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Vibration features of turbine blades with fastening connectors a round the wheel

  • Scientific-Technical Section
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Strength of Materials Aims and scope

Conclusions

  1. 1.

    It is necessary to take into account the flexural rigidity of damping wire connectors during blade vibration. Disregarding the flexural rigidity of the wires may lead to significant errors for mainly torsional vibration configurations.

  2. 2.

    Energy disippation in the contact zone between blades and connectors appears to be a governing factor after the dynamic stress level has risen to reach a level corresponding to slip initiation over the whole contact zone. The specified level markedly depends on the construction and number of connectors, and may be altered over a wide range as required.

  3. 3.

    After slip initiation over the whole contact area vibration frequency decreases, with increasing amplitude. For mainly torsional vibration the dynamic stress level in the blades corresponding to slip initiation increases, as a rule, with increasing turbine power.

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Literature Cited

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Authors
  1. K. N. Borishanskii
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Additional information

Leningrad. Translated from Problemy Prochnosti, No. 6, pp. 8–13, June, 1978.

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Borishanskii, K.N. Vibration features of turbine blades with fastening connectors a round the wheel. Strength Mater 10, 625–630 (1978). https://doi.org/10.1007/BF01523889

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  • DOI: https://doi.org/10.1007/BF01523889

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