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Simulating the Gain of a Vertical Array in a Shallow Waveguide with a Rough Sea Surface 模拟具有粗糙海面的浅波导中垂直阵列的增益
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771023600651
M. A. Raevsky, V. G. Burdukovskaya
{"title":"Simulating the Gain of a Vertical Array in a Shallow Waveguide with a Rough Sea Surface","authors":"M. A. Raevsky,&nbsp;V. G. Burdukovskaya","doi":"10.1134/S1063771023600651","DOIUrl":"10.1134/S1063771023600651","url":null,"abstract":"<div><p>The influence of developed wind waves on the gain of a vertical array in shallow ocean waveguides is studied analytically and numerically. An algorithm is proposed for calculating the model correlation matrix of the signal at the aperture of the vertical array, taking into account the interference structure of the acoustic field in the sound channel. The antenna gain is analyzed for three spatial processing methods: standard phased array, optimal linear processing method, and optimal quadratic processing. The numerical simulation results for winter hydrological conditions in the Barents Sea are presented. The main focus is the dependence of the antenna gain values, “smoothed” on the scale of the interference structure of the acoustic field in the waveguide, the wind speed, and seabed sediment characteristics. The influence of intermode correlations on the results of gain simulation for various signal processing methods is analyzed in detail. It is shown that ignoring intermode correlations in the case of a vertical array leads to fundamentally erroneous results with optimal processing methods.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"350 - 359"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Analysis of Variations of Acoustical Structure and Physical Components in Seawater Column in the Southern Deep Basin of the Caspian Sea 里海南部深海盆地海水水柱声学结构和物理成分变化分析
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771023601255
S. Jamshidi
{"title":"Analysis of Variations of Acoustical Structure and Physical Components in Seawater Column in the Southern Deep Basin of the Caspian Sea","authors":"S. Jamshidi","doi":"10.1134/S1063771023601255","DOIUrl":"10.1134/S1063771023601255","url":null,"abstract":"<p>Variations of physical properties of seawater (sound speed, temperature, salinity, and density) over the southern shelf of the Caspian Sea were assessed. Furthermore, the effect of monthly changes in physical structure and layering procedure was evaluated on water characteristics. The influence of the thermal structure and stability of the water column in warm months on the sound speed was greater than that of the salinity parameter. Due to the high correlation between sound speed and temperature in the Caspian Sea water, their vertical structures are mostly correlated. The range of surface layer water changes was within 9–30°C during different months of the year. The water salinity in the areas away from the coast was measured around 12 to 12.5 PSU. The range of measured sound speed data in February was about 1450–1463 m/s, while the values recorded in June‑July were between 1501–1451 m/s. The results indicated formation of a deep acoustic channel in the middle and deep areas of the seawater column. The analysis revealed that the axis of the sound channel occurs at a depth of 140–150 m (intermediate layer) in warm months. The axis of the sound channel was located in upper layers in the warm months<i>.</i></p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"325 - 336"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Heat Capacity and Features of the Phonon Spectrum of Single Crystals of Solid Solutions of Yttrium–Lutetium Aluminum Garnets 钇镥铝石榴石固溶体单晶的热容量和声谱特征
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771024601559
S. A. Nikitov, A. V. Taranov, E. N. Khazanov, E. V. Charnaya, M. V. Likholetova, E. V. Shevchenko
{"title":"Heat Capacity and Features of the Phonon Spectrum of Single Crystals of Solid Solutions of Yttrium–Lutetium Aluminum Garnets","authors":"S. A. Nikitov,&nbsp;A. V. Taranov,&nbsp;E. N. Khazanov,&nbsp;E. V. Charnaya,&nbsp;M. V. Likholetova,&nbsp;E. V. Shevchenko","doi":"10.1134/S1063771024601559","DOIUrl":"10.1134/S1063771024601559","url":null,"abstract":"<p>The temperature dependences of the heat capacity were measured and the general patterns of the formation of the phonon spectrum of single crystals of solid solutions of yttrium-lutetium aluminum garnets Y<sub>3 – <i>x</i></sub>Lu<sub><i>x</i></sub>Al<sub>5</sub>O<sub>12</sub> at 0 ≤ <i>x</i> ≤ 3 were investigated in the temperature range from 1.9 to 220 K. According to the data obtained at temperatures below 10 K, the Debye temperatures were calculated. The features of the phonon spectrum in the intermediate temperature range are interpreted as a superposition of optical modes for yttrium and lutetium garnets. It is shown that the low heat capacity values due to the contribution of acoustic phonons for Y<sub>2.25</sub>Lu<sub>0.75</sub>Al<sub>5</sub>O<sub>12</sub> correlate with anomalies in the concentration dependences of the phonon transport, the absorption of acoustic waves, and the shape of the aluminum NMR line.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"259 - 263"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063771024601559.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Study on Impact of Variable Thermal Conductivity or Laser Pulse on Reflected Elastic Waves in a Semiconductor Medium 研究不同导热系数或激光脉冲对半导体介质中反射弹性波的影响
