Chashechkin Yu.D. «Ligaments, waves and vortices in fluid flows» 9-я Международная конференция – школа молодых ученых «Волны и вихри в сложных средах». Москва, 05–07 декабря 2018 г., с. 5-8 (2018)

Wang Y., Chen C. «Traveling Surface Acoustic Wave Induced Removal of NSB Proteins from the Acoustic Biosensor» Acoustical Physics, 70, № 1, с. 90-104 (2024)

One challenge of current biosensors is to remove non-specifically bound (NSB). Surface acoustic wave (SAW) technology, because of its non-contact and non-marker characteristics, becomes one of the hot research fields and shows great prospects. In this paper, SAW is used to remove NSB. Firstly, the effect of the cut of the piezoelectric material on the removal force is determined based on the dispersion equation of the acoustic wave and the properties of the piezoelectric material. Secondly, the effects of channel height, excitation voltage and fluid medium temperature on the removal process are verified through theoretical calculations. The results show that the SAW force, lift force and drag force induce by the SAW can effectively remove the NSB, among which, SAW force mainly removes the nonspecifically bound from sensor surface, while the lift force and drag force mainly prevent the re-deposition of the removed NSB. Finally, the optimal region where NSB can be removed effectively by SAW is determined by comparing the SAW force and van der Waals force. When the sensing region is located in the optimal region, not only can the NSB be effectively removed, but also the performance of the sensor is guaranteed.

Bai Yunshan, Liu Yuanxue, Gao Guangjian, Cui Dandan, Chen Han «Estimating the Azimuth of Acoustic Emission Source in Concrete Plate-Like Structures using a Non-Contact Sensor Unit» Acoustical Physics, 70, № 1, с. 130-142 (2024)

Location of damage sources is an important aspect of structural health monitoring research. Acoustic emission (AE) technology is broadly concerned due to its potential advantages in damage monitoring and source localization. However, the traditional positioning method is based on the arrival of P wave, and the non-uniformity of concrete materials is not considered, resulting in poor accuracy at large distances. This paper describes a non-contact AE localization method using leaky Rayleigh waves via a new air-coupled MEMS microphones array unit. Compared with traditional contact detection, this method is convenient for rapid setup and monitoring in a wider range. The feasibility of the non-contact AE localization method was verified by numerical simulation and experiments. Azimuth (direction of arrival) of AE source is a key source parameter for damage location. The research shows that this method can determine the azimuth of AE source at different positions, the results are close to the actual coordinates. Non-contact monitoring method proposed in this paper is the basis for further research on the failure prediction of concrete plate-like structures such as tunnel lining and bridge deck.

Chirkunov Yu.A. «Self-focusing of the ultrasonic beams described by a three-dimensional model of non-linear hydroacoustics Khokhlov–Zabolotskaya–Kuznetsov in a cubic nonlinear medium» Актуальные проблемы прикладной математики и механики. Тезисы докладов X Всероссийской конференции с международным участием, посвященной памяти академика А.Ф. Сидорова и 100-летию Уральского федерального университета. Абрау-Дюрсо, 01–06 сентября 2020 г., с. 3-4 (2020)

Chirkunov Yu.A., Skolubovich Yu.L. «Generalization the one-dimensional Leibenzon model of the motion of a liquid or gas in a porous medium in the presence of an unsteady singular source» Актуальные проблемы прикладной математики и механики. Тезисы докладов X Всероссийской конференции с международным участием, посвященной памяти академика А.Ф. Сидорова и 100-летию Уральского федерального университета. Абрау-Дюрсо, 01–06 сентября 2020 г., с. 4-5 (2020)

Bai Yunshan, Liu Yuanxue, Gao Guangjian, Cui Dandan, Chen Han «Estimating the Azimuth of Acoustic Emission Source in Concrete Plate-Like Structures using a Non-Contact Sensor Unit» Acoustical Physics, 70, № 1, с. 130-142 (2024)

Location of damage sources is an important aspect of structural health monitoring research. Acoustic emission (AE) technology is broadly concerned due to its potential advantages in damage monitoring and source localization. However, the traditional positioning method is based on the arrival of P wave, and the non-uniformity of concrete materials is not considered, resulting in poor accuracy at large distances. This paper describes a non-contact AE localization method using leaky Rayleigh waves via a new air-coupled MEMS microphones array unit. Compared with traditional contact detection, this method is convenient for rapid setup and monitoring in a wider range. The feasibility of the non-contact AE localization method was verified by numerical simulation and experiments. Azimuth (direction of arrival) of AE source is a key source parameter for damage location. The research shows that this method can determine the azimuth of AE source at different positions, the results are close to the actual coordinates. Non-contact monitoring method proposed in this paper is the basis for further research on the failure prediction of concrete plate-like structures such as tunnel lining and bridge deck.