Identification of transverse crack position and depth in rotor systems

被引：73

作者：

Bachschmid, N ^{[1
]}

Pennacchi, P ^{[1
]}

Tanzi, E ^{[1
]}

Vania, A ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Meccan, I-20158 Milan, Italy

来源：

MECCANICA | 2000年 / 35卷 / 06期

关键词：

cracks; identification; rotating shafts; vibrations;

D O I：

10.1023/A:1010562205385

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper introduces a method for the identification of the position and the depth of a transverse crack in a rotor system, by using vibration measurements. As it is reported in literature and from field experience, a transverse crack modifies the dynamic behaviour of the rotor, generating in a horizontal axis shaft periodical vibrations with 1x, 2x and 3x rev. components. A model-based diagnostic approach and a least-squares identification method in the frequency domain are used for the crack localisation along the rotor. The crack depth is calculated by comparing the static bending moment, due to the rotor weight and to the bearing alignment conditions, to the identified 'equivalent' periodical bending moment, which simulates the crack. Finally, the validation of the proposed method is carried out statically and dynamically by means of experimental results obtained on a test-rig.

引用

页码：563 / 582

页数：20