Vibrational power flow of a finite cylindrical shell with discrete axial stiffeners

• 来源期刊: 声学学报（英文版）
• 学科: 工学
• 年，卷（期）: 2002,（1）
• 页码范围: 59-68
• 页数: 10页
• 分类号: TB5
• 语种: 英文

摘要

The structural wave power flows in an elastic finite cylindrical shell with discrete axial stiffeners are studied when a simple harmonic force is applied on it. The equations of motion of the shell are derived by using Flugge equation and Hamilton variational principle,and the responses of the shell are obtained. By use of the basic definition of the power flow, the characteristics of axial propagation of the power flow supplied by input structure and carried by different shell internal forces of a forced shell are investigated. The effects of parameters, such as relative location of driving force and stringer, driving force type and structural damping on the vibrational power flows in the shell, are discussed. These provide some theoretical bases for vibration control and noise reduction of this kind of structure.