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Fir tree fastening of turbomachinery blades—II

1982; Elsevier BV; Volume: 24; Issue: 6 Linguagem: Inglês

10.1016/0020-7403(82)90072-8

1879-2162

Gurjeet Singh, S. Rawtani,

Advanced Theoretical and Applied Studies in Material Sciences and Geometry

Blade-root fastening of the fir-tree shape, used in securing turbomachinery blades to the rotor has been analysed by considering it as an assembly of the step-segments, the stiffness characteristics of which are already obtained in Part-I. The general equation of equilibrium as well as the compatability of deformation between the steps of the blade and the disc give the necessary ‘n’ linear algebraic equations for the evaluation of the step loads in the n-step root. The method can accommodate the centrifugal body forces of the root itself, the friction between the blade and disc-steps and the difference in the material of the blade and the disc.