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771021100596
Ihtisham Ullah, Maaz Ali Khan, S. M. Abo-Dahab, Adiya Dar, M. Rafiq Sial, Mohamed Daher Albalwi, Adnan Jahangir
{"title":"Study on Impact of Variable Thermal Conductivity or Laser Pulse on Reflected Elastic Waves in a Semiconductor Medium","authors":"Ihtisham Ullah,&nbsp;Maaz Ali Khan,&nbsp;S. M. Abo-Dahab,&nbsp;Adiya Dar,&nbsp;M. Rafiq Sial,&nbsp;Mohamed Daher Albalwi,&nbsp;Adnan Jahangir","doi":"10.1134/S1063771021100596","DOIUrl":"10.1134/S1063771021100596","url":null,"abstract":"<p>The article focuses on studying the effect of variable thermal conductivity on the reflection of waves propagating through a medium. Considered solid is half space with semiconductor properties. Additionally, we have also introduced the concept of non-local thermoelasticity to develop a stress-strain relation. Using the Helmholtz decomposition principal, we have determined that three longitudinal waves and one transverse wave propagate through the medium after reflection. To account for the thermal signals generated by the elastic vibration, we have used a three-phase lag (3PL) heat conduction model. The numerical computation of the theoretical results is presented graphically for a specific medium. The study of elastic waves passing through the human body is used for diagnosis and treatment. Nature and characteristics of the materials can also be detected by evaluating the behavior of waves reflected and transmitted through them.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"278 - 287"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Internal Symmetric Lamb Waves for High Phase Velocities 高相位速度的内部对称λ波
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771023601358
V. V. Mokryakov
{"title":"Internal Symmetric Lamb Waves for High Phase Velocities","authors":"V. V. Mokryakov","doi":"10.1134/S1063771023601358","DOIUrl":"10.1134/S1063771023601358","url":null,"abstract":"<p>Symmetric Lamb waves with a phase velocity exceeding the expansion wave velocity in an infinite medium are considered. It has been proven that internal waves (i.e., solutions of the wave equation, which have zero values of the strain and stress components on the surface and nonzero values in the plate bulk) may exist in this region of phase velocities. Parameters of the internal waves (phase velocity, frequency, and wavelength) are calculated; it has been proven that frequencies of the internal waves with the same phase velocity make an arithmetic progression. Several internal waves are considered, and cross sections of the corresponding strained plates are presented (as well as the distributions of the maximum tension and shear values).</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"220 - 228"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Effect of 3D-Printing on the Elastic Properties of Filament ABS Polymer Specimens 三维打印对长丝 ABS 聚合物试样弹性特性的影响
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771023601383
A. B. Volodarskii, A. I. Kokshaiskii, N. I. Odina, A. I. Korobov, E. S. Mikhalev
{"title":"Effect of 3D-Printing on the Elastic Properties of Filament ABS Polymer Specimens","authors":"A. B. Volodarskii,&nbsp;A. I. Kokshaiskii,&nbsp;N. I. Odina,&nbsp;A. I. Korobov,&nbsp;E. S. Mikhalev","doi":"10.1134/S1063771023601383","DOIUrl":"10.1134/S1063771023601383","url":null,"abstract":"<p>The paper reports some results of experimental study on the effect of 3D-printing on the linear and nonlinear elastic properties of ABS polymer specimens manufactured in the form of thin filaments with 100% filling. The initial and 3D-printed ABD polymer specimens were studied by the static and Thurston–Bragger methods. Linear and nonlinear Young’s moduli and second-order nonlinear acoustic parameters were determined for several loading–unloading cycles of a specimen. It has been shown that the selected 3D-printing mode does not almost change the strength characteristics of ABS polymer, and its plastic characteristics even become slightly better. It has been revealed that mechanical loading has different effects on the nonlinear parameter of the initial and 3D-printed specimens. For the 3D-printed specimen, the nonlinear parameter is observed to decrease with increasing load.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"236 - 241"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Estimating the Coordinates of Mobile Marine Robots Using Vector–Scalar Arrays Permanently Installed in a Waveguide 利用永久安装在波导中的矢量标尺阵列估算移动式海洋机器人的坐标
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771024601602
G. M. Glebova, G. A. Zhbankov, G. N. Kuznetsov
