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基于能量法的裂纹梁振动特性分析
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Project supported by the National Natural Science Fund(11072204) and Central Scientific Research Fund of Colleges and Universities(SWJTU11ZT15)


Vibration characteristics analysis of cracked beams based on energy method
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    摘要:

    研究了含常开裂纹梁的横向振动,基于断裂力学中的能量法,推导了裂纹梁基于能量分布的连续弯曲及剪切刚度表达式;而后基于矩阵传递法,计算了含裂纹Timoshenko梁的振动特性,分析了裂纹深度及位置等裂纹参数对固有频率衰减的影响,同时将计算结果与有限元软件计算结果进行了比较,验证了该方法的有效性。

    Abstract:

    The transverse vibration of the beam with opening cracks was studied in this paper. Continuous bending stiffness and shear stiffness of the beam were deduced, based on energy distribution,using energy method of fracture mechanics. Then, the vibration characteristics of cracked Timoshenko beams were calculated using matrix transfer method. Natural frequency attenuation, which fluctuates with the variation of crack parameters such as depth and location of a crack, was analyzed. Comparing the results with those obtained by the finite-element method, the validity of the method used in this paper was verified.

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杨鄂川,李映辉,赵翔,李亮.基于能量法的裂纹梁振动特性分析[J].机床与液压,2014,42(12):34-39.
. Vibration characteristics analysis of cracked beams based on energy method[J]. Machine Tool & Hydraulics,2014,42(12):34-39

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  • 在线发布日期: 2015-04-21
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