Abstract
Cylinder container is a thin cylindrical shell sealed by a top and bottom plate. The internal noise reduction of the cylinder container is very important for vehicle, ship and other projects. A finite element model of the cylinder container vibration coupled with internal acoustic field is set up and the acoustic response feature is determined. Then, two optimization models are adopted: (1) the acoustic response is taken as the object function and the structure weight is taken as constraints; (2) the structure weight is taken as the object function and the acoustic response is taken as constraints. The design variables are thickness distribution for shell, bottom plate and top plate. The optimization problem is solved by the feasible direction method and a 30 dB reduction of the pressure level is achieved for optimum designs. The results show the effectiveness of the method.
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