Pub Date : 2022-12-22DOI: 10.1142/s2591728523500020
Caglar Gurbuz, S. Marburg
{"title":"Efficient analysis of energy-based surface contributions for an entire acoustic cavity","authors":"Caglar Gurbuz, S. Marburg","doi":"10.1142/s2591728523500020","DOIUrl":"https://doi.org/10.1142/s2591728523500020","url":null,"abstract":"","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"38 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81091403","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}
Pub Date : 2022-12-01DOI: 10.1142/s2591728521500225
Boao Jin, Yan Gao, Zhongkun Jin
The time-harmonic asymptotic solutions due to the surface horizontal vibration sources provide the theoretical basis in the applications of buried object detection. In the integral transformation method, the Rayleigh secular function appears in the denominator of the integrand of the inverse transformation. This leads to the multi-leaf characteristics of the integrand and the asymptotic solution is affected by the Rayleigh poles, resulting in a mismatch between the asymptotic time-harmonic solution and the finite element results. In this paper, an integral expression for the time-harmonic solution of the surface horizontal vibration source is derived using the integral transformation method. The asymptotic results using the steepest descent method are decomposed into the analytical component, the modified component of the poles and the residual component of the poles. Expressions for each component are given, with particular emphasis on the effect of the Rayleigh secular function on the asymptotic solution. It is found that for the multi-leaf problem, the asymptotic expressions related to shear waves should use the results of the [Formula: see text] leaf, while the asymptotic expressions related to compressional waves should use the results of the [Formula: see text] leaf when [Formula: see text]. Comparison of the numerical and semi-analytical solutions is made to verify the expressions for the analytical components, along with the selection of the Riemann surface.
{"title":"Effects of the Rayleigh Secular Function on Time-Harmonic Asymptotic Solutions Due to Horizontal Vibration Sources","authors":"Boao Jin, Yan Gao, Zhongkun Jin","doi":"10.1142/s2591728521500225","DOIUrl":"https://doi.org/10.1142/s2591728521500225","url":null,"abstract":"The time-harmonic asymptotic solutions due to the surface horizontal vibration sources provide the theoretical basis in the applications of buried object detection. In the integral transformation method, the Rayleigh secular function appears in the denominator of the integrand of the inverse transformation. This leads to the multi-leaf characteristics of the integrand and the asymptotic solution is affected by the Rayleigh poles, resulting in a mismatch between the asymptotic time-harmonic solution and the finite element results. In this paper, an integral expression for the time-harmonic solution of the surface horizontal vibration source is derived using the integral transformation method. The asymptotic results using the steepest descent method are decomposed into the analytical component, the modified component of the poles and the residual component of the poles. Expressions for each component are given, with particular emphasis on the effect of the Rayleigh secular function on the asymptotic solution. It is found that for the multi-leaf problem, the asymptotic expressions related to shear waves should use the results of the [Formula: see text] leaf, while the asymptotic expressions related to compressional waves should use the results of the [Formula: see text] leaf when [Formula: see text]. Comparison of the numerical and semi-analytical solutions is made to verify the expressions for the analytical components, along with the selection of the Riemann surface.","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"50 6 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80211067","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}
Pub Date : 2022-12-01DOI: 10.1142/s2591728521500195
A. Maksimov
This paper fills the gap in the study of Rayleigh scattering near an interface. The structure of the near-field of the half-space Green’s function is analytically described. Explicit dependencies on range, distance to the boundary, and physical parameters of contacting media are obtained. These results are of applied value for modern ultrasonic cleaning techniques because they allow one to describe the action of the Bjerknes force on particles located near an interface.
{"title":"Near Field of the Half-Space Green’s Function","authors":"A. Maksimov","doi":"10.1142/s2591728521500195","DOIUrl":"https://doi.org/10.1142/s2591728521500195","url":null,"abstract":"This paper fills the gap in the study of Rayleigh scattering near an interface. The structure of the near-field of the half-space Green’s function is analytically described. Explicit dependencies on range, distance to the boundary, and physical parameters of contacting media are obtained. These results are of applied value for modern ultrasonic cleaning techniques because they allow one to describe the action of the Bjerknes force on particles located near an interface.","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"686 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74740402","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}
Pub Date : 2022-12-01DOI: 10.1142/s2591728521500298
Zhenan Song, Daoqing Chang, Hongling Sun
The influences of the length and width of small-aperture cavity are calculated with the [Formula: see text]–[Formula: see text] model and large eddy simulation on the frequencies of resonant peaks of flow-induced cavity noise at different flow velocities in water. The calculated results show that the semi-empirical Rossiter formulas are only suitable for large-aperture models. For small-aperture cavity models, the resonance peak frequencies predicted by these formulas deviate greatly from the corresponding numerical results. In addition, as the length of cavity opening decreases, the minimum flow velocity gradually increases, at which a resonant peak just appears. Finally, the range of this minimum flow velocity is given for the different opening lengths.
