一种裂纹梁振动响应分析的近似方法

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An Approximate Method of Response Analysis of Vibrations for Cracked Beams

Department of Engineering Mechanics, Shanghai Jiaotong Universiy, Shanghai 200030, P. R. China

摘要: 本文以线弹簧模型为基础提出了一种近似分析裂纹梁振动响应的方法.把该方法同Euler-Bernoulli梁理论、模态分析方法以及断裂力学原理等结合起来运用,导出裂纹梁振动的特征方程.作为应用实例,本文考核了简支裂纹梁和悬臂裂纹梁的固有频率响应.结果表明,本文所获得的解与现有文献中的解或实验结果取得很好的一致.
- 裂纹梁 /
- 线弹簧模型 /
- 固有频率响应
Abstract: In this paper a method based on a line-spring model was proposed to analyze approximately vibration responses of cracked beams. The method in conjumction with the Euler-Bernoulli beam theory. modal analysis and fracture mechanics principle was applied to derive a characteristic equation for the cracked beam vibration. As application examples. natural frequency responses for a cracked hinge-hinged beam and a cracked cantilever beam were examined It was shown that the present solutions obtained are quite in agreement with the solutions or experimental results in available references.
- cracked beam /
- line-spring model /
- response of natural frequency

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