Damage Detection Method in Complicated Beams With Varying Flexural Stiffness

FENG Kan; LI Zheng; GAO Gui-yun; SU Xian-yue

doi:10.3879/j.issn.1000-0887.2011.04.007

Volume 32 Issue 4

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Article Navigation > Applied Mathematics and Mechanics > 2011 > 32(4): 445-454

FENG Kan, LI Zheng, GAO Gui-yun, SU Xian-yue. Damage Detection Method in Complicated Beams With Varying Flexural Stiffness[J]. Applied Mathematics and Mechanics, 2011, 32(4): 445-454. doi: 10.3879/j.issn.1000-0887.2011.04.007

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Damage Detection Method in Complicated Beams With Varying Flexural Stiffness

doi: 10.3879/j.issn.1000-0887.2011.04.007

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

Received Date: 2011-01-25
Rev Recd Date: 2011-02-21
Publish Date: 2011-04-15

Abstract

Abstract

A damage detection method for complicated beam-like structures was proposed based on the subsection strain energy method (SSEM),and its applicable condition was introduced.For a beam with continuously varying flexural stiffness and an edge crack,the SSEM was applied 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 was studied by an experimental modal analysis.The SSEM was used to calculate the damage index from the measured modal parameters,and to 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 damage in complicated beams or beam-like structures in engineering applications.
- non-destructive testing,
- modal strain energy,
- varying flexural stiffness beam,
- fiber reinforced composite material,
- wind turbine blade

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References(8)

References

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