Wave Motion最新文献_第8页

Mode conversions and intersections of Lamb waves in one-dimensional hexagonal piezoelectric quasicrystal nanoplates based on the integral nonlocal theory 基于积分非局域理论的一维六边形压电准晶纳米片Lamb波的模态转换与相交

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-12-14 DOI: 10.1016/j.wavemoti.2024.103479

Xinxin Wang , Jiangong Yu , Bo Zhang , Lahoucine Elmaimouni , Pingmei Ming

{"title":"Mode conversions and intersections of Lamb waves in one-dimensional hexagonal piezoelectric quasicrystal nanoplates based on the integral nonlocal theory","authors":"Xinxin Wang , Jiangong Yu , Bo Zhang , Lahoucine Elmaimouni , Pingmei Ming","doi":"10.1016/j.wavemoti.2024.103479","DOIUrl":"10.1016/j.wavemoti.2024.103479","url":null,"abstract":"<div><div>Phonon, phason, and electrical coupling characteristics of Lamb waves in one-dimensional hexagonal piezoelectric quasicrystal nanoplates are studied by accounting for the nonlocal effect. The coupled dynamic models are derived based on the integral form of nonlocal theory and linear elasticity theory of piezoelectric quasicrystal. Subsequently, dispersion curves and displacement distributions are computed employing the Legendre orthogonal polynomial method. All influences of the phonon-phason coupling, piezoelectric and nonlocal effects on the wave characteristics are analyzed. Furthermore, a detailed analysis of the interaction between piezoelectric and nonlocal effects is provided. The results indicate that mode conversions take place when adjacent phonon and phason modes exhibit the same displacement symmetry, while mode intersections occur when the adjacent phonon and phason modes exhibit different displacement symmetries. The coupling of phonon and phason fields induces the mode conversion, and phonon-phason coupling and piezoelectric effect amplifies this phenomenon. The piezoelectric effect enhances the nonlocal effect, whereas the nonlocal effect weakens the piezoelectric effect, with a more pronounced interaction observed in phonon modes. The obtained results establish a theoretical reference for the design and optimization of piezoelectric nanoscale devices.</div></div>","PeriodicalId":49367,"journal":{"name":"Wave Motion","volume":"134 ","pages":"Article 103479"},"PeriodicalIF":2.1,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The secular equation for elastic surface waves under boundary conditions of impedance type: A perspective from linear algebra 阻抗型边界条件下弹性表面波的长期方程：线性代数的视角

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-12-14 DOI: 10.1016/j.wavemoti.2024.103476

Fabio Vallejo

{"title":"The secular equation for elastic surface waves under boundary conditions of impedance type: A perspective from linear algebra","authors":"Fabio Vallejo","doi":"10.1016/j.wavemoti.2024.103476","DOIUrl":"10.1016/j.wavemoti.2024.103476","url":null,"abstract":"<div><div>Elastic surface waves under impedance boundary conditions are of great interest in a wide range of problems. However, the analysis of the associated secular equation, which provides the speed of the surface wave, is limited to specific cases due to its complicated nature. This work presents an alternative method, based on linear algebra tools, to deal with the secular equation for surface waves in an isotropic elastic half-space subjected to boundary conditions of impedance type. Our analysis shows that the associated secular equation does not vanish in the upper complex half-plane including the real axis. This implies the well-posedness of the problem. Interestingly, the full impedance boundary conditions proposed by Godoy et al. (2012) arise as a limit case. An approximation technique is introduced to extend the analysis from the considered problem to Godoy’s impedance boundary conditions. As a result, it is showed that the secular equation with full Godoy’s impedance boundary conditions does not vanish outside the real axis for arbitrary non-zero impedance parameter values. This is a crucial property for the well-posedness of the boundary value problem of partial differential equations, and thus crucial for the model to explain surface wave propagation. However, it has been verified only for particular cases of the latter class of boundary conditions including the stress-free case. The existence of a surface wave with a complex valued velocity is proved for a particular case.</div></div>","PeriodicalId":49367,"journal":{"name":"Wave Motion","volume":"134 ","pages":"Article 103476"},"PeriodicalIF":2.1,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Atmospheric pressure-driven surface wave propagation in a compressible ocean including static compression 大气压力驱动的表面波在可压缩海洋中的传播，包括静态压缩

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-12-09 DOI: 10.1016/j.wavemoti.2024.103468

Ravindra Pethiyagoda , Santu Das , Michael H. Meylan

{"title":"Atmospheric pressure-driven surface wave propagation in a compressible ocean including static compression","authors":"Ravindra Pethiyagoda , Santu Das , Michael H. Meylan","doi":"10.1016/j.wavemoti.2024.103468","DOIUrl":"10.1016/j.wavemoti.2024.103468","url":null,"abstract":"<div><div>The surface waves generated by a moving atmospheric pressure field are calculated, including both the effects of compressibility and static background compression of the ocean. The solution is found by using the Laplace transformation in time and the Fourier transformation in space. The Laplace transform is inverted analytically, and the Fourier transform is inverted numerically to obtain the solution in the time domain. The impact of ocean compressibility and static compression on the three wave modes, namely the wave locked with the pressure field and the two free waves propagating in opposite directions, induced by an initial pressure field, is demonstrated. The inclusion of compressibility of the water reduces the phase speed of the waves. Although the complexity of the mathematical problem increases when static compression is included, we show that its impact on phase speed is as significant as compression alone. Further effects are observed as a result of compressibility. The free surface near the initial centre of the pressure field oscillates, and the phase of this oscillation changes when static compression is included. Also, acoustic-gravity modes are excited, dominated by the first mode. The evolution of waves over time shows the significant impact of the compressibility of the water.</div></div>","PeriodicalId":49367,"journal":{"name":"Wave Motion","volume":"134 ","pages":"Article 103468"},"PeriodicalIF":2.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modulation theory of soliton−mean flow in Korteweg–de Vries equation with box type initial data 具有箱型初始数据的Korteweg-de Vries方程中孤子-平均流的调制理论

