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The Bianisotropic Formulation of the Plane Wave Method from Faraday’s and Ampere’s Laws 认领 引用
1
作者 Robert Gauthier 《Optics and Photonics Journal》 2021年第8期360-386,共27页
The plane wave numerical technique is recast from Ampere’s and Faraday’s laws for materials that are characterized with a bianisotropic form of the constitutive relations. The populating expressions are provided for... The plane wave numerical technique is recast from Ampere’s and Faraday’s laws for materials that are characterized with a bianisotropic form of the constitutive relations. The populating expressions are provided for the eigenvalue matrix system that can be directly solved for the angular frequencies and field profiles when bianisotropy is included. To demonstrate the computation process and expected state diagrams and field profiles, numerical computation examples are provided for a bianisotropic Bragg Array with central defect. It is shown that the location of the magnetoelectric tensor elements has a significant effect on the eigenstates of an equivalent isotropic (anisotropic) structure. One form of the magnetoelectric tensor (diagonal elements only) leads to the observation of merging states and the formation of exceptional points. The numerical approach presented can be implemented as an add-on to the familiar plane wave numerical technique. 展开更多
关键词 Bianisotropic Magnetoelectric Plane Wave Method Exceptional Point
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Calculation of Valence Subband Structures for Strained Quantum-Wells by Plane Wave Expansion Method Within 6×6 Luttinger-Kohn Model 认领 引用 被引量：2
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作者 国伟华 黄永箴 《Journal of Semiconductors》 CAS 北大核心 2002年第6期577-581,共5页
The valence subband energies and wave functions of a tensile strained quantum well are calculated by the plane wave expansion method within the 6×6 Luttinger Kohn model.The effect of the number and period of plan... The valence subband energies and wave functions of a tensile strained quantum well are calculated by the plane wave expansion method within the 6×6 Luttinger Kohn model.The effect of the number and period of plane waves used for expansion on the stability of energy eigenvalues is examined.For practical calculation,it should choose the period large sufficiently to ensure the envelope functions vanish at the boundary and the number of plane waves large enough to ensure the energy eigenvalues keep unchanged within a prescribed range. 展开更多
关键词 semiconductor optical amplifier strained quantum well plane wave expansion method polarization
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A 1D time-domain method for in-plane wave motions in a layered half-space 认领 引用 被引量：10
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作者 Jingbo Liu Yan Wang 《Acta Mechanica Sinica》 SCIE EI CAS 2007年第6期673-680,共8页
A 1D finite element method in time domain is developed in this paper and applied to calculate in-plane wave motions of free field exited by SV or P wave oblique incidence in an elastic layered half-space. First, the l... A 1D finite element method in time domain is developed in this paper and applied to calculate in-plane wave motions of free field exited by SV or P wave oblique incidence in an elastic layered half-space. First, the layered half-space is discretized on the basis of the propagation characteristic of elastic wave according to the Snell law. Then, the finite element method with lumped mass and the central difference method are incorporated to establish 2D wave motion equations, which can be transformed into 1D equations by discretization principle and explicit finite element method. By solving the 1D equations, the displacements of nodes in any vertical line can be obtained, and the wave motions in layered half-space are finally determined based on the characteristic of traveling wave. Both the theoretical analysis and the numerical results demonstrate that the proposed method has high accuracy and good stability. 展开更多
