| AGS结构的损伤定位仿真 |
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| 引用本文： | 陈振英,徐志伟,苟欢敏.AGS结构的损伤定位仿真[J].振动．测试与诊断,2012,32(3):452-457. |
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| 作者姓名： | 陈振英 徐志伟 苟欢敏 |
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| 作者单位： | 南京航空航天大学智能材料结构航空科技重点实验室 南京,210016 |
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| 基金项目： | 国家自然科学基金重大研究计划资助项目，国家自然科学基金重点资助项目 |
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| 摘 要： | 为了检测先进复合材料格栅结构(AG S)的损伤所在位置,提出了通过计算结构在损伤前、后模态曲率差的方法,来进行计算和分析。建立了格栅结构在有约束条件下的有限元模型,通过AN SY S中的模态分析得到模态振型位移值,计算了结构损伤前、后的模态曲率差,通过这一指标对结构的损伤进行辨识,并分析了采用多阶模态的计算效果。结果表明,通过第1阶模态振型模态曲率差的计算,可对单损伤状况做出有效的检测;对于多损伤工况,需使用前3阶模态的曲率差进行分析,才能有效检测损伤的位置。
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| 关 键 词： | 格栅结构 损伤定位 模态曲率差 多损伤工况 有限元分析 |
Damage Recognition Simulation of the AGS |
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| Chen Zhenying,Xu Zhiwei,Gou Huanmin.Damage Recognition Simulation of the AGS[J].Journal of Vibration,Measurement & Diagnosis,2012,32(3):452-457. |
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| Authors: | Chen Zhenying Xu Zhiwei Gou Huanmin |
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| Affiliation: | (Aeronautical Science Key Laboratory of Smart Materials and Structures,Nanjing University of Aeronautics and Astronautics Nanjing,210016,China) |
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| Abstract: | Aiming at the feasibility of the damage recognition of AGS,the modal curvature difference method is used to evaluate the damage factors of the structure.The regular triangular grid structure is analyzed using the finite element method in ANSYS,the modal curvature difference between the original structure and the damaged is calculated by using the modal displacement which is got from the finite element analysis,and the damage can be recognized through this label.The result shows that: the first modal curvature difference is sensitively to the damage of the ribs for single damage and the first three modal curvatures should be analyzed for multi damages. |
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| Keywords: | grid structure damage recognition modal curvature difference multi damages finite element method |
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