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研究了疲劳裂纹对悬臂梁的固有频率及强迫振动响应的影响,使用余弦函数描述疲劳裂纹的开合过程。计算结果表明,疲劳裂纹不仅使悬臂梁的固有频率下降,而且引起非线性强迫振动响应。
The influence of fatigue crack on natural frequency and forced vibration response of cantilever beam is studied. The cosine function is used to describe the opening and closing process of fatigue crack. The results show that the fatigue crack not only decreases the natural frequency of the cantilever beam but also induces nonlinear forced vibration response.