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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Numerical analysis on the static-dynamic coupling influences of parallelism flaw in disc-rod rotor ball bearing system
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Numerical analysis on the static-dynamic coupling influences of parallelism flaw in disc-rod rotor ball bearing system

机译：盘杆转子球轴承系统平行度缺陷静动力耦合影响的数值分析

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摘要

The static-dynamic coupling influences of parallelism flaw are investigated in the disc-rod rotor ball bearing system. Three-dimensional finite element method and a contact solving method are combined to analyze the statics of flawed disc-rod rotor. This analysis shows that parallelism flaw causes mass eccentric and rotation-dependent rotor bow. When these dynamic factors are involved, parallelism flaw promotes the nonlinear complexity in high speed and reduces global stability areas for the flawed disc-rod rotor. Unstable motions are more likely to happen when rotating speed exceeds the critical speed when rotor has a parallelism flaw. The spectrums of flawed rotor are composed of rotating frequency, subharmonic frequency, and their linear combinations. Flawed rotor has a larger bow deformation and orbit size than the ideal rotor. Dynamic stress performs the same property with vibration curves which enables rotors to have the first-order bow deformation. Dynamic stress of flawed rotor is much higher than that of ideal rotor. This paper presents a numerical analysis method to study the static-dynamic features of disc-rod rotor ball bearing system with parallelism flaw.
机译：研究了圆盘杆转子球轴承系统中平行度缺陷的静动力耦合影响。结合三维有限元法和接触求解法对有缺陷的盘杆转子进行了静力分析。该分析表明，平行度缺陷会导致质量偏心和与旋转有关的转子弯曲。当涉及这些动态因素时，平行度缺陷会提高高速时的非线性复杂性，并减少有缺陷的盘杆转子的整体稳定性区域。当转子具有平行度缺陷时，当转速超过临界速度时，更可能发生不稳定运动。缺陷转子的频谱由旋转频率，次谐波频率及其线性组合组成。有缺陷的转子比理想转子具有更大的弓形变形和更大的轨道尺寸。动应力具有与振动曲线相同的特性，使转子具有一阶弓形变形。有缺陷的转子的动应力远高于理想转子。本文提出了一种数值分析方法来研究具有平行度缺陷的盘杆转子球轴承系统的静动力特性。

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