校中状态对轴系横向振动传递特性影响研究

校中状态是影响推进轴系振动的重要因素,轴系与舰艇尾部的耦合振动是影响其声隐身性能的重要激励源。本文首先对某船推进轴系进行负荷校中,通过研究轴承变位对轴承油膜特性的影响,确定了轴系校中前后轴系支撑边界条件的变化,然后通过仿真和试验验证的方法研究了校中状态对轴系振动传递特性的影响。结果表明,负荷校中能够有效抑制轴系在一些峰值频率点的振动传递。

Research on the influence of shafting alignment condition on transverse vibration transmission characteristics

Alignment condition is an important factor affecting propulsion shafting vibration, the coupled vibration of shafting and stern hull is an important excitation source to acoustic stealth performance. In this paper, the load calibration of a propulsion shafting is first carried out, and the influence of bearing displacement on the characteristics of bearing oil film is studied, thus the change of the supporting boundary condition of shafting before and after shafting alignment is determined.Then, the influence of alignment condition on the vibration transmission characteristics of the shafting is investigated by simulation and experimental verification. Results show that the load calibration can effectively suppress the vibration transmission of shafting at some peak frequency points.