PSI - Issue 6

Valerii P. Zolotarevich et al. / Procedia Structural Integrity 6 (2017) 224–227

227

4

V.P. Zolotarevich, A.E. Salienko, A.I. Frumen, N.V. Yugov / Structural Integrity Procedia 00 (2017) 000–000

4. Conclusion

The approach for calculation of natural frequencies and mode shapes of the runners of the turbines through the application of the coupled of finite and boundary elements method presented. The results of calculations for the runner Francis turbine and the blades of the runner Kaplan turbine showed good agreement with the experimental data. The developed method was applied to the analysis of the causes of the destruction of the runner of Francis turbine. Studies have shown that the critical appearance of resonance oscillations in the result of a coincidence of natural frequencies of the runner with frequencies of the disturbing forces determines the strength of the wheel, of blades and also the possible nature of their destruction.

References

Doujak, E., Eichhorn, M., 2016. An approach to evaluate the lifetime of a high head francis runner., in: 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery. Fjeld, O.M., 2015. Simulation Of The Natural Frequencies In A Pump-turbine Runner In Air And Water. Norwegian University of Science and Technology. Yugov, N., Ionov, A., Minin, R., 2000. Modeling vibration and acoustic fields in ship hull structures, in: Mathematical modelling in Solid mechanics by Boundary & Finite element methods. BEM & FEM-2000. Zhongyu, M., Zhengwei, W., 2016. Structural characteristic in prototype runner of francis turbine analysis, in: 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery.