Abstract : the responses of shaft bow and their relationships with unbalanceresponses and mechanical or electronic run out are analyzed based on the theory of rotor dynamics . the responses of shaft bow are separated from the unbalance responses successfully by making use of vibration information under different rotor runs . an identification method of thermal bend is presented based on the 2d - holospectrum technique . experimental results show that when bow phase is steady and amplitude is variable , the tangent of initial phase point on the 2d - holospectrum is parallel , which can be effectively used for diagnosis of bent shaft 文摘:依据转子动力学理论分析了柔性转子弯曲响应的特征，在此基础上讨论了它与不平衡响应及机械与电气跳动量之间的关系，并利用转子在不同起车情况下的振动信息，有效地分离了弯曲响应和不平衡响应，求解出弯曲量与不平衡量的比值.提出了转子在恒定转速下，基于二维全息谱技术的热弯曲故障识别方法.研究结果表明，当弯曲量相位稳定而其幅值变化时，转子响应的二维全息谱初相点的切线是相互平行的，由此可以有效地实现转子热弯曲故障的识别与诊断
Based on frequency - spectrum - transformation , this algorithm first changes acceleration spectrum into displacement spectrum , then calculates its amplitude , angular frequency and initial angle related to every displacement spectrum , finally sums up all the displacement components and forms the time course of the measured vibration 该方法采用频谱转换法，首先将加速度谱转换成位移谱，再计算出位移谱中每个频率分量对应的幅值、圆频率和初相角，最后对各位移分量进行叠加得到振动位移的时间历程。