{"title":"Study of Resonant Peak Characteristics of Flow-Induced Noise in Small-Aperture Cavity","authors":"Zhenan Song, Daoqing Chang, Hongling Sun","doi":"10.1142/s2591728521500298","DOIUrl":"https://doi.org/10.1142/s2591728521500298","url":null,"abstract":"The influences of the length and width of small-aperture cavity are calculated with the [Formula: see text]–[Formula: see text] model and large eddy simulation on the frequencies of resonant peaks of flow-induced cavity noise at different flow velocities in water. The calculated results show that the semi-empirical Rossiter formulas are only suitable for large-aperture models. For small-aperture cavity models, the resonance peak frequencies predicted by these formulas deviate greatly from the corresponding numerical results. In addition, as the length of cavity opening decreases, the minimum flow velocity gradually increases, at which a resonant peak just appears. Finally, the range of this minimum flow velocity is given for the different opening lengths.","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"7 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72970636","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}
Pub Date : 2022-11-30DOI: 10.1142/s2591728522500153
Michael C. Mortenson, T. Neilsen, M. Transtrum, D. Knobles
{"title":"Accurate broadband gradient estimates enable local sensitivity analysis of ocean acoustic models","authors":"Michael C. Mortenson, T. Neilsen, M. Transtrum, D. Knobles","doi":"10.1142/s2591728522500153","DOIUrl":"https://doi.org/10.1142/s2591728522500153","url":null,"abstract":"","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"11 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87967611","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}
Pub Date : 2022-11-16DOI: 10.1142/s2591728522500141
Muhammad Ali Bablu, O. Akinmolayan, James M. Manimala
{"title":"Sound Transmission Loss of Meta-Acoustic Barriers with Anomalous Effective-Mass","authors":"Muhammad Ali Bablu, O. Akinmolayan, James M. Manimala","doi":"10.1142/s2591728522500141","DOIUrl":"https://doi.org/10.1142/s2591728522500141","url":null,"abstract":"","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"46 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86754818","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}
Pub Date : 2022-09-30DOI: 10.1142/s2591728522500086
Yazhong Lu, Lingguang Chen, Pan Zhou, Sean F. Wu
This paper presents the experimental validations of reconstructing the characteristics of the excitation forces that act inside a vibrating structure, which includes the location, type, amplitude, and spectrum, based on a single set of measurements of the normal surface velocity on the exterior surface by using the modified Helmholtz Equation Least Squares (HELS) method, as if one could see through this solid structure. Phase I of this paper shows the reconstruction of the vibroacoustic responses in the exterior region of the structure, including the field acoustic pressure, the surface acoustic pressure, the normal surface velocity or Operational Deflection Shape (ODS), the normal component of the time-averaged acoustic intensity, and the time-averaged acoustic power. Phase II of this paper illustrates the reconstruction of the excitation forces with the fluid-loading effects taken into consideration, based on the vibroacoustic responses reconstructed in the exterior region. The significance of the study, namely, the interrelationships among the excitation force, structural vibration, and acoustic radiation is discussed. The knowledge thus acquired may be important for engineers to analyze various complex noise and vibration issues in practice and to come up with the most cost-effective noise and vibration mitigation strategies.
{"title":"Experimental Validations of Reconstructed Excitation Forces Acting Inside a Solid Enclosure. Part I: Exterior Region","authors":"Yazhong Lu, Lingguang Chen, Pan Zhou, Sean F. Wu","doi":"10.1142/s2591728522500086","DOIUrl":"https://doi.org/10.1142/s2591728522500086","url":null,"abstract":"<p>This paper presents the experimental validations of reconstructing the characteristics of the excitation forces that act inside a vibrating structure, which includes the location, type, amplitude, and spectrum, based on a single set of measurements of the normal surface velocity on the exterior surface by using the modified Helmholtz Equation Least Squares (HELS) method, as if one could see through this solid structure. Phase I of this paper shows the reconstruction of the vibroacoustic responses in the exterior region of the structure, including the field acoustic pressure, the surface acoustic pressure, the normal surface velocity or Operational Deflection Shape (ODS), the normal component of the time-averaged acoustic intensity, and the time-averaged acoustic power. Phase II of this paper illustrates the reconstruction of the excitation forces with the fluid-loading effects taken into consideration, based on the vibroacoustic responses reconstructed in the exterior region. The significance of the study, namely, the interrelationships among the excitation force, structural vibration, and acoustic radiation is discussed. The knowledge thus acquired may be important for engineers to analyze various complex noise and vibration issues in practice and to come up with the most cost-effective noise and vibration mitigation strategies.</p>","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"47 18","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138519852","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}
Pub Date : 2022-09-21DOI: 10.1142/s259172852250013x
Shotaro Hisano, Satoshi Ishikawa, H. Iwamoto
{"title":"Coupled analysis of acoustic space and thin-plate vibrations by a lumped-mass model using Raviart–Thomas elements","authors":"Shotaro Hisano, Satoshi Ishikawa, H. Iwamoto","doi":"10.1142/s259172852250013x","DOIUrl":"https://doi.org/10.1142/s259172852250013x","url":null,"abstract":"","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"90 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78039777","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}
Pub Date : 2022-09-12DOI: 10.1142/s2591728522400035
R. Piscoya, M. Ochmann
{"title":"Sound radiation of a line source with general time dependence moving above an interface between two homogeneous semi-infinite fluid media","authors":"R. Piscoya, M. Ochmann","doi":"10.1142/s2591728522400035","DOIUrl":"https://doi.org/10.1142/s2591728522400035","url":null,"abstract":"","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"18 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81965783","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}
Pub Date : 2022-09-12DOI: 10.1142/s2591728522400023
Simone Preuss, Caglar Gurbuz, C. Jelich, S. K. Baydoun, S. Marburg
{"title":"Recent advances in acoustic boundary element methods","authors":"Simone Preuss, Caglar Gurbuz, C. Jelich, S. K. Baydoun, S. Marburg","doi":"10.1142/s2591728522400023","DOIUrl":"https://doi.org/10.1142/s2591728522400023","url":null,"abstract":"","PeriodicalId":55976,"journal":{"name":"Journal of Theoretical and Computational Acoustics","volume":"21 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84421156","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}
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