关键词 In-plane wave Oblique incidence Time-domain method Snell law
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Dynamic soil-tunnel interaction in layered half-space for incident plane SH waves 认领 引用 被引量：10
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作者 Fu Jia Liang Jianwen Qin Lin 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2016年第4期715-727,共13页
The dynamic soil-tunnel interaction is studied by indirect boundary element method （IBEM）, using the model of a rigid tunnel in layered half-space, which is simplified to a single soil layer on elastic bedrock, subj... The dynamic soil-tunnel interaction is studied by indirect boundary element method （IBEM）, using the model of a rigid tunnel in layered half-space, which is simplified to a single soil layer on elastic bedrock, subjected to incident plane SH waves. The accuracy of the results is verified through comparison with the analytical solution. It is shown that soil-tunnel interaction in layered half-space is larger than that in homogeneous half-space and this interaction mechanism is essentially different from that of soil-foundation-superstructure interaction. 展开更多
关键词 underground tunnel layered half-space plane SH wave indirect boundary element method soil-tunnel interaction site dynamic characteristics
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2.5D scattering of incident plane SV waves by a canyon in layered half-space 认领 引用 被引量：13
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作者 Ba Zhenning Liang Jianwen 《Earthquake Engineering and Engineering Vibration》 SCIE EI 2010年第4期587-595,共9页
This paper presents a 2.5D scattering of incident plane SV waves by a canyon in a layered half-space by using the indirect boundary element method （IBEM）. A free field response analysis is performed to provide the d... This paper presents a 2.5D scattering of incident plane SV waves by a canyon in a layered half-space by using the indirect boundary element method （IBEM）. A free field response analysis is performed to provide the displacements and stresses on the boundary of the canyon where fictitious uniform moving loads are applied to calculate the Green＇s fi.mctions for the displacements and stresses. The amplitudes of the loads are determined by the boundary conditions. The free field displacements are added to the fictitious uniform moving loads induced displacements and the total response is obtained. Numerical calculations are performed for a canyon with homogenous and in one layer over bedrock. The effects of the thickness and stiffness of the layer on the amplification are studied and discussed. 展开更多
关键词 layered half-space canyon plane SV wave amplification scattering surface layer indirect boundaryelement method
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Impedance Analytical Method of Wave Run-up and Reflection from A Slotted-Wall Caisson Breakwater 认领 引用 被引量：3
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作者 朱大同 《China Ocean Engineering》 SCIE EI 2010年第3期453-465,共13页
An impedance analytical method （IAM） is developed to study the interaction of plane water wave with a slotted-wall caisson breakwater. The non-linear boundary condition at the slotted-wall is expressed in terms of f... An impedance analytical method （IAM） is developed to study the interaction of plane water wave with a slotted-wall caisson breakwater. The non-linear boundary condition at the slotted-wall is expressed in terms of flow resistance. A set of algebraic expressions are obtained for free surface elevation inside and outside chamber, and reflection coefficient. The prediction of the reflection coefficients shows that the relative widths of the chamber inducing the minimum reflection coefficient for a slotted-wall caisson breakwater are in a range of 0.10～0.20, which are smaller than that （0.15～0.25） for a perforated-wall caisson breakwater. The reflection coefficients and free surface elevation obtained by the present model are compared with that of laboratory experiments carried out by previous researchers. 展开更多
