ROTOR DYNAMICS OF TURBOMACHINERY

Engineering & Consulting Centre for Dynamic Problems in Rotating Machinery

Rus

Back to publications

3.4.3 Calculation of a ring flexibility

---

A ring flexibility can be evaluated by the following formulae (see Fig.6):,

where

;

D₁, D₂ - ring inner and outer diameters;

b - ring width;

s - ring thickness.

;

d - maximal displacement (equal to a center pedestal height);

;

A - Young module;

n - number of center pedestals ;

d - milling cutter diameter;

b₁ - center pedestal width.

Stress in the ring is calculated by the formulae

The fatigue safety factor is calculated by a formulae similar to a flexible element one