本文主要讨论充液离心机转子系统自激失稳的“三维”计算方法。该方法采用了简单的质量-弹簧系统的振动来代替具有无限自由度的液体轴向非定常振动,保留解析解中代表液体二维非定常运动的项,从而克服了解析解出现密集奇点给稳定性判断带来的困难,获得了悬臂型离心机转子系统的自激失稳边界,并通过试验验证了“三维”计算结果与试验结果之间的一致性。 This article mainly discusses the “three-dimensional” calculation method of self-excitation instability of liquid-filled centrifuge rotor system. In this method, a simple mass-spring system vibration is used instead of the unsteady vibration of liquid with infinite degrees of freedom to keep the items that represent the two-dimensional unsteady motion of liquid in the analytic solution, thus overcoming the problem of dense singularities The stability of the cantilever centrifuge rotor system obtained self-excitation instability boundary, and verified by the test “three-dimensional” calculated results and the consistency between the test results.