物理与工程

超声波因其无创、无辐射、实时、成本相对较低且操作简便等优点,现已成为现代临床医学中不可或缺的工具,从常规健康体检到复杂疾病的诊断和治疗,都发挥着至关重要的作用。在超声声速测量及应用实验中,由于超声波传输,以及其与介质作用过程的不可视性,以致实验教学效果欠佳,学生难以建立直观的物理图像和理解抽象概念。本文针对实验教学中存在的这些难点,借助_Comsol软件对实验内容开展了模拟研究。结果表明,模拟仿真结果与实验结果具有良好的吻合度,且通过可视化的声压分布图,清晰再现了超声波在不同介质中的传播过程及界面作用机制,这不仅有助于提升学生对实验过程与原理的理解深度和应用能力,还能有效激发学生的实验探究兴趣,也为模拟仿真和实验教学的有机结合提供了有益的参考。

Ultrasound has become an indispensable tool in modern clinical medicine because of its non-invasive nature, absence of ionizing radiation, real-time capability, relatively low cost, and ease of operation. It plays an important role in applications ranging from routine health examinations to the diagnosis and treatment of complex diseases. In experiments on ultrasonic sound-speed measurement and its applications, the propagation of ultrasonic waves and their interactions with media are not directly observable, which limits teaching effectiveness and makes it difficult for students to establish an intuitive physical picture and understand abstract concepts. To address these difficulties, this study uses COMSOL Multiphysics to simulate the experimental processes. The results show good agreement between the simulated and experimental results. Moreover, the visualized sound-pressure distributions clearly reproduce the propagation of ultrasonic waves in different media and their interactions at interfaces. These simulations help students deepen their understanding of the experimental processes and principles, improve their ability to apply relevant knowledge, stimulate their interest in experimental exploration, and provide a useful reference for integrating numerical simulation with experimental teaching.