{"title":"Estimating the Coordinates of Mobile Marine Robots Using Vector–Scalar Arrays Permanently Installed in a Waveguide","authors":"G. M. Glebova,&nbsp;G. A. Zhbankov,&nbsp;G. N. Kuznetsov","doi":"10.1134/S1063771024601602","DOIUrl":"10.1134/S1063771024601602","url":null,"abstract":"<p>An experimental verification of the possibility of estimating the coordinates of a mobile marine robot using spatially offset small-sized vector–scalar arrays, a broadband source placed on board the robot, and a remote polyharmonic permanently installed source—a beacon, which is used to eliminate bearing shifts caused by rotating receiving arrays under the action of underwater currents. It is shown that the use of technical means installed in the waveguide makes it possible to solve the triangulation problem and determine the horizontal coordinates of the robot, while taking into account the ray structure provides a depth estimate.</p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"314 - 324"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Effect of a Weakly Divergent Acoustic Beam on the Spatiotemporal Structure of Pulsed Signals in an Underwater Sound Channel 弱发散声束对水下声道中脉冲信号时空结构的影响
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771023600717
Yu. V. Petukhov, E. L. Borodina
{"title":"Effect of a Weakly Divergent Acoustic Beam on the Spatiotemporal Structure of Pulsed Signals in an Underwater Sound Channel","authors":"Yu. V. Petukhov,&nbsp;E. L. Borodina","doi":"10.1134/S1063771023600717","DOIUrl":"10.1134/S1063771023600717","url":null,"abstract":"<div><p>On the example of an underwater sound channel typical of the Philippine Sea [1–3], it was established by numerical simulation using mode theory that during experimental studies of the propagation of explosive signals by R.A. Vadov [1–3], manifestation of a weakly divergent beam in the spatiotemporal structure of the acoustic field was observed for the first time: at certain locations of the corresponding points in the oceanic waveguide, in addition to classical quadruples of pulses, additional acoustic signals with small time delays with respect to them.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"344 - 349"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Variation of Nonlinearity Parameter and Acoustic Attenuation with Temperature in Few Semiconductors 少数半导体中的非线性参数和声衰减随温度的变化
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771023601334
S. H. Bagade, P. A. Saudagar
{"title":"Variation of Nonlinearity Parameter and Acoustic Attenuation with Temperature in Few Semiconductors","authors":"S. H. Bagade,&nbsp;P. A. Saudagar","doi":"10.1134/S1063771023601334","DOIUrl":"10.1134/S1063771023601334","url":null,"abstract":"<p>Acoustic attenuation coefficient per unit frequency square has been calculated for pure semiconductors like silicon and germanium, as well as for mixed semiconductors like gallium arsenide (III–V group) and tin telluride (IV–VI group), for longitudinal waves travelling along the <span>(leftlangle {100} rightrangle )</span> crystallographic axis, within the temperature range 80–300 K. Second-order elastic constants of the materials are used to calculate the average Gruneisen parameter <span>(leftlangle {{{gamma }}_{i}^{j}} rightrangle )</span>, using which the nonlinearity parameter <i>D</i><sub>L</sub> has been calculated for different temperatures. The knowledge of <i>D</i><sub>L</sub> is used for calculation of acoustic attenuation coefficient per unit frequency square due to phonon–phonon interaction <span>({{left[ {{{{alpha }} mathord{left/ {vphantom {{{alpha }} {{{f}^{2}}}}} right. kern-0em} {{{f}^{2}}}}} right]}_{{text{L}}}})</span> and thermoelastic losses <span>({{left[ {{{{alpha }} mathord{left/ {vphantom {{{alpha }} {{{f}^{2}}}}} right. kern-0em} {{{f}^{2}}}}} right]}_{{{text{th}}}}})</span>. Acoustic attenuations are found to be temperature dependent and increases with it. The magnitude of acoustic attenuation per unit frequency square due to phonon–phonon interactions is greater than that due to thermoelastic losses. The magnitude of acoustic attenuation for the investigated semiconductors is in the order Si &lt; Ge &lt; GaAs &lt; SnTe. It is observed that anharmonicity of the solids which give rise to phonon–phonon interaction is the dominant cause of acoustic attenuation of propagating waves. The acoustic attenuation of propagating waves is found to be proportional to the molecular weights of semiconductors<i>.</i></p>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"229 - 235"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Acoustic Diagnostics of Underwater Emissions Propagating in the Form of a Multiphase Jet 以多相喷流形式传播的水下发射物的声学诊断技术
IF 0.9 4区 物理与天体物理
Acoustical Physics Pub Date : 2024-07-15 DOI: 10.1134/S1063771024601481
I. K. Gimaltdinov, M. V. Stolpovsky, E. Y. Kochanova
{"title":"Acoustic Diagnostics of Underwater Emissions Propagating in the Form of a Multiphase Jet","authors":"I. K. Gimaltdinov,&nbsp;M. V. Stolpovsky,&nbsp;E. Y. Kochanova","doi":"10.1134/S1063771024601481","DOIUrl":"10.1134/S1063771024601481","url":null,"abstract":"<div><p>The interaction of a pressure pulse with a gas–liquid zone, which is a section of a flooded multiphase jet consisting of a water–oil mixture and containing a methane bubble core, is numerically investigated. The possibility of determining the degree of expansion of the jet and the volume content of oil and gas in the jet from reflected signals is shown.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"242 - 247"},"PeriodicalIF":0.9,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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