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液氢泵一般在超临界状态下工作,次同步进动是液氢泵转子动力学系统设计的关键问题之一。本文讨论一种解决内阻尼诱导的次同步进动的方法。我们通过对于典型液氢泵的分析、讨论了弹性支承的位置和刚度对转子动力学系统模态特性参数和次同步起始转速的影响;讨论了弹性支承提高次同步起始转速的机理和从次同步进动角度设计弹性支承的基本方法。典型液氢泵的理论分析和试验结果基本一致。
The liquid hydrogen pump generally works in the supercritical state. The sub-synchronous precession is one of the key problems in the design of the dynamics system of the liquid hydrogen pump rotor. This article discusses a solution to the internal damping induced sub-synchronous precession method. By analyzing the typical liquid hydrogen pump, we discuss the influence of the position and stiffness of the elastic support on the modal parameters and the subsynchronous starting speed of the rotor dynamics system. The mechanism of the elastic support for increasing the subsynchronous starting speed is discussed. Sub-synchronous precession angle design of the basic method of elastic support. Typical liquid hydrogen pump theoretical analysis and test results are basically the same.