Issue 49

S.A. Bochkarev et alii, Frattura ed Integrità Strutturale, 49 (2019) 814-830; DOI: 10.3221/IGF-ESIS.49.15





●, ○  = 0.00 ▲ , Δ  = 0.50 ■ , □  = 0.95

●, ○  = 0.00 ▲ , Δ  = 0.50 ■ , □  = 0.95

40

112

30

84

20

56

10

28

0

0

0.0 0.2 0.4

0.6

0.8

0.0 0.2 0.4 0.6 0.8





(a) (b) Figure 6 : Variation in the lowest natural frequencies  (Hz) with the level of the fluid in the annular gap between the shells  at different values of the eccentricity  and various electrical boundary conditions (shaded symbols — short-circuit mode, unshaded symbols — open-circuit mode) for clamped-clamped (a) and cantilevered (b) shells: k = 1/10.

(a) (c) Figure 7 : The lowest vibration mode of the electroelastic shell interacting with a fluid in the transverse  ( 0) y sections at different levels of the fluid in the annular gap  (CC, open-circuit mode,   1 10, 0) k  (b)

 ( 2) x L and longitudinal

 1.0; 

: (a)

(b)

 0.5; 

(с)  0.25. 

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