关键词 plane wave slotted-wall caisson wave reflection wave run-up impedance analytical method （IAM）
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Analysis and optimization of bandgaps in plate-type metastructures with different configurations 认领 引用
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作者 Fenglian LI Yin ZHU Junhui YAN 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2026年第4期839-858,共20页
Several types of acoustic metamaterial(AM)plates have been developed to achieve low-frequency and wide bandgaps,which are adjusted by their geometric configurations and material properties.This paper combines the clas... Several types of acoustic metamaterial(AM)plates have been developed to achieve low-frequency and wide bandgaps,which are adjusted by their geometric configurations and material properties.This paper combines the classical plate theory and the characteristics of piezoelectric materials,and uses the plane wave expansion method(PWEM)to derive the bandgap theoretical model of plate-type metastructures.The dispersion curves of the structures composed of elastic materials,piezoelectric materials,and functionally graded(FG)materials are compared and studied,and verified with the finite element simulation results.Then,the effects of temperatures,piezoelectric parameters,scatterer shapes,scatterer distributions,scatterer tapers,rubber layers,and spiral groove configurations on the bandgap of plate-type metastructures are discussed,and the material and geometric parameters are optimized with the genetic algorithm(GA).This study provides a reference for the design of low-frequency broadband structures. 展开更多
关键词 plate-type metastructure plane wave expansion method(PWEM) bandgap optimization
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非平面波输入的黏弹性边界的模拟精度 认领 引用
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作者 丁海平 吴镕锦 +1 位作者 宋贞霞 徐正洋 《地震工程与工程振动》 CSCD 北大核心 2026年第2期198-207,共10页
本文对幅值和相位均不一致的非平面地震波入射条件下黏弹性边界的模拟精度进行了验证。首先假定了2个位置不同的点源,基于内位错点源理论,采用谱元法分别模拟了幅值和相位均存在差异的非平面波。随后,建立了二维均匀半空间场地、凸起地... 本文对幅值和相位均不一致的非平面地震波入射条件下黏弹性边界的模拟精度进行了验证。首先假定了2个位置不同的点源,基于内位错点源理论,采用谱元法分别模拟了幅值和相位均存在差异的非平面波。随后,建立了二维均匀半空间场地、凸起地形和凹陷地形等3种典型场地模型,针对非平面波输入开展了场地地震响应数值模拟,对比分析了各观测点的位移时程曲线和位移峰值与精确解的吻合程度。结果表明,在所有模型中,各观测点的位移时程曲线与精确解吻合良好;位移峰值的相对误差除个别观测点外均小于1%;黏弹性边界在非平面波入射条件下同样具有较高的模拟精度。 展开更多
关键词 非平面地震波 位错点源 黏弹性边界 地震响应 谱元法
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基于CNN-POCS重构的Marchenko成像方法 认领 引用
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作者 徐梓涵 曲英铭 +1 位作者 徐飞 司恒旭 《石油地球物理勘探》 EI CSCD 北大核心 2026年第1期123-131,共9页
Marchenko方法利用地表反射响应和宏观速度模型可以重构地下任意位置处的格林函数,进而实现对地质目标的精确成像。与传统地震干涉法相比,Marchenko成像结果不会受到上覆介质的影响。然而,其成像质量取决于检波点布设密度,实际数据往往... Marchenko方法利用地表反射响应和宏观速度模型可以重构地下任意位置处的格林函数,进而实现对地质目标的精确成像。与传统地震干涉法相比,Marchenko成像结果不会受到上覆介质的影响。然而,其成像质量取决于检波点布设密度,实际数据往往不能满足要求。为解决这一问题,文中提出了一种基于卷积神经网络凸集投影(CNN-POCS)重构的Marchenko成像方法。首先,将稀疏采集的地震数据应用CNN-POCS方法进行重构,获得高精度空间密集采样的地震数据;然后,再针对目标区域进行Marchenko成像,这样既有效降低了对高密度采集的要求,又保证了成像质量;最后,将该方法扩展到平面波成像,提高了传统点源方法的计算效率、降低了计算成本。模型试算结果表明,该方法可以减少60%的检波点布设,从而显著降低采集成本。 展开更多
关键词 Marchenko成像 稀疏采集 地震数据重构 平面波方法
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基于平面波-模态匹配结合法的管壳式换热器管程声传递特性分析 认领 引用
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作者 尹晨浩 刘进伟 +3 位作者 王子樊 华如南 冯海天 方智 《振动与冲击》 EI CSCD 北大核心 2026年第13期223-231,250,共9页
