针对某船舶高速轴系，为获得其临界转速及振动响应特征，建立了涡轮转子-传动轴-太阳轮转子试验台。首先，对大悬臂涡轮转子-轴承系统进行多次升降速试验，通过调整非驱动悬臂端模拟联轴器的的不平衡量(0、2、4、6、8和10 g)以及联轴器圆盘的质量(2.89、4.00和5.0 kg)，分别获得了不平衡量及不同等效质量对涡轮转子临界转速及振动响应的影响；然后，对整个涡轮转子-传动轴-太阳轮转子轴系，通过调整不平衡量(0～10 g)得到整个轴系的临界转速、涡轮转子和太阳轮转子两侧的不平衡响应特征。研究表明：大悬臂转子-轴承系统在过一阶临界转速(2 685 r/min)及工作转速(4 200 r/min)下，随着不平衡量的增加，各测点的基频振动幅值均有所增加；随着联轴器等效质量增大(0～5.83 kg)，轴系的临界转速从2 690 r/min降低至2 680 r/min；对整个轴系，随着不平衡量的增加轴系在工作转速时涡轮转子基频振动幅值显著增大，但太阳轮转子的基频振动基本无变化。

For a marine high speed shafting system,in order to obtain its critical rotating speed and vibration response characteristics,established was a turbine rotortransmission shaftsun wheel rotor test rig.First,several speed rise and decline tests were performed of the big cantilever turbine rotorbearing system.Through making adjustment to the imbalance mass (0,2,4,6,8 and 10 g) of the coupling at the nondriving cantilever end and the mass of the disk on the coupling (2.89,4.00 and 5.0 kg),obtained respectively was the influence of the imbalance mass and various equivalent masses on the critical rotating speed of the rotor of the turbine and vibration responses.Subsequently,for the whole turbine rotortransmission shaftsun wheel rotor shafting system,through making adjustment to the imbalance mass (0～10 g),the critical rotating speed of the whole shafting system,the imbalance response characteristics at both sides of the turbine rotor and sun wheel rotor were obtained.It has been found that for a big cantilever rotorshafting system,when it passes through the first order critical rotating speed (2 685 r/min) and runs at the working speed (4 200 r/min),with an increase of the imbalance mass,the vibration amplitudes at the base frequency at various measuring points will all somewhat increase.With an increase of the equivalent mass of the coupling (0～5.83 kg),the critical rotating speed of the shafting system will decrease from 2 690 r/min to 2 680 r/min.For the whole shafting system,with an increase of its imbalance mass,the vibration amplitude of the turbine rotor at the working speed at the base frequency will notably increase,however,the vibration amplitude of the sun wheel rotor at the base frequency will be basically unchanged.

TK263.6

国家自然科学基金资助项目（51576133，51536006）；上海市科委基地建设项目（13DZ2260900）；上海理工大学流动控制与仿真重点实验室资助项目（D15013）