振动条件下生物动力学响应的实验研究

Experimental Study on Biodynamic Response to Vibration in Human and Animals

５６位受试者以坐姿承受Ｘ、Ｙ、Ｚ三个方向、不同振级的振动，以研究人体对振动的动态响应特性。人体振动响应的幅频特性曲线表明，人体是以一个整体进行振动响应的。多数部位有两个共振峰。全部受试者同一部位的传递性曲线是相似的，但具体的频率和幅值存在个体差异。通过研究发现人体的共振频率随着振动强度的增加而降低。但未见过类似报告，因而进一步开展动物实验研究。８只兔、６条狗、４只猴子承受了不同强度、不同方向的振动。结果表明，动物对振动的动态响应特性与人体的响应相似。全部实验动物的共振频率皆随着振动振级的提高而下降。在实验数据的基础上，建立了人体振动响应的数学模型。同时还利用三层人工神经网络方法建立了共振频率与身高、体重和振级之间的非线性映射模型。研究结果对振动人机工程学研究和应用有重要意义。

In order to study the characteristics of human dynamic response to vibration, 56 subjects were exposed to vibration on X, Y and Z axes. It showed that there were two resonance peaks of most local parts of the human body. The curves of transmissibility are essentially the same in all the subjects.It was found that resonance frequencies of the human body decreased with increase of G levels of vibration.These characteristics were also proved in animals. Using three-level artificial neural network, common reflective relation of the resonance frequency with height and weight of the human body and exciting accelaration were obtained.The above findings might be applicable to studies of vibration ergonomics.