Vibroacoustic Analysis of a Fluid-Loaded Cylindrical Shell Excited by a Rotating Load

Sound Radiation from Finite FGM Cylindrical Shell Excited by a Rotating Load

“…These indicators are global in nature, and they are calculated at the harmonic angular frequencies N of the load rotational speed . [13 ] The numerical studies are based on a simply supported FGM cylindrical shell of which the geometrical and mechanical parameters are as follows: length L=2.0m, radius a=0.3m, thickness h=0.005m. The FGM cylindrical shell is supposed to be immersed in air and water, and water is characterized by density 0 =1000kg/m 3 and sound speed c 0 =1500m/s.…”

“…The all detail derivation process and the calculations of , , and can be found in references [12][13] on sound radiation from shells in light and heavy fluid.…”

“…The response of the simply supported shell subjected to the moving load is a combination of harmonic motions at discrete frequencies N [12][13] . The shell displacement vector can be easily expanded as a series of the in vacuo simply supported shell modes…”

“…Second, the Helmholtz equation for the acoustic pressure in the fluid and the boundary conditions are given in reference [12][13].…”

“…There are a large number of cases of practical interest to the industry in which a fluidloaded cylindrical shell is excited by a non-moving mechanical point forces or by a moving load traveling continuously along its circumference [5][6][7][8][9][10][11][12][13] . However, the sound radiation of functionally graded structures has not been extensively researched.…”