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模态平衡法和影响系数法是转子平衡中最常用的两类方法,它们都以转子的稳态响应为基础,因此称之为“稳态平衡方法”。针对当前转子稳态平衡方法中存在的不足,提出了利用不平衡加速响应信息进行柔性转子平衡的新方法。为了描述模态不平衡相对键相槽的角位置,首次引入了模态不平衡方位角的概念,并通过转子的不平衡加速响应信息对其进行了识别;在此基础上,结合转子的模态知识,添加合理的平衡试重组,利用各阶模态试重大小与对应阶模态不平衡响应幅度增量的线性关系,识别出校正质量组的大小,通过双面加重的方法实现了转子前两阶模态的平衡。仿真和实验结果表明,该瞬态平衡方法在有效降低转子不平衡振动的同时,减少了平衡过程中的起车次数。
The modal balance method and the influence coefficient method are the two most commonly used methods for rotor balancing. They are all based on the steady-state response of the rotor and are therefore called the “steady state balance method.” Aiming at the shortcomings of the current rotor steady-state balance method, a new method to balance the flexible rotor using unbalanced acceleration response information is proposed. In order to describe the angular position of modal imbalance relative to key phase slot, the concept of modal imbalance azimuth is introduced for the first time and identified by unbalanced accelerating response information of rotor. On this basis, State knowledge, add a reasonable balance of test re-group, the use of modal test mode size and corresponding mode unbalanced response amplitude increment linear relationship to identify the correct quality of the size of the group, through the double-sided method to increase the rotor The first two modes of balance. Simulation and experimental results show that the transient balance method can effectively reduce the unbalance vibration of the rotor and reduce the number of starts during the balancing process.