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| Analysis of vibration reduction and optimization for open cylindrical shell with local constrained layer damping |
| Received:January 02, 2021 Revised:February 28, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20210102002 |
| KeyWord:constrained layer damping open cylindrical shell vibration reduction NSGA-II genetic algorithm structure optimization |
| Author | Institution |
| 赵冬艳 |
兰州交通大学 机电工程学院, 兰州 |
| 王怿磊 |
兰州交通大学 机电工程学院, 兰州 |
| 石慧荣 |
兰州交通大学 机电工程学院, 兰州 |
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| Abstract: |
| In order to reduce the vibration of open cylindrical shells,based on the theory of Sanders shell and Lagrange equation,a dynamics model of an open cylindrical shell with local constrained layer damping is established in this paper.The influences of the element number and thickness of viscoelastic element segments,duty ratio of damping element,laying angle and thickness of constrained layer on the loss factors and natural frequencies of the first three modes are analyzed.The effect of the parameters is obtained on the vibration characteristics of the structure.In addition,with the first three order modal loss factors as the objective,the NSGA-II genetic algorithm was used to optimize the cylindrical shell with constrained layer damping.The frequency domain characteristics of the structure with local constrained layer damping before and after optimization are analyzed.The results show that the structure parameters of the constrained layer damping have an important influence on the vibration reduction of the open cylindrical shell.And through optimization,the vibration reduction of the open cylindrical shell can be effectively improved on the condition of introducing lower mass of constrained layer damping. |
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