作为数学物理方法课程的核心内容之一，贝塞尔函数在引力波物理前沿研究中有着广泛的应用. 这里以宇宙弦的引力波辐射功率的计算为例，详细讨论贝塞尔函数的重要性. 同时，简要介绍贝塞尔函数在双星引力波辐射高阶模式和相变引力波中的应用. 该题目可以作为融合本科核心课程教学与本科生科研的教学(教学研一体化)改革实例.

This paper introduces the extensive application of Bessel functions, a core topic in mathematical physics courses, at the forefront of research in gravitational wave physics. We focus on the significance of Bessel functions through a detailed discussion using the example of gravitational wave radiation from cosmic strings.  Additionally, we briefly outline their application in higher-order mode gravitational wave radiation from binary systems and gravitational waves from phase transitions. This study can serve as an example of educational reform integrating undergraduate core curriculum teaching with undergraduate research.