以管壳式换热器为研究对象,基于平面波-模态匹配结合的方法求解其管程声传递特性。根据换热器内部声场分布不同将其划分成不同的声学区域,管径较小的换热管束部分采用平面波理论计算声传递矩阵,具有较大管径的进出口封头部分采用三维模... 以管壳式换热器为研究对象,基于平面波-模态匹配结合的方法求解其管程声传递特性。根据换热器内部声场分布不同将其划分成不同的声学区域,管径较小的换热管束部分采用平面波理论计算声传递矩阵,具有较大管径的进出口封头部分采用三维模态匹配方法计算其声传递矩阵,利用轴向交界面处的声压与质点振速连续条件求解管壳式换热器管程声传递特性。利用该方法和三维有限元仿真方法计算管壳式换热器在10.00~2000.00 Hz频率内的管程声传递特性,与三维有限元仿真结果相比,该方法计算效率较高,且计算精度一致。进而利用该计算方法分析了不同参数对换热器管程声传递特性的影响。 展开更多
关键词 换热器 平面波 模态匹配法 传递矩阵 传递损失
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Effects of orientation and shape of holes on the band gaps in water waves over periodically drilled bottoms 认领 引用 被引量：2
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作者 钟兰花 吴福根 钟会林 《Chinese Physics B》 SCIE EI CAS 2010年第2期19-23,共5页
The complete band gaps （CBGs） of shallow water waves propagating over bottoms with periodically drilled holes are investigated numerically by the plane wave expansion method. Four different patterns are considered, ... The complete band gaps （CBGs） of shallow water waves propagating over bottoms with periodically drilled holes are investigated numerically by the plane wave expansion method. Four different patterns are considered, containing triangular, square, hexagonal and circular cross-sectioned holes arranged into triangular lattices. Results show that the width of CBGs can be changed by adjusting the orientation of noncircular holes and the effect of hole shape on the width of the maximal CBGs is discussed. 展开更多
关键词 water surface wave band gap plane wave expansion method
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基于射线声学的浅海目标前向散射声场建模 认领 引用
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作者 罗嘉辉 孙超 雷波 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2026年第4期727-736,共10页
为了解决浅海波导环境中目标前向散射声场受目标散射特性与环境声传播特性影响,导致声场计算十分复杂的问题,本文提出一种基于射线声学的浅海目标前向散射声场计算方法。结合射线声学理论与平面波散射函数,基于虚源法理论推导了Pekeris... 为了解决浅海波导环境中目标前向散射声场受目标散射特性与环境声传播特性影响,导致声场计算十分复杂的问题,本文提出一种基于射线声学的浅海目标前向散射声场计算方法。结合射线声学理论与平面波散射函数,基于虚源法理论推导了Pekeris波导环境中刚性目标前向散射声场的远场计算公式,揭示了浅海信道与自由空间中目标散射声场的耦合关系,明确了声波的传播路径。根据所建立的模型,仿真计算了半径5 m的刚性球体的前向散射声场。研究结果表明,该射线模型下的目标前向散射声场计算结果与简正波模型下的目标前向散射声场的计算结果具有较好的一致性。本文射线模型表征声波在浅海波导环境中的声传播几何路径,物理内涵清晰。 展开更多
关键词 浅海波导 射线声学 前向散射 声场建模 虚源法 刚性球体 平面波散射函数 声传播路径
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3D Diffraction of obliquely incident SH waves by twin infinitely long cylindrical cavities in layered poroelastic half-space 认领 引用 被引量：2
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作者 Jianwen Liang Bing Han Zhenning Ba 《Earthquake Science》 2013年第6期395-406,共12页
Abstract This paper studies three-dimensional diffraction of obliquely incident plane SH waves by twin infinitely long cylindrical cavities in layered poroelastic half-space using indirect boundary element method. The... Abstract This paper studies three-dimensional diffraction of obliquely incident plane SH waves by twin infinitely long cylindrical cavities in layered poroelastic half-space using indirect boundary element method. The approach is validated by comparison with the literature, and the effects of cavity interval, incident frequency, and boundary drainage condition on the diffraction are studied through numerical examples. It is shown that, the interaction between two cavities is significant and surface displacement peaks become large when two cavities are close, and the surface displacement may be significantly amplified by twin cavities, and the influence range with large amplification can be as wide as 40 times of the cavity radius. Surface displacements in dry poroelastic case and saturated poroelastic cases with drained and undrained boundaries are evidently different under certain circumstances, and the differences may be much larger than those in the free-field response. 展开更多
关键词 Diffraction Infinitely long cylindricalcavities Obliquely incidence Layered poroelastichalf-space Indirect boundary element method（IBEM） Amplification Plane SH waves
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InGaAs短波红外焦平面特性参数测试方法 认领 引用
