摘要
转子系统临界转速作为转子系统动力学特性的重要组成部分,一直受到广泛关注。在对航空发动机转子系统的临界转速进行有限元计算时,由于考虑到计算机的硬件限制,可以将带机匣的转子系统拆分成机匣和转子系统进行分别计算。通过一个带圆筒的双转子模型模拟发动机的整机模型,通过计算可知:将带机匣的转子系统拆分计算相对于整体计算而言是有误差的,其误差主要来源于未考虑机匣支承间的刚度耦合。
Rotor critical speed, as an important part of rotor dynamic characteristics of the system, has attracted widespread concern. When the finite element calculations are used for the critical speed of aer- o-engine rotor system, given the limitations of computer hardware, the rotor-casing system can be divid- ed into casing and rotor system to calculate respectively. In this paper, the whole model with a two-cyl- inder engine rotor model simulated by calculation shows：compared with overall calculation, the separate calculation of the casing and rotor system respectively produces errors, which result mainly from the non-considered stiffness coupling between the casing bearings.
出处
《沈阳航空航天大学学报》
2014年第6期7-11,共5页
Journal of Shenyang Aerospace University
关键词
转子系统
临界转速
刚度耦合
误差分析
rotor system
critical speed
stiffness coupling
error analysis
