梁板结构中弯曲波的低频宽带完美吸收

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关键词：完美吸收；弯曲波；低频宽带；遗传算法 中图分类号： 0347.4+1 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202403056

Low-frequency broadband perfect absorption of flexural waves in beam and plate structures

ZHANG Mengjia 1，3 ，MA Xiaoyun²， SHEN Yizhou13，AN Rong1，³， ZUO Ang1，3， XU Yanlong134， YANG Zhichun1，3 （1.SchoolofAeroautics，NrthwestePolyechicalUniversity，Xi'an0，China；2Unit9596，Peoplesiberationyofin， Xi'an 710089，China；3.National Key Laboratory of Strength and Structural Integrity，Xi'an 710072，China; 4.State Key Laboratory for Strength and Vibration of Mechanical Structures， Xi'an 710049，China）

Abstract：Perfectabsoptioleadyasamatureteoyinthefieldsoflectromagnetismandacoustics，butintfeldoflasticaves， therearefeoogsertallatodsattboli only0.5.Byrod anabsorptionoecetofearlyFuteorelow-freqecybodandpefectabsotionstructurefortebaasdsieoug paralelcouplngetweoilasdoanasadutotssisensoasaesdtcebddt from 350Hz to 600Hz ，with anaverage absorption coefficient higher than O.95.This structure can also have a good absorption effect on an infiniteplate，withanabsorptioncoefficient exceeding O.95 for incident angles between -40∘ and 40∘ .Theresearch in this paper provides ideas andmethodsforthedsignofbeam-platebroadbandperfectabsorptionstructures，expands teresearchonresonatorsinsuprsingbnding wave transmission， and is expected to develop a way of vibration suppression.

Keywords：perfectabsorption; flexural wave;low-frequency broadband;geneticalgorithm

结构振动并产生噪声辐射的本质原因通常可归结于结构中的弹性波传播效应。（剩余13471字）