轴承配置对转子轴系振动特性的影响

以三支承转子轴系为研究对象,采用有交互作用的正交试验法,分析轴承位置对转子轴系振动特性的影响,找出轴承位置的优选组合及对振动影响的主次顺序。将简化的转子轴系模型导入ANSYS Workbench中,分别对不同轴承位置下系统临界转速附近振动情况进行仿真分析,以前3阶中正涡动状态下的最小振动变形量为目标参数,得出了轴承位置变化同目标参数之间的关系。结果表明:轴承Ⅰ×Ⅱ的交互作用会对轴系的振动特性产生较大影响,轴承Ⅰ的位置对轴系的振动特性的影响最大,轴承Ⅲ的位置对轴系的振动特性影响相对较小。 

Influence of bearing arrangement on vibration characteristics of rotor shaft system

Taking the three-span rotor shaft system as the research object, the orthogonal test method with interaction was used to analyze the influence of bearing position on the vibration characteristics of the rotor shaft system, and find out the optimal combination of bearing position and the primary and secondary orders of the influence on vibration. The simplified rotor shaft system model was introduced into ANSYS Workbench to simulate the vibration near the critical speed of the system at different bearing positions. The minimum vibration deformation in the first three order vortex states was the target parameter, and the relationship between the bearing position change and the target parameters was obtained. The results show that the interaction of bearing Ⅰ×Ⅱ has a great influence on the vibration characteristics of the shaft system, the position of the bearing Ⅰ has the greatest influence on the vibration characteristics of the shaft system, and the position of bearing Ⅲ has a relatively small influence.