RESEARCH ON CHARACTERISTICS OF SOUND RADIATION IN WATER FROM STIFFENED CYLINDRICAL SHELLS EXCITED BY INTERIOR SOURCE: Ⅰ. THEORY
In this paper, the coupling vibration equation of a finite stiffened cylindrical shell excited by interior air noise is deduced based on Flügge thin shell theory and Helmholtz wave equation. To solve this “closed cavity- finite stiffened cylindrical shell-exterior radiated sound field coupling equation, the shell’s displacement form is expanded along the circumferential direction and the axial direction by using double series of mode superposition, the effects of stiffeners are induced into the vibration equation by treating them as reverse included in forces and moments on the shell, and the closed cylindrical cavity is expanded along the circumferential direction, the axial direction and the radial direction by using three series. Fluid-solid coupling equation based on shell’s displacement is gained at last. After the coupling equation being solved, several physical quantities characterizing vibration and sound radiation characteristics such as the interior mean quadratic sound pressure level, the radiated sound power level and the mean quadratic vibration velocity level are deduced. At last, a method for calculating sound radiation from stiffened cylindrical shells excited by interior source is put forward in the present paper.
Chen Meixia Guan Shanshan Zhang Zihao He Weiping
Huazhong University of Science and Technology Wuhan 430074
国际会议
The Fifth International Conference on VETOMAC-V(第五届振动工程及机械技术国际会议)
武汉
英文
401-415
2009-08-27（万方平台首次上网日期，不代表论文的发表时间）