National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Shape optimization of new circumferential steam turbine blade attachment type
Mívalt, Tomáš ; Petruška, Jindřich (referee) ; Polzer, Stanislav (advisor)
This thesis describes selection and shows calibration of material model, capable of describing cyclic softening of material. Stress-strain FEM analysis of circumferential blade attachment for last section of rotor blades of steam turbine is performed, expected lifetime of existing attachment is evaluated. Multi-parameter optimization of new-shape attachment was done, resulting in dimensions for new-shape attachment with longer lifetime. Improvements in strain amount in comparison with existing attachment were evaluated and possible RPM increase of turbine with new attachment type was calculated.
Shape optimization of new circumferential steam turbine blade attachment type
Mívalt, Tomáš ; Petruška, Jindřich (referee) ; Polzer, Stanislav (advisor)
This thesis describes selection and shows calibration of material model, capable of describing cyclic softening of material. Stress-strain FEM analysis of circumferential blade attachment for last section of rotor blades of steam turbine is performed, expected lifetime of existing attachment is evaluated. Multi-parameter optimization of new-shape attachment was done, resulting in dimensions for new-shape attachment with longer lifetime. Improvements in strain amount in comparison with existing attachment were evaluated and possible RPM increase of turbine with new attachment type was calculated.

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