PSI - Issue 79

Victor Rizov et al. / Procedia Structural Integrity 79 (2026) 109–116

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the graphs depicted in Fig. 4. The rise of the SERR when the parameter,  , increases is attributed to growth of normal and tangential accelerations in the rotating structure (Fig. 4).

Fig. 3. The SERR vs. 1 2 / l l ratio (curve 1 – at

/ 4 = L L R R

0.5 1

/ 4 = L L R R

2.0 1

/ 4 = L L R R

1.0 1

, curve 2 – at

and curve 3 – at

).

4 1 / L L   ratio (curve 1 – at

0.1 =  , curve 2 – at

0.2 =  and curve 3 – at

0.3 =  ).

Fig. 4. The SERR vs.

4 1 / L L   ratio leads to smooth reduction of the SERR as

The increase of the structure stiffness due to growth of one can see in Fig. 4. Finally, the effects of the parameter,  , and the

1 4 / L L m m ratio on the longitudinal fracture in the rotating

1 4 / L L m m ratio characterizes the variation of the distributed mass along the length of the

structure are studied (the

1 4 / L L m m ratios as depicted in

structure). For this purpose, the SERR is expressed as a function of  at different

Fig. 5. The rise of the SERR when the 1 4 / L L m m ratio grows is due to growth of the intensities of the inertia loads on the structure under consideration. The rise of the parameter,  , leads to growth of the normal and tangential accelerations which is the reason for growth of the SERR that can be observed in Fig. 5.