变刚度复杂梁结构损伤检测方法研究

冯侃; 励争; 高桂云; 苏先樾

doi:10.3879/j.issn.1000-0887.2011.04.007

变刚度复杂梁结构损伤检测方法研究

doi: 10.3879/j.issn.1000-0887.2011.04.007

北京大学工学院力学与空天技术系,湍流与复杂系统国家重点实验室,北京 100871

基金项目: 国家重点基础研究发展计划(973计划)资助项目(2007CB714603)

详细信息

作者简介:
冯侃(1985- ),男,江苏人,博士生(E-mail:campbell-feng@126.com);励争(1964- ),女,教授(联系人.E-mail:lizheng@pku.edu.cn).

中图分类号: O321;O327
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- 被引次数: 0
出版历程
- 收稿日期: 2011-01-25
- 修回日期: 2011-02-21
- 刊出日期: 2011-04-15

Damage Detection Method in Complicated Beams With Varying Flexural Stiffness

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

摘要

摘要: 提出了适用于复杂梁结构损伤检测的子段模态应变能法SSEM(subsectionstrainenergymethod)，并分析了该方法的适用性条件．通过对变截面梁的有限元计算，以及对纤维增强复合材料风机叶片缩比模型的试验分析，验证了SSEM方法确定的结构损伤指标对损伤准确定位的可靠性．该基于振动的变刚度复杂梁结构的损伤检测方法，可应用于工程实际中梁和类梁整体结构的损伤检测．
- 损伤检测 /
- 模态应变能 /
- 变刚度梁 /
- 纤维增强复合材料 /
- 风机叶片
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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参考文献(8)

[1]	Farrar C R, Doebling S W. An overview of modal-based damage identification methods[C]Proceedings of the DAMAS Conference，Sheffield, UK,1997.
[2]	Ratcliffe C P. Damage detection using a modified Laplacian operator on mode shape data[J]. Journal of Sound and Vibration, 1997, 204(3): 505-517. doi: 10.1006/jsvi.1997.0961
[3]	Yoon M K, Heider D, Gillespie J W, Ratcliffe C P, Crane R M. Local damage detection using the two-dimensional gapped smoothing method[J]. Journal of Sound and Vibration, 2005, 279(1/2): 119-139. doi: 10.1016/j.jsv.2003.10.058
[4]	Wang J L,Qiao P Z. Improved damage detection of beam-type structures using uniform load surface[J]. Structure Health Monitor, 2007, 6(2): 99-110. doi: 10.1177/1475921706072062
[5]	Fan W, Qiao P Z. A 2-D continuous wavelet transform of mode shape data for damage detection of plate structures[J]. International Journal of Solids and Structures, 2009, 46(25/26): 4379-4395. doi: 10.1016/j.ijsolstr.2009.08.022
[6]	Chen H G, Yan Y J, Jiang J S. Vibration-based damage detection in composite wingbox structures by HHT[J]. Mechanical Systems and Signal Processing, 2007, 21(1): 307-321. doi: 10.1016/j.ymssp.2006.03.013
[7]	Ghoshal A, Sundaresan M J, Schulz M J, Pai P F. Structural health monitoring techniques for wind turbine blades[J]. Journal of Wind Engineering and Industrial Aerodynamics, 2000, 85(3): 309-324. doi: 10.1016/S0167-6105(99)00132-4
[8]	Stubbs N, Kim J T, Farrar C R. Field verification of a nondestructive damage localization and sensitivity estimator algorithm[C]Proceedings of the 13th International Modal Analysis Conference. Nashville, Tennessee, USA, 1995: 210-218.