| A Method for Reducing Noise Radiated from Structures with Vibration Absorbers by Using an Accelerated Neural Network |
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| 作者姓名： | 李连进 葛为民 |
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| 作者单位： | [1]SchoolofMechanicalEngineering,TianjinUniversity,Tianjin300072,China [2]CollegeofMechanicalEngineering,TianjinInstituteofTechnology,Tianjin300191,China |
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| 基金项目： | SupportedbyTianjinNaturalScienceFoundation(No .0 3380 1 41 1 ) |
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| 摘 要： | A method for reducing noise radiated from structures by vibration absorbers is presented. Since usual design method for the absorbers is invalid for noise reduction, the peaks of noise power in the frequency domain as cost functions are applied. Hence, the equations for obtaining optimal parameters of the absorbers become nonlinear expressions. To have the parameters, an accelerated neural network procedure has been presented.Numerical calculations have been carried out for a plate-type cantilever beam with a large width, and experimental tests have been also performed for the same beam. It is clarified that the present method is valid for reducing noise radiated from structures. As for the usual design method for the absorbers, model analysis has been given, so the number of absorbers should be the same as that of the considered modes. While the nonlinear problem can be dealt with by the present method, there is no restriction on the number of absorbers or the model number.
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| 关 键 词： | 减振器 噪声控制 神经网络 价值函数 |
A Method for Reducing Noise Radiated from Structures with Vibration Absorbers by Using an Accelerated Neural Network |
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| LI Lian jin ,GE Wei min.A Method for Reducing Noise Radiated from Structures with Vibration Absorbers by Using an Accelerated Neural Network[J].Transactions of Tianjin University,2004,10(1):9-15. |
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| Authors: | LI Lian jin GE Wei min |
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| Institution: | 1. School of Mechanical Engineering, Tianjin University, Tianjin 300072, China;College of Mechanical Engineering, Tianjin Institute of Technology, Tianjin 300191, China
2. College of Mechanical Engineering, Tianjin Institute of Technology, Tianjin 300191, China |
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| Abstract: | A method for reducing noise radiated from structures by vibration absorbers is presented. Since usual design method for the absorbers is invalid for noise reduction, the peaks of noise power in the frequency domain as cost functions are applied. Hence, the equations for obtaining optimal parameters of the absorbers become nonlinear expressions. To have the parameters, an accelerated neural network procedure has been presented. Numerical calculations have been carried out for a plate type cantilever beam with a large width, and experimental tests have been also performed for the same beam. It is clarified that the present method is valid for reducing noise radiated from structures. As for the usual design method for the absorbers, model analysis has been given, so the number of absorbers should be the same as that of the considered modes. While the nonlinear problem can be dealt with by the present method, there is no restriction on the number of absorbers or the model number. |
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| Keywords: | structure vibration and noise control vibration absorber neural network accelerated neural network |
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