5.7   Blade vibration control

 

In view of the large number of blades in any turbine machine, the existence of unavoidable sources of vibration excitation and the serious consequences of the failure of just one blade, an intimate knowledge and understanding of the vibration characteristics of the blades in their operating environment is essential.

      5.7.1   Natural frequencies and excitation frequencies

      5.7.2   Sources of vibration excitation

      5.7.3   Verification of estimated natural frequencies and wheel chamber tests

      5.7.4   Methods of vibration control

 

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