裂纹非线性呼吸行为对转子临界转速的影响

程礼;何正嘉;李宁;陈雪峰;董洪波

振动与冲击 ›› 2010, Vol. 29 ›› Issue (4) : 44-47,5.

PDF(2529 KB)
PDF(2529 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (4) : 44-47,5.
论文

裂纹非线性呼吸行为对转子临界转速的影响

  • 程礼1,2;何正嘉1;李宁2;陈雪峰1;董洪波1
作者信息 +

Influence of Crack Nonlinear Breathing Behavioron the Critical Speed of the Rotor

  • CHENG Li1,2; HE Zheng-jia1; LI Ning2; CHEN Xue-feng1; DONG Hong-bo1
Author information +
文章历史 +

摘要

为了研究复杂涡动引起的裂纹非线性呼吸行为对转子临界转速的影响,构建了带横向裂纹Jeffcott转子的通用运动方程,利用新建运动方程对临界转速附近裂纹转子的稳态响应进行了数值研究。发现裂纹的非线性呼吸行为对转子不但具有增强稳定性的作用(与开裂纹转子相比),而且在一定条件下具有降低振动响应的作用(与无裂纹转子相比)。与无裂纹转子相似,稳定的裂纹转子的临界转速等于响应振幅最大且重心转向约 对应的转速。裂纹转子的临界转速值随不平衡量方位角在开裂纹和闭裂纹转子固有频率之间变化。在转子实验台上进行了裂纹转子通过临界转速的实验验证,观察数据支持理论研究结果。


Abstract

The general motion equations of a Jeffcott rotor with a transverse crack were developed for studying the influence of crack nonlinear breathing behavior due to whirling on the critical speed of the rotor, in which the complicated manner of rotor’s whirl is considered. By the new equations, the numerical results and analysis for the steady vibration response of cracked rotor near the critical speed show that the nonlinear breathing behavior not only can strengthen the stability of rotor (compared with the opening cracked rotor), but also can reduce the vibration response in certain conditions (compared with the un-cracked rotor).The stability cracked rotor is same as un-cracked rotor. When the rotation speed coincides with the critical speed, the vibration response is maximum and the center of gravity rotates about . The critical speed is a function of the imbalance orientation angle, varying between the natural frequency of rotor with crack opening and closing. The passage through critical speed experimental observations of cracked rotor on a rotor test rig support the analytical results.

关键词

裂纹转子 / 运动方程 / 涡动 / 临界转速 / 裂纹呼吸

Key words

Cracked Rotor / Motion Equations / Whirl / Critical speed / Crack Breathing

引用本文

导出引用
程礼;何正嘉;李宁;陈雪峰;董洪波. 裂纹非线性呼吸行为对转子临界转速的影响[J]. 振动与冲击, 2010, 29(4): 44-47,5
CHENG Li;HE Zheng-jia;LI Ning;CHEN Xue-feng;DONG Hong-bo. Influence of Crack Nonlinear Breathing Behavioron the Critical Speed of the Rotor[J]. Journal of Vibration and Shock, 2010, 29(4): 44-47,5

PDF(2529 KB)

Accesses

Citation

Detail

段落导航
相关文章

/