Clavicle fractures are common medical emergencies; their prevention through design of protection systems depends upon understanding injury mechanisms. This work analyzes the bending natural frequencies and mode shapes of the human cadaver clavicles in situ. The method applied includes experimental modal analysis (EMA) techniques on cadaver clavicles and correlates results with previous analyses. The clavicle response to shock depends on mechanical energy transmission between load and bone and requires an understanding of modal characteristics of the clavicle as well as the frequency range of the shock. The loads acting upon the clavicle may be represented by hard impacts (i.e. sport-related hits) or loads with short durations which can excite a wide frequency spectrum. Modal analyses of clavicles have been reported in literature, but those studies were performed on the clavicles isolated from the body. As a result, those analyses found mode shapes dependent upon different boundary conditions than those found in nature. In our study, EMA employed triaxial accelerometers and a force hammer, a testing procedure was developed, and data was analyzed. The EMA was performed with the clavicle supported in situ, and results include the coronal and axial plane first bending modes. Modal parameters obtained serve to design shock mitigation systems.

锁骨骨折是常见的医疗急症；通过设计保护系统来预防它们取决于了解伤害机制。这项工作分析了原位人类尸体锁骨的弯曲固有频率和振型。应用的方法包括对尸体锁骨的实验模态分析 (EMA) 技术，并将结果与​​以前的分析相关联。锁骨对冲击的反应取决于负载和骨骼之间的机械能传递，需要了解锁骨的模态特性以及冲击的频率范围。作用在锁骨上的负荷可能表现为剧烈冲击（即与运动相关的撞击）或持续时间短的负荷，这些负荷可以激发很宽的频谱。锁骨的模态分析已在文献中报道，但这些研究是在与身体分离的锁骨上进行的。结果，这些分析发现模式形状取决于与自然界中发现的不同的边界条件。在我们的研究中，EMA 采用了三轴加速度计和力锤，开发了测试程序，并对数据进行了分析。EMA 是在锁骨原位支撑的情况下进行的，结果包括冠状和轴向平面第一弯曲模式。获得的模态参数用于设计减震系统。EMA 是在锁骨原位支撑的情况下进行的，结果包括冠状和轴向平面第一弯曲模式。获得的模态参数用于设计减震系统。EMA 是在锁骨原位支撑的情况下进行的，结果包括冠状和轴向平面第一弯曲模式。获得的模态参数用于设计减震系统。