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- 2019
韧带型手性结构固有频率优化
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Abstract:
对具有负泊松比的六韧带手性结构的动力性能进行了研究。以提高韧带手性结构胞元结构刚度为目标，建立基于固有频率参数的优化模型。通过定义不同阶次固有频率对应的权重系数，实现了固有频率参数的归一化。选择韧带手性结构胞元的韧带厚度、圆环壁厚两个参数为优化变量，建立了结构优化方程。最后，应用遗传算法（GA）对韧带手性结构进行优化。结果表明，优化后其前几阶固有频率明显提高，为减振降噪新材料的设计与应用提供了参考。 The structural dynamic characteristics analysis of hexagonal chiral structures with negative Poisson's ratio were studied in present research. In order to improve the structural stiffness performance of the hexagonal chiral element structure, an optimization formulation based on natural frequency parameters was established. By defining the weight coefficients corresponding to the natural frequencies of different orders, and the normalized model for the natural frequency parameter was established. Defining the chiral thickness and circular wall thickness of the element structure as design variable, the optimization equation was established. Finally, the structural optimization was carried out by introducing the genetic algorithm (GA). The results show that the natural frequency is obviously improved after optimization, which provides a certain reference value for the design and application of new materials for vibration and noise reduction
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