转子—轴承系统稳定性的试验研究

EXPERIMENTAL INVESTIGATION INTO STABILITY OF ROTOR—SLIDING BEARING SYSTEMS

通过试验，研究了受瞬时扰动的转子—滑动轴承系统的运动稳定性问题。结果表明，在接近失稳转速的某个范围，甚至是较大的范围内，一定强度的外界瞬时扰动会导致系统油漠失稳。失稳后系统并未发散而常常是稳定在一极限环上作“半频涡动”。此半频涡动的振幅一般大于由转子不平衡量引起的同频涡动的振幅，而频率约为系统当时转动频率的一半，并非系统不受扰失稳的界限值，即所谓“失稳转速”的相应频率值。

The experimental study was conducted on the stability of rotorsliding bearing systems by the transient perturbationthe test results show that in some speed range,even larger range,of approaching the system threshold of stability,the transient perturbation with the certain strength will result in the OLL WHIRL of the system ,and after that limit the system does not necessarily diverge but often converges to a limit cycle and does the so called halffrequency″ whirlAt the same time the test results show that the magnitude of the half frequency whirl is generally larger than that of the same frequency whirl,and the value of the former frequency depends mainly on the operation speed ,not the threshold of the system stability with no outside disturbence