On Nonlinear Forced Vibration of Shrouded Turbine Blades

J. Szwedowicz, R. Visser, W. Sextro, P.A. Masserey, Journal of Turbomachinery 130 (2007) 011002–011002.

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Journal Article | English
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Abstract
Numerical predictions of the forced vibration of a disk assembly including frictional effects between the shrouds are presented concerning engineering needs for the blade design process. Assuming a tuned disk assembly, numerical static, free, and then forced vibration analyses of a shrouded turbine blade measured in the spin pit are performed systematically. For the excitation forces of an air jet evaluated from the fairly linear behavior of the experimental blade resonance peaks, the reliability of the proposed approach is validated through the very close agreement of the computed and measured resonant peaks. These resonant peaks demonstrate either a fairly linear behavior or a nonlinear one like the jump effect of blade resonance amplitudes, or elastic impacts between the shrouds. Also, the damping performance for different contact configurations between the shrouds is numerically analyzed. These numerical results indicate that the shrouds generate higher frictional damping for small angles (0{\^a}30deg) between the circumferential direction and the normal vector to the contact surface.
Publishing Year
Journal Title
Journal of Turbomachinery
Volume
130
Issue
1
Page
011002-011002
ISSN
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Szwedowicz J, Visser R, Sextro W, Masserey PA. On Nonlinear Forced Vibration of Shrouded Turbine Blades. Journal of Turbomachinery. 2007;130(1):011002-011002.
Szwedowicz, J., Visser, R., Sextro, W., & Masserey, P. A. (2007). On Nonlinear Forced Vibration of Shrouded Turbine Blades. Journal of Turbomachinery, 130(1), 011002–011002.
@article{Szwedowicz_Visser_Sextro_Masserey_2007, title={On Nonlinear Forced Vibration of Shrouded Turbine Blades}, volume={130}, number={1}, journal={Journal of Turbomachinery}, author={Szwedowicz, J and Visser, R and Sextro, Walter and Masserey, P. A}, year={2007}, pages={011002–011002} }
Szwedowicz, J, R Visser, Walter Sextro, and P. A Masserey. “On Nonlinear Forced Vibration of Shrouded Turbine Blades.” Journal of Turbomachinery 130, no. 1 (2007): 011002–011002.
J. Szwedowicz, R. Visser, W. Sextro, and P. A. Masserey, “On Nonlinear Forced Vibration of Shrouded Turbine Blades,” Journal of Turbomachinery, vol. 130, no. 1, pp. 011002–011002, 2007.
Szwedowicz, J., et al. “On Nonlinear Forced Vibration of Shrouded Turbine Blades.” Journal of Turbomachinery, vol. 130, no. 1, 2007, pp. 011002–011002.

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