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作者 王力霞 冯巍巍 +2 位作者 陈扬 乔建社 徐俊杰 《半导体光电》 CAS 北大核心 2026年第2期315-319,共5页
铟镓砷短波红外焦平面探测器性能的精确评估对于应用系统的成像质量与定量化分析至关重要。为验证积分球均匀光源在铟镓砷短波红外焦平面探测器特性参数测试中的可行性,采用积分球均匀光源与高温黑体分别作为均匀光源,对不同阵列规模与... 铟镓砷短波红外焦平面探测器性能的精确评估对于应用系统的成像质量与定量化分析至关重要。为验证积分球均匀光源在铟镓砷短波红外焦平面探测器特性参数测试中的可行性,采用积分球均匀光源与高温黑体分别作为均匀光源,对不同阵列规模与像元尺寸的探测器进行响应率非均匀性与有效像元率对比测试。实验结果表明,积分球均匀光源测试所得响应率非均匀性指标均优于黑体光源,其中在2560×2048阵列规模下,响应率非均匀性由4.57%降至2.85%,相对改善幅度达60.35%;有效像元率由99.978%提升至99.984%。进一步分析表明,积分球均匀光源可有效消除黑体光源因朗伯辐射特性引入的辐照度分布不均与背景噪声影响,测试结果更接近器件真实性能,且操作更为便捷。 展开更多
关键词 铟镓砷 短波红外焦平面 特性参数 测试方法
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二维情形下非平面波输入的多次透射公式的模拟精度 认领 引用
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作者 蒯长广 马俊玲 +1 位作者 丁海平 吴镕锦 《苏州科技大学学报（工程技术版）》 CAS 2026年第1期10-15,共6页
复杂场地地震响应分析需要引入人工边界,其中多次透射边界是常用人工边界之一。透射边界精度的验证通常采用平面波P波和SV波输入,而对于非平面波入射下透射边界的精度问题,则少有研究。首先利用谱元法基于震源破裂产生非平面波输入地震... 复杂场地地震响应分析需要引入人工边界,其中多次透射边界是常用人工边界之一。透射边界精度的验证通常采用平面波P波和SV波输入,而对于非平面波入射下透射边界的精度问题,则少有研究。首先利用谱元法基于震源破裂产生非平面波输入地震波,然后对二维均匀半空间、凸起和凹陷地形等三种不同场地模型进行非平面波输入的地震响应数值模拟。结果表明:透射边界在非平面波入射下同样具有较高的模拟精度。 展开更多
关键词 非平面地震波 复杂场地 透射边界 地震响应 谱元法
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Electro-mechanical coupling wave propagating in a locally resonant piezoelectric/elastic phononic crystal nanobeam with surface effects 认领 引用 被引量：8
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作者 Denghui QIAN 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2020年第3期425-438,共14页
The model of a "spring-mass" resonator periodically attached to a piezoelectric/elastic phononic crystal(PC) nanobeam with surface effects is proposed, and the corresponding calculation method of the band st... The model of a "spring-mass" resonator periodically attached to a piezoelectric/elastic phononic crystal(PC) nanobeam with surface effects is proposed, and the corresponding calculation method of the band structures is formulized and displayed by introducing the Euler beam theory and the surface piezoelectricity theory to the plane wave expansion(PWE) method. In order to reveal the unique wave propagation characteristics of such a model, the band structures of locally resonant(LR) elastic PC Euler nanobeams with and without resonators, the band structures of LR piezoelectric PC Euler nanobeams with and without resonators, as well as the band structures of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on PZT-4, with resonators attached on epoxy, and without resonators are compared. The results demonstrate that adding resonators indeed plays an active role in opening and widening band gaps. Moreover, the influence rules of different parameters on the band gaps of LR elastic/piezoelectric PC Euler nanobeams with resonators attached on epoxy are discussed, which will play an active role in the further realization of active control of wave propagations. 展开更多
关键词 locally resonant(LR)piezoelectric/elastic phononic crystal(PC)nanobeam surface effect plane wave expansion(PWE)method spring-mass resonator
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A Method for Increasing X-ray Protection Capability Based on Photonic Crystal Technology 认领 引用
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作者 LI Ping QIAO Xiao-lan +2 位作者 ZHAO Peng LUO En-si YANG Chao 《Chinese Journal of Biomedical Engineering(English Edition)》 CAS CSCD 2016年第2期76-80,共5页
