DETECTION OF CRACKS IN ROTATING TIMOSHENKO SHAFTS USING AXIAL IMPULSES

被引：43

作者：

COLLINS, KR

PLAUT, RH

WAUER, J

机构：

[1] Department of Civil Engineering, Virginia Polytechnic Institute, State University, Blacksburg, VA

[2] Institut für Technische Mechanik, Universität Karlsruhe, Karlsruhe 1

来源：

JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME | 1991年 / 113卷 / 01期

关键词：

D O I：

10.1115/1.2930158

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A rotating Timoshenko shaft with a single transverse crack is considered. The crack opens and closes during motion and is represented by generalized forces and moments. The shaft has simply supported ends, and the six coupled, piecewise-linear equations of motion (including longitudinal, transverse, and torsional displacements) are integrated numerically after application of Galerkin's method with two-term approximations for each of the six displacements. Time histories and frequency spectra are compared for shafts with no crack and with a crack for which the crack depth is one-fifth of the shaft diameter. Free vibrations and the responses to a single axial impulse and periodic axial impulses are analyzed. The last case appears to provide an effective means for detecting cracks in rotating shafts.

引用

页码：74 / 78

页数：5

共 17 条

[1]

Collins K.R., The Effect of Cracks on the Dynamic Behavior of Bars and Shafts, (1989)

[2]

Collins K.R., Plaut R.H., Wauer J., Free and Forced Longitudinal Vibrations of a Cantilevered bar with a Crack

[3]

Cowper G.R., The Shear Coefficient in Timoshenkos Beam Theory,” ASME, Journal of Applied Mechanics, 33, pp. 335-340, (1966)

[4]

Gasch R., Person M., Weitz B., Dynamic Behaviour of the Laval Rotor with a Cracked Hollow Shaft—A Comparison of Crack Models, Vibrations in Rotating Machinery, pp. 463-472, (1988)

[5]

Imam I., Azzaro S.H., Bankert R.J., Scheibel J., Development of an On-Line Rotor Crack Detection and Monitoring System, ASME, Journal of Vibration, Acoustics, Stress, and Reliability in Design, 3, pp. 241-250, (1989)

[6]

Kirmser P.G., The Effect of Discontinuities on the Natural Frequency of Beams, Proceedings of the American Society for Testing and Materials, 44, pp. 897-904, (1944)

[7]

Li C., Bernasconi O., Xenophontidis N., A Generalized Approach to the Dynamics of Cracked Shafts, ASME, Journal of Vibration, Acoustics, Stress, and Reliability in Design, 3, pp. 257-263, (1989)

[8]

Papadopoulos C.A., Dimarogonas A.D., CoupledLongitudinal and Bending Vibrations of a Rotating Shaft with an Open Crack, Journal of Sound and Vibration, 117, pp. 81-93, (1987)

[9]

Petroski H.J., Simple Static and Dynamic Models for the Cracked Elastic Beam, International Journal of Fracture, 17, pp. R71-R76, (1981)

[10]

San Juan L., Saavedra P., Experimental and Analytical Study of Shaft Cracking Response in Rotatory Machines, Proceedings of the 8Th International Modal Analysis Conference, 1, pp. 445-450, (1990)

← 1 2 →