YIN Xuewen1,2 WANG Gongxian3 HUA Hongxing2 SHEN Rongying2

(1 Wuxi Branch, Jiangsu Institute of Special Equipment Safety Supervision and Inspection Wuxi 214171)

(2 State Key Lab. Of Mechanical System and Vibration, Shanghai Jiaotong Univ. Shanghai 200240)

(3 School of Logistics Engineering, Wuhan University of Technology Wuhan 430063)

Received Oct. 3, 2008

Revised Mar. 29, 2010

Abstract The coupling effects on two concentric cylindrical shells with periodic annular plates as well as entrained fluid were investigated theoretically. Expressions for the reactive forces by the annular plates were derived on the assumption that only quasi-longitudinal waves exist in the annular plates and an analytical expression for the outer shell was developed. Comparisons of numerical results for infinite two-walled cylindrical shell to measured data for a cabin model are in good agreement. Numerical results were presented for analyzing the characteristics of the loadings due to the acoustic fluid and the periodic annular plates, and their influences on the outer shell's far field acoustic radiation.

PACS numbers: 43.20,43.30,43.40