Xu Y., Liu C., Cao Q., Li Y. «Real-Time Detection and Synergistic Effect of Acoustic Cavitation Excited by Pulse HIFU Based on Self-Sensing Ultrasound» Акустический журнал, 70, № 3, с. pp476-486 (2024)

High-intensity focused ultrasound (HIFU) is widely used in the treatment of benign and malignant tumors due to its advantages of noninvasiveness and high therapeutic efficiency. However, how to improve the efficiency of heat deposition in a short period of time is a key problem during HIFU thermal ablation. The acoustic cavitation excited by pulse HIFU has been proven to achieve HIFU efficiency enhancement. However, the real-time monitoring of acoustic cavitation is still an issue. In this study, a real-time detection method of acoustic cavitation is established based on self-sensing ultrasound, and the synergistic effect of acoustic cavitation excited by pulse HIFU is researched. The influences of the output power, pulse duration, irradiation depth on cavitation duration are respectively discussed by using the established cavitation detection method compared passive cavitation detection (PCD). The relationship between cavitation intensity and synergistic effect is discussed. The results have shown that the cavitation detection can real-time measure cavitation duration compared with PCD. In addition, during the cavitation detection of pulse HIFU, the synergistic effect of acoustic cavitation is obvious in HIFU ablation.

Вечёра М.С., Коновалов С.И., Коновалов Р.С., Ch I.B., Цаплев В.М. «К вопросу о рациональном выборе формы демпфера ультразвукового пьезопреобразователя» Дефектоскопия, № 5, с. 3-15 (2024)

Представлены результаты исследования влияния геометрической формы демпфера на эффективность его работы и эффективность работы системы излучения-приема «в целом». Рассмотрена одна из возможных форм демпфера, когда он выполняется в виде усеченного конуса, образующая которого имеет угол наклона по отношению к плоскости пьезопластины. Предложен критерий оценки эффективности работы демпфера. В работе приведены результаты расчетнотеоретического (методом конечных элементов) и экспериментального исследований влияния угла наклона образующей демпфера на сигнал, отраженный от его тыльной части. Определен угол наклона образующей, при котором достигается минимум паразитных сигналов. Осуществлено исследование системы излучения-приема при нагрузке на водную среду. Отмечено удовлетворительное совпадение результатов теоретических и экспериментальных исследований.

Zhu R., Hu H., Wang R., Chen H. «Reverse Design of Absorption Performance for Typical Underwater Acoustic Coatings Based on Neural Network» Акустический журнал, 70, № 4, с. pp745-758 (2024)

This paper presents a method for rapidly reverse designing the absorption performance of acoustic coatings, utilizing the principles of a concatenated deep neural network. It enables the swift acquisition of effective input parameters. By cascading a reverse neural network with pre-trained forward neural networks, a concatenated neural network is obtained. This network maps the absorption spectrum response to structural and material parameters, thereby resolving the nonuniqueness issue in traditional reverse design. The paper describes the detailed process of reverse designing the absorption performance of acoustic coatings and validates the correctness of the reverse design using finite element methods. A comparative analysis investigates the impact of different loss functions on result accuracy. The findings demonstrate that the proposed modified loss function algorithm significantly enhances precision compared to traditional direct reverse design. This advancement allows for the customization of acoustic coatings with specific acoustic properties, providing technical groundwork for vibration and noise reduction in underwater vehicles.