Sound-structure interaction analysis of an infinite-long cylindrical shell submerged in a quarter water domain and subject to a line-distributed harmonic excitation

Analysis of the input power flow characteristics of cylindrical shells with combination boundaries

“…Meanwhile, the synthetic sound pressure on the free liquid surface is zero. Equation (21) is the only correct solution of the acoustic vibration problem in the rectangular spatial domain described in Figure 3, which is consistent with the uniqueness of the solution of the acoustic wave equation, and equation (21) satisfies the wave equation. Further research shows that the two boundaries of the rectangular space domain are free surface and rigid wall.…”

“…Re½F 0 cosðnh T Þv r ð0Þ Ã Rdh T . Substituting equations (21) and (26) into equation (27), the input power flow of the cylindrical shell is expressed as follows…”

“…In the quarter-infinite acoustic domain, the normal velocity on the rigid wall boundary is zero ( ∂p(x,y,z,t)/∂n=0), the acoustic pressure on the compliant boundary is zero ( p(x,y,z,t)=0). According to the research results by Guo et al., 21 Chan et al., 22 and Chen et al., 23,24 to solve the wave motion problem in the quarter-infinite acoustic domain, the double reflection method is highly effective. Double reflection method states that the quarter-infinite domain has four acoustic radiation sources, as shown in Figure 3.…”

“…By deriving acoustic radiation equations for a cylindrical shell with free and rigid wall surfaces, Ye et al 20 examined the acoustic radiation problem of a cylindrical shell with complex acoustic boundary conditions. A semi-analytical method function of acoustic radiation for cylindrical shell which subject to a line-distributed harmonic excitation was discussed by Guo et al 21 Chan et al 22 discussed the wave reflection problem in a corner domain while considering the simply supported or roller-supported boundary conditions. The structural-acoustic radiation problem of cylindrical shells was solved using the double reflection method, in which the acoustic boundary conditions consist of a free surface and a rigid wall surface in a quarter-infinite domain.…”

“…A semi-analytical method function of acoustic radiation for cylindrical shell which subject to a line-distributed harmonic excitation was discussed by Guo et al. 21 Chan et al. 22 discussed the wave reflection problem in a corner domain while considering the simply supported or roller-supported boundary conditions.…”