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在板状结构的抗噪减振中,约束阻尼层的铺设应用是非常广泛的,特别是局部约束阻尼的铺设。该文在Ansys环境下,主要研究了关于局部约束阻尼层铺设的优化问题。首先讨论了约束阻尼的有限元建模方法,然后应用该有限元模型,以提高前若干模态阻尼为目标,采用Cellular Automa-ta及该文改进算法(CAM)探讨了约束阻尼层的拓扑优化。在此基础上,提出了同时考虑局部约束阻尼拓扑形状优化和多设计参数优化的综合方法。仿真结果表明,该方法可以获得更高的阻尼添加效率,可以为板和圆柱壳等工程结构约束阻尼层的铺设提供一定的设计准则。
In the anti-noise damping of the plate structure, the application of the constraining damping layer is very extensive, especially the laying of the partially restrained damping. In the Ansys environment, this paper mainly studies the optimization problem of partially constrained damping layer laying. Firstly, the finite element modeling method of constrained damping is discussed. Then, with the help of the finite element model and Cellular Automa-ta and CAM, the topological optimization of constrained damping layer is discussed. . On this basis, an integrated method considering both topological shape optimization and multi-design parameter optimization of locally constrained damping is proposed. The simulation results show that this method can obtain higher damping adding efficiency, and can provide some design criteria for the laying of constrained damping layer of engineering structure such as plate and cylindrical shell.