论文部分内容阅读
本文提出了预示弹性支承轴系临界转速的子系统阻抗分析法。将弹性支承轴系分为转子子系统与支承子系统,假定在交联点处的位移阻抗值,则可由频率方程式确定转子子系统的临界转速。支承子系统的位移阻抗特性可由试验求得,或者,当能够很好地建立支承子系统的数学模型时,也可由计算确定之。按照各子系统在交联点处的阻抗一致的条件,可以用图解法求得整个弹性支承轴系的临界转速。文中列举了具有一个与两个弹性支承的单盘轴系的若干例子。计算与试验结果表明,子系统阻抗分析法,是转子动力学分析与试验研究的一种准确可靠的、经济的方法。
This paper presents a subsystem impedance analysis method predicting the critical speed of the elastic support shaft. The elastic support shaft is divided into the rotor subsystem and the support subsystem. Assuming the displacement impedance value at the cross-link point, the critical speed of the rotor subsystem can be determined by the frequency equation. Displacement impedance characteristics of the support subsystem can be determined experimentally, or can be determined by calculations when the mathematical model of the support subsystem can be well established. In accordance with the conditions of the sub-system at the cross-linking point of the same impedance, the critical speed of the entire elastic support shaft system can be obtained by graphic method. A few examples of a single-shaft system with one and two resilient bearings are listed. The calculation and test results show that the subsystem impedance analysis method is an accurate, reliable and economical method for rotor dynamics analysis and experimental research.