考虑分层梯度的筒状蜂窝基座隔振性能研究

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摘要多孔蜂窝具有良好的吸能隔振特性，但是传统蜂窝基座主要研究其均匀参数的增加或减少对隔振性能的影响，且易出现应力集中、面内刚度低承载能力差的缺陷。为此提出了一种圆筒状蜂窝基座，分析了筒状蜂窝基座抗变形能力，通过优化软件内置序列二次规划算法，在满足一定的隔振性能前提下，优化出合理的基座设计参数。基于优化得到的基座参数进行了分层梯度设计，分别以胞元壁厚、内凹角度为自变量，设计了顺厚度梯度、逆厚度梯度、顺角度梯度、逆角度梯度的蜂窝层，在确保基座质量体积不变的前提下，讨论了分层梯度设计对基座隔振性能的影响。结果表明：圆筒状蜂窝基座较之于规则方形基座其比刚度更高，承载能力更强，厚度梯度的设计较之均匀参数设计隔振性能有所提升，逆厚度梯度设计隔振效果最佳，角度梯度设计对隔振性能影响不明显。

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	黄江成1
	肖正明1
	刘涛1
	刘卫标2

关键词 ：分层梯度, 筒状蜂窝基座, 优化设计, 隔振性能

Abstract：The porous honeycomb has good energy absorption and vibration isolation characteristics. However, the research on traditional honeycomb base is mainly focused on the effect of increasing or decreasing uniform parameters on vibration isolation performance, which is prone to the defects of stress concentration and low in-plane stiffness and poor bearing capacity. Therefore, in this study, we propose a cylindrical honeycomb base and analyze its non-deformability resistance through simulation. on the premise of satisfying certain vibration isolation performance, reasonable design parameters of the base can be optimized by optimizing the sequential quadratic programming algorithm built into the software, and then conduct hierarchical gradient design based on the optimized base parameters. The hierarchical gradient design is based on the constant mass volume of the base and taking cell wall thickness and concave angle as independent variables to design the honeycomb layer with the pathwise thickness gradient, the inverse thickness gradient, the pathwise angle gradient, the inverse angle gradient. The results show that the cylindrical honeycomb base has higher specific stiffness and stronger bearing capacity compared with the regular square base. In addition, this study also indicate that compared with uniform parameter design, thickness gradient design has better vibration isolation performance, inverse thickness gradient design has the best vibration isolation effect, and angle gradient design has no obvious influence on vibration isolation performance.

Key words： Stratification gradient Cylindrical honeycomb base Optimization design Performance of vibration isolation

收稿日期: 2022-01-10 出版日期: 2023-03-15

引用本文:

黄江成1，肖正明1，刘涛1，刘卫标2. 考虑分层梯度的筒状蜂窝基座隔振性能研究[J]. 振动与冲击, 2023, 42(5): 13-20.
HUANG Jiangcheng1, XIAO Zhengming1, LIU Tao1, LIU Weibiao2. Vibration isolation performance of cylindrical honeycomb base considering layered gradient. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(5): 13-20.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I5/13

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