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为研究人体的冲击动态响应特性,6位受试者以坐姿承受垂直位冲击实验。冲击加速度为3G、5G、10G左右。11只猴各承受了1~50G连续冲击。测试了受试对象多个部位的响应。人及猴响应的加速度峰值与座椅加速度峰值基本上呈正相关关系。由于不同部位主共振峰一致,表明人体是以整体对冲击响应的,冲击G值的大小影响人体频响特性。随着冲击G值的增加,人体的共振频率左移,第二峰的峰值随着增高,10G时基本上融合为一个共振峰,致使主共振频率的峰值右移,显示出非线性。该规律与作者的振动研究结果一致。结果提示对于非线性系统可分段线性化逼近,可分别用不同的单自由度线性模型估计人体的动态响应。文中还讨论了冲击动态响应研究的方法学问题。
To study the impact dynamic response of the human body, six subjects were subjected to a vertical impact test in sitting position. Impact acceleration is 3G, 5G, 10G or so. 11 monkeys each withstand 1 ~ 50G continuous impact. Test the response of multiple parts of the test subjects. The acceleration peak of human and monkey response is basically positively correlated with the peak acceleration of seat. As the main resonance peak of different parts of the same, indicating that the body is the overall impact on the impact of impact G value of the size of the body’s frequency response. With the increase of the impact G value, the resonance frequency of the human body shifts to the left, the peak value of the second peak increases with the increase of the G value, and basically merges into a formant at 10 G, causing the peak of the main resonance frequency to shift to the right and shows nonlinearity. The law consistent with the author’s vibration study. The results suggest that the linear response of the human body can be estimated by different linear models of single degree of freedom for the linear approximation of the nonlinear system. The paper also discusses the methodology of impact dynamic response research.