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Multi objective optimization of sound transmission across laminated composite cylindrical shell lined with porous core investigating Non-dominated Sorting Genetic Algorithm

机译：研究非支配排序遗传算法的多层复合圆柱壳内壁传声的多目标优化

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The current formulation applies Non-dominated Sorting Genetic Algorithm (NSGA-II) as well as First order Shear Deformation Theory (FSDT) to optimize Sound Transmission Loss (STL) of the laminated composite cylindrical shell lined with a porous material subjected to a plane sound wave. Therefore, in the first part of the paper, the Extended Full method [29] is employed to provide an exact solution based on three dimensional elasticity theory as well as investigating the well-known Helmholtz decomposition to present fluid pressure, the displacement fields and the solid stresses. Subsequently, some configurations are brought up to illustrate the accuracy of the present results. Furthermore, this paper also clarifies the importance of applying porous layer by demonstrating the direct influence between porous layer thicknesses and STL of the structure particularly in high frequency region. Consequently, in the second part of the paper the NSGA-II method is applied to multi objective optimize of sound transmission into such structure taking account the appropriate Pareto front which result in substantial improvement on the performance of the system based on minimizing the weight as well as maximizing sound transmission. Therefore, this procedure is followed by considering suitable design variables to designate what combination of design variables could result in a composite shell satisfying the sound insulation. (C) 2017 Elsevier Masson SAS. All rights reserved.
机译：当前的公式应用非支配排序遗传算法（NSGA-II）以及一阶剪切变形理论（FSDT）来优化衬有多孔材料且经受平面声音的层压复合圆柱壳的声传输损耗（STL）波。因此，在本文的第一部分中，采用扩展完全法[29]基于三维弹性理论提供精确的解决方案，并研究了众所周知的亥姆霍兹分解，以给出流体压力，位移场和应力场。固体压力。随后，提出了一些配置以说明本结果的准确性。此外，本文还通过证明多孔层厚度和结构的STL之间的直接影响，特别是在高频区域，阐明了应用多孔层的重要性。因此，在本文的第二部分中，考虑到适当的帕累托前沿，将NSGA-II方法应用于声音传输的多目标优化，同时考虑到适当的帕累托前沿，这也基于最小化重量而显着改善了系统的性能。作为最大化声音传输。因此，在此过程之后要考虑合适的设计变量，以指定设计变量的哪种组合可以使复合材料外壳满足隔音要求。 （C）2017 Elsevier Masson SAS。版权所有。

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