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450000, Henan, China
    3. Henan Feigong Heavy Machinery Manufacturing Co., Ltd., Zhengzhou 450064, Henan, China
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