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Damage detection method in complicated beams with varying flexural stiffness

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Abstract

A damage detection method for complicated beam-like structures is proposed based on the subsection strain energy method (SSEM), and its applicability condition is introduced. For a beam with the continuously varying flexural stiffness and an edge crack, the SSEM is used to detect the crack location effectively by numerical modal shapes. As a complicated beam, the glass fiber-reinforced composite model of a wind turbine blade is studied based on an experimental modal analysis. The SSEM is used to calculate the damage index from the measured modal parameters and locate the damage position in the blade model successfully. The results indicate that the SSEM based on the modal shapes can be used to detect the damages in complicated beams or beam-like structures for engineering applications.

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Authors and Affiliations

  1. Department of Mechanics and Aerospace Engineering, State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing, 100871, P. R. China

    Kan Feng  (冯 侃), Zheng Li  (励 争), Gui-yun Gao  (高桂云) & Xian-yue Su  (苏先樾)

Authors
  1. Kan Feng  (冯 侃)
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  2. Zheng Li  (励 争)
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  3. Gui-yun Gao  (高桂云)
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  4. Xian-yue Su  (苏先樾)
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Corresponding author

Correspondence to Zheng Li  (励 争).

Additional information

Communicated by Wen-rui HU

Project supported by theNational Basic Research Program of China (973 Program)(No. 2007CB714603)

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Feng, K., Li, Z., Gao, Gy. et al. Damage detection method in complicated beams with varying flexural stiffness. Appl. Math. Mech.-Engl. Ed. 32, 469–478 (2011). https://doi.org/10.1007/s10483-011-1431-x

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  • DOI: https://doi.org/10.1007/s10483-011-1431-x

Key words

Chinese Library Classification

2010 Mathematics Subject Classification

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