摘要
本文探讨了多对齿轮耦合对齿轮转子系统动力学特性的影响程度,以压缩机转子系统为例,对整个耦合系统进行了安全校核。首先,基于有限元法,建立了通用的弯—扭—轴—摆斜齿轮耦合动力学分析模型,此模型中考虑了啮合刚度、方位角、啮合角、螺旋角以及主动轴转动方向对齿轮啮合刚度矩阵的影响;接着,对系统进行了固有特性分析,得到了系统的临界转速和安全裕度表;然后,基于模态叠加法,对系统进行了不平衡响应分析,对比了考虑齿轮啮合前后系统各位置处的不平衡响应变化曲线。研究结果表明,对于多对齿轮啮合的系统,齿轮间的耦合使系统之间的振动强烈,必须考虑齿轮耦合的影响,并且要结合固有特性以及瞬态响应分析来判断临界转速和振动峰值的大小。
Abstract
This paper, which takes the compressor rotor system for example, estimates the effect of the coupled gear meshing on dynamic characteristics of a rotor system and conducts a security check on the overall coupled system. Firstly, based on the FEM (Finite Element Method), we establish a general dynamic coupled lateral-torsional-axial-swinging model of helical gear meshing, which considers the effect of mesh stiffness, gear position angle, transverse pressure angle, helical angle and the vibration of the driving shaft to the gearing mesh stiffness matrix. Then, the critical speeds of the system and the safety margin tables are obtained as a result of the analysis of the natural characteristics of the system. Next, unbalance response of the system is analyzed based on MSM (mode superposition method). Unbalanced response curves of every gear mesh point are compared with considering meshing or not. The research results demonstrate that the effect of gear coupling must be considered in a multi-gear meshing system because the vibration between the systems becomes so intense that the critical speeds and vibration peak should be judged by the combination with inherent characteristics and transient response analysis.
关键词
有限元法 /
齿轮 /
耦合 /
转子 /
振动
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Key words
FEM /
Gear /
Coupled /
Rotor /
Vibration
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朱丽莎;张义民;马辉;何永慧.
多齿轮耦合复杂转子系统的振动特性分析[J]. 振动与冲击, 2013, 32(14): 34-39
Zhu Li-sha;Zhang Yi-min;Ma Hui;He Yong-hui.
Vibration Analysis of Complex Rotor System with Coupled Multi-Gear Meshing[J]. Journal of Vibration and Shock, 2013, 32(14): 34-39
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脚注
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