频率在创伤性颅脑损伤(traumatic brain injury, TBI)的生物力学响应中扮演着重要角色,冲击载荷可因共振行为而放大脑部局部变形,加剧神经功能障碍。 本文总结了颅脑损伤频响特性的主要研究方法和发展进程,重点探讨不同数学方法在颅脑损伤频响特性中的应用,以及颅脑损伤频响特性的研究现状,并进一步提出深化颅脑损伤频响特性研究的建议。 结果表明,有限元法、降阶模型法和流固耦合法在颅脑损伤频响特性研究中均具可行性,但现有研究对颅脑固有频率尚未达成有效共识,且未将颅脑损伤的频响特性与评价准则进行结合,故基于频响特性完善颅脑损伤力学评价仍是研究的重点。

Frequency plays an important role in biomechanical responses of traumatic brain injury (TBI). Impact loading can amplify brain deformation and aggravate neurological dysfunction due to resonance behavior. This paper summarized the main research methods for frequency response characteristics of brain injury. Specifically, different mathematical methods for the study of frequency response characteristics of brain injury, as well as current understanding on frequency response characteristics were investigated. Then some suggestions for further researches on frequency response characteristics of brain injury were put forward. The results show that finite element method, reduced order model and fluid-solid coupling model are feasible in the study of frequency response characteristics of brain injury. However, there is still a lack of unified understanding about the natural frequency of brain injury, and frequency response characteristics have not been applied in brain injury criteria. Therefore, improving mechanical evaluation of brain injury based on frequency response characteristics is still the research focus.

国家自然科学基金项目(32171305),重庆市自然科学基金项目(cstc2021jcyj-msxmX0110)