| 受损悬臂梁的模态分析研究 |
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| 引用本文： | 钟丽萍.受损悬臂梁的模态分析研究[J].机械设计与制造,2011(1). |
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| 作者姓名： | 钟丽萍 |
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| 作者单位： | 沈阳职业技术学院机械装备系,沈阳,110045 |
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| 摘 要： | 基于Euler-Bernoulli梁的自由振动方程,利用一阶摄动方法,对受损悬臂梁进行了模态分析计算,并利用Pro/MECHANICA有限元结构分析软件对悬臂梁受损前后的模态进行分析,与摄动数值计算方法进行比较,验证摄动理论分析的正确性。通过具体算例,得出悬臂梁在受损前后前四阶固有频率,以及在各个固有频率下的位移、应力云图,从而验证了基于摄动法理论分析的正确性,为利用动力学特性对悬臂梁的损伤监控和检测提供了理论依据。
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| 关 键 词： | 悬臂梁 结构损伤 摄动方法 有限元仿真 模态分析 |
The research of modal analysis method based on damaged cantilever-beam |
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| ZHONG Li-ping.The research of modal analysis method based on damaged cantilever-beam[J].Machinery Design & Manufacture,2011(1). |
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| Authors: | ZHONG Li-ping |
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| Affiliation: | ZHONG Li-ping(Collge of Vocational Technologe Shenyang,Shenyang 110045,China) |
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| Abstract: | The main topic is based on the Euler-Bernoulli theory,a free vibration equation of the beam.By the virtue of first-order perturbation method,Pro/MECHANICAL software-structural analysis of the finite element-and mathematical analytics,we discussed the modal analysis method of the cantilever-beam being damaged,including the fourth-order intrinsic frequency of the damaged beam,the displacement and the stress cloud chart under each intrinsic frequency.Thus,we can prove the correctness of the analysis based on p... |
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| Keywords: | Cantilever-beam Structural damage Perturbation method Finite element emulation Modal analysis |
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