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Acoustic scattering from the submerged finite periodically ribbed two concentric cylindrical shells, insonified by an incident plane wave, is studied. Motion of the shell is described by Donnell equations, while the motion of the disks is described by thin plate motion equations and plane ströss equations ignoring the effects of axial forces on the disks. Through angle-frequency spectra, besides the elastic waves of the shells, the contributions of the fluid between the inner and outer shells and the interaction of the inner and outer shells with the disks play an important role in the far scattering field. There are fine echo waves such as Bragg scattering and fluid-added waves excited on the angle-frequency spectra. Finally the theories are verified by experiments.
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Keywords:
- acoustic scattering /
- cylindrical shell /
- disk /
- fluid-added waves
[1] Skelton E A 1991 J. Sound Vib. 148 243
[2] Skelton E A 1992 J. Sound Vib. 154 205
[3] Skelton E A 1992 J. Sound Vib. 154 221
[4] Skelton E A 1995 J. Sound Vib. 181 635
[5] Zheng G Y, Fan J, Tang W L 2011 Journal of Ship Mechanics 15 1451
[6] Zheng G Y, Fan J, Tang W L 2011 Acta Acustca 36 377 (in Chinese) [郑国垠, 范军, 汤渭霖2011声学学报36 377]
[7] Guo Y P 1994 J. Acoustic. Soc. Am. 95 2550
[8] Tran-Van-Nhieu M 2001 J. Acoustic. Soc. Am. 110 2858
[9] Zheng G Y, Fan J, Tang W L 2009 Acta Acustca 34 490 (in Chinese) [郑国垠, 范军, 汤渭霖2009声学学报34 490]
[10] Zheng G Y, Fan J, Tang W L 2010 Acta Acustca 35 32 (in Chinese) [郑国垠, 范军, 汤渭霖2010声学学报35 32]
[11] Chen M X, Luo D P, Chen X N, Shen R X 2009 Acta Acustca 29 209 (in Chinese) [陈美霞, 骆东平, 陈小宁, 沈瑞喜, 2004声学学报 29 209]
[12] Chen M X, Chen J L, Guan S S, Luo D P 2005 Chinese Journal of Ship Research 27 27 (in Chinese) [陈美霞, 陈乐佳, 关珊珊, 骆东平2005 舰船科学技术27 27]
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[1] Skelton E A 1991 J. Sound Vib. 148 243
[2] Skelton E A 1992 J. Sound Vib. 154 205
[3] Skelton E A 1992 J. Sound Vib. 154 221
[4] Skelton E A 1995 J. Sound Vib. 181 635
[5] Zheng G Y, Fan J, Tang W L 2011 Journal of Ship Mechanics 15 1451
[6] Zheng G Y, Fan J, Tang W L 2011 Acta Acustca 36 377 (in Chinese) [郑国垠, 范军, 汤渭霖2011声学学报36 377]
[7] Guo Y P 1994 J. Acoustic. Soc. Am. 95 2550
[8] Tran-Van-Nhieu M 2001 J. Acoustic. Soc. Am. 110 2858
[9] Zheng G Y, Fan J, Tang W L 2009 Acta Acustca 34 490 (in Chinese) [郑国垠, 范军, 汤渭霖2009声学学报34 490]
[10] Zheng G Y, Fan J, Tang W L 2010 Acta Acustca 35 32 (in Chinese) [郑国垠, 范军, 汤渭霖2010声学学报35 32]
[11] Chen M X, Luo D P, Chen X N, Shen R X 2009 Acta Acustca 29 209 (in Chinese) [陈美霞, 骆东平, 陈小宁, 沈瑞喜, 2004声学学报 29 209]
[12] Chen M X, Chen J L, Guan S S, Luo D P 2005 Chinese Journal of Ship Research 27 27 (in Chinese) [陈美霞, 陈乐佳, 关珊珊, 骆东平2005 舰船科学技术27 27]
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