In this paper, we propose a method to improve anti-radiation capability by coating heavy metal X-ray protection glass with compound photonic crystal layers, based on the unique property of photonic crystal that light ... In this paper, we propose a method to improve anti-radiation capability by coating heavy metal X-ray protection glass with compound photonic crystal layers, based on the unique property of photonic crystal that light cannot be propagated within the range of band gaps. Using the plane wave expansion method,we made a theoretical study of parameters affecting the band gap structures of one-dimensional photonic crystals. Based on the findings, we chose appropriate materials and compound structure of photonic crystal so as to get high X-ray reflection coating photonic crystal layers. By this method, the reflection rate within X-ray wavelength can reach the maximum value of 100%, and the average value of over 90%. Even low-cost heavy metal X-ray protection glass of absorption coefficient value can achieve the desired effect. Thus, this method greatly decreases the anti-radiation requirements of heavy X-ray protection glass. 展开更多
关键词 phtonic crystals plane-wave expansion method band gap X-ray protection
Study on band gaps and defect bands in tunable phononic crystal plates with elastic foundations 认领 引用
18
作者 HONG Jun GAO Xingyu +1 位作者 LI Ke WANG Shaopeng 《Journal of Southeast University(English Edition)》 EI CAS 2025年第2期164-170,共7页
To analyze the band gap characteristics of phononic crystals,a two-dimensional phononic crystal plate model with an elastic foundation was first established.The plane wave expansion method was used to compute the disp... To analyze the band gap characteristics of phononic crystals,a two-dimensional phononic crystal plate model with an elastic foundation was first established.The plane wave expansion method was used to compute the dispersion curves of this phononic crystal model,and the results were compared with those from the finite element method to verify their accuracy.Subsequently,a parameter study explored the effects of the elastic foundation coeffi-cient and coverage ratio on the band gap.The results indicate that as the coverage ratio of the elastic foundation increases,the band gap significantly expands,reaching its maximum value at 100%coverage.Additionally,as the elastic foundation stiffness increases,the band gap gradually widens and converges toward fixed boundary conditions.The study also investigated the band gap of phononic crystal plates with defects,finding that the vibrational energy concentrates at the defect unit cell.Furthermore,the defect band frequency can be effectively modulated by adjusting the coefficient of the elastic foundation,providing a theoretical basis for achieving efficient energy conversion. 展开更多
关键词 phononic crystals elastic foundation band gap plane wave expansion method defect band
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二信道光子晶体滤波系统 认领 引用
19
作者 刘杰 卢辉东 +5 位作者 赵俊 董杰 胡延梅 温建蓉 邢琪 李鹏辉 《光学精密工程》 EI CAS CSCD 北大核心 2025年第8期1190-1201,共12页
根据耦合模理论和线缺陷波导、点缺陷谐振腔的控光特性,在二维四方晶格光子晶体中设计了一种由主波导、两个下载波导、两个谐振腔和两个反射腔组成的二信道滤波系统。基于平面波展开法计算了完整光子晶体、线缺陷波导的能带结构,分析了... 根据耦合模理论和线缺陷波导、点缺陷谐振腔的控光特性,在二维四方晶格光子晶体中设计了一种由主波导、两个下载波导、两个谐振腔和两个反射腔组成的二信道滤波系统。基于平面波展开法计算了完整光子晶体、线缺陷波导的能带结构,分析了点缺陷谐振腔的模态分布。基于时域有限差分法研究了滤波系统的传输特性,分析了反射壁、反射腔到谐振腔所在参考平面的距离取值呈线性变化时对系统下载效率的影响,并给出透射率峰值随它们的变化规律。根据计算结果指导滤波系统的仿真设计,模拟结果表明:该滤波系统能够把波长为λ1=1 561.2 nm,λ2=1 570.5 nm的光信号较为精准地耦合到各自下载波导中,对应的透射率分别为98.9%,97.2%,半峰全宽分别为3.3 nm,3.5 nm,品质因子分别为473,449,波长间隔为Δλ=9.3 nm。该滤波系统的尺寸为20.88μm×22.04μm,设计结构简单,工作波长容易调节,有利于大规模集成,可以为光通信领域光路集成设计提供一定的理论基础和思路。 展开更多
关键词 耦合模理论 波导 点缺陷谐振腔 平面波展开法 时域有限差分法 滤波器
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基于平面波展开法的周期声学黑洞板弯曲振动研究 认领 引用
20
作者 万志威 于子恒 +1 位作者 朱翔 李天匀 《哈尔滨工程大学学报》 EI CAS CSCD 北大核心 2025年第6期1105-1110,共6页
周期声学黑洞板具有阻抗周期变化的特性,本文通过平面波展开法求解了该结构的振动特性,构造了由同种材料构成且内部无阻抗突变的二维声子晶体板。基于Kirchhoff-Love薄板理论,采用平面波展开法研究了周期声学黑洞板的弯曲振动特性。采... 周期声学黑洞板具有阻抗周期变化的特性,本文通过平面波展开法求解了该结构的振动特性,构造了由同种材料构成且内部无阻抗突变的二维声子晶体板。基于Kirchhoff-Love薄板理论,采用平面波展开法研究了周期声学黑洞板的弯曲振动特性。采用有限元法验证了本文方法的正确性,并改变平面波的个数对结果进行了收敛性分析。改变声学黑洞的嵌入形式,分析了更易产生完全方向带隙的条形声学黑洞板的弯曲振动特性。分析表明增大声学黑洞半径,减小由于实际制造精度产生的额外截断厚度会使带隙向低频移动,且带隙宽度增加。 展开更多
关键词 声学黑洞板 周期结构 平面波展开法 带隙 弯曲振动 有限元法 波数 Kirchhoff-Love薄板理论
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