BANDGAP OPTIMIZATION DESIGN OF PHONONIC CRYSTALS BASED ON SHAPE MEMORY ALLOY

被引：0
|
作者：
Qiu K. [1 ]
Chen Z. [1 ,2 ]
Zhang J. [1 ]
Zhang W. [1 ]
Yan Q. [3 ]
Sun X. [3 ]
Peng T. [3 ]
机构：
[1] Shaanxi Key Laboratory of Aerospace Structures, Northwestern Polytechnical University, Xi’an
[2] Chengdu Aircraft Industry (Group) Co., Ltd., Chengdu
[3] Key Laboratory of Aeronautical Acoustics and Dynamic Strength Aviation Science and Technology, AVIC Aircraft Strength Research Institute, Xi’an
来源：
Lixue Xuebao/Chinese Journal of Theoretical and Applied Mechanics | 2023年 / 55卷 / 06期
关键词：
controllable band gaps; phononic crystal; sensitivity analysis; shape memory alloy; topology optimization;
D O I：
10.6052/0459-1879-23-024
中图分类号：
学科分类号：
摘要：
Phononic crystal is a kind of periodic structures with the phononic band gap. The dynamically controllable design of its band gap could improve the vibration and noise reduction performance of major equipment in the aerospace field. In the work, smart materials are introduced for band gap design of phononic crystals. And the topological optimization method is used to design the multifunctional phononic crystal with the dynamically controllable band gaps. Firstly, the band gap of phononic crystals are computed by finite element analysis. Simultaneously, the temperature constitutive model of shape memory alloy is established. Secondly, based on variable density method, topology optimization model is established with maximizing the relative band gap under the specific volume ratio and strength constraints. At the same time, the connectivity constraints among phononic crystal unit cells must be ensured. Lastly, the band gaps of multifunctional phononic crystals are optimized by using the moving asymptotic method. During the optimization process, the design sensitivities are calculated with the improved material interpolation model. The optimization results show that the band gap is widened by 103.9% in XY mode with the transformation of shape memory alloy from martensite to austenite. And the bandwidth is increased by 3.75 times in Z mode. This research provides an effective design way for more actively control the phononic crystals band gaps in the complex application environments. And the novel phononic crystals have a wider application prospect. © 2023 Chinese Journal of Theoretical and Applied Mechanics Press. All rights reserved.
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页码：1278 / 1287
页数：9
相关论文
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