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-12-06 DOI: 10.1016/j.wavemoti.2024.103467

Ruizhi Gong, Deng-Shan Wang

{"title":"Modulation theory of soliton−mean flow in Korteweg–de Vries equation with box type initial data","authors":"Ruizhi Gong, Deng-Shan Wang","doi":"10.1016/j.wavemoti.2024.103467","DOIUrl":"10.1016/j.wavemoti.2024.103467","url":null,"abstract":"<div><div>For the Korteweg–de Vries equation with box type initial data, the interaction between a trial soliton and large-scale dispersive mean flow is studied theoretically and numerically. The pure box initial value can cause rarefaction wave and dispersive shock wave, and can create an area of soliton train. The key to the interaction of soliton and mean flow is that the dynamic evolutions of the mean flow and the local soliton can be described by the same modulation system. The soliton modulation system is derived from the degenerations of the two-genus Whitham modulation system. Considering the influence of rarefaction wave, dispersive shock wave and soliton train on the trial soliton, in the framework of Whitham modulation theory, the equation describing the soliton trajectory and the changes in amplitude and phase shift are given explicitly. The predicted results are compared with the numerical simulations, which verifies the corrections of the theoretical analysis. The exotic interaction phenomena between soliton and mean flow found in this work have broad applications to shallow water soliton propagations and real soliton experiments in fluid dynamics.</div></div>","PeriodicalId":49367,"journal":{"name":"Wave Motion","volume":"134 ","pages":"Article 103467"},"PeriodicalIF":2.1,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamics of localized waves and interactions in a (2+1)-dimensional equation from combined bilinear forms of Kadomtsev–Petviashvili and extended shallow water wave equations Kadomtsev-Petviashvili和扩展浅水波方程双线性组合形式下（2+1）维方程的局域波动力学和相互作用

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-11-28 DOI: 10.1016/j.wavemoti.2024.103455

Majid Madadi , Mustafa Inc

引用次数: 0

Transient longitudinal waves in 2D square lattices with Voigt elements under concentrated loading 集中荷载作用下具有Voigt单元的二维方格的瞬态纵波

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-11-24 DOI: 10.1016/j.wavemoti.2024.103457

Nadezhda I. Aleksandrova

引用次数: 0

Hamiltonian formulation for interfacial periodic waves propagating under an elastic sheet above stratified piecewise constant rotational flow 层状分段恒定旋转流上弹性片下传播界面周期波的哈密顿公式

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-11-22 DOI: 10.1016/j.wavemoti.2024.103454

Călin-Iulian Martin , Emilian I. Părău

引用次数: 0

Exotic coherent structures and their collisional dynamics in a (3+1) dimensional Bogoyavlensky–Konopelchenko equation （3+1）维Bogoyavlensky-Konopelchenko方程中的奇异相干结构及其碰撞动力学

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-11-21 DOI: 10.1016/j.wavemoti.2024.103456

C. Senthil Kumar , R. Radha

引用次数: 0

Low mode interactions in water wave model in triangular domain 三角域水波模型的低模态相互作用

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-11-21 DOI: 10.1016/j.wavemoti.2024.103453

P. Panayotaros , R.M. Vargas-Magaña

引用次数: 0

Analytical and numerical study of plane progressive thermoacoustic shock waves in complex plasmas 复杂等离子体中平面渐进热声激波的分析与数值研究

IF 2.1 3区物理与天体物理

Wave Motion Pub Date : 2024-11-21 DOI: 10.1016/j.wavemoti.2024.103451

A.P. Misra, Gadadhar Banerjee

{"title":"Analytical and numerical study of plane progressive thermoacoustic shock waves in complex plasmas","authors":"A.P. Misra, Gadadhar Banerjee","doi":"10.1016/j.wavemoti.2024.103451","DOIUrl":"10.1016/j.wavemoti.2024.103451","url":null,"abstract":"<div><div>The formation of thermoacoustic shocks is studied in a fluid complex plasma. The thermoacoustic wave mode can be damped (or anti-damped) when the contribution from the thermoacoustic interaction is lower (or higher) than that due to the particle collision and/or the kinematic viscosity. In the nonlinear regime, the thermoacoustic wave, propagating with the acoustic speed, can evolve into small amplitude shocks whose dynamics are governed by the Bateman-Burgers equation with an additional nonlinear term that appears due to the particle collision and nonreciprocal interactions of charged particles providing the thermal feedback. The appearance of such nonlinearity can cause the shock fronts to be stable (or unstable) depending on the collision frequency remains below (or above) a critical value and the thermal feedback is positive. The existence of different kinds of shocks and their characteristics are analyzed analytically and numerically with the system parameters that characterize the thermal feedback, thermal diffusion, heat capacity per fluid particle, the particle collision and the fluid viscosity. A good agreement between analytical and numerical results is also noticed.</div></div>","PeriodicalId":49367,"journal":{"name":"Wave Motion","volume":"133 ","pages":"Article 103451"},"PeriodicalIF":2.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0