Development of a Synthetic Vibration Model for Human-Investigation into the relations between the physical, psychological and physiological reactions of humans exposed to vibration

研究人体在外界振动作用下的生理、心理和生理反应之间的关系，建立人体综合振动模型；模型不仅要再现身体行为，而且要再现其心理和生理行为。采用了拉格朗日方程、有限元法等形式的数值模型。实验是在人体暴露于以任意频率垂直振动的外部振动的条件下进行的。结果，很明显，在2至11赫兹的频率范围内，有共振点显示出头部，胸部和腹部的显著晃动。进一步，我们建议用多元回归分析来表达这些关系。在此基础上，建立了一个简单的人坐车振动模型，模拟了人坐车时的身体反应，并对人坐车时的心理和生理反应进行了预测。最后，展望未来，我们提到了利用有限元方法将振动模型扩展为更普遍适用的振动模型的可能性，以期将振动模型应用于残疾人。此外，通过人体振动数值模型对人乘坐汽车的振动特性进行实验和数值研究，探讨了汽车工业、火车制造工业和工业设计领域的可能性，特别是在舒适性领域。

We aimed to investigate the relations between the physical, psychological and physiological reactions of the human body exposed to external vibrations and to construct a synthetic vibration model of the human body ; the model should reproduce not only the physical behavior but also its psychological and physiological behavior. Numerical models formalized according to Lagrange's equation, the finite element method, etc. were employed. The experiment was implemented under condition in which the human is exposed to external vibration which perpendicularly vibrates at any frequencies. As a result, it was clear that there are resonance points showing remarkable shaking of the head, the chest and the abdomen in the frequency range 2 to 11 Hz. Further, it was suggested that the relations may be expressed in terms of multiple regression analysis. Moreover, a simple vibration model of a person riding in an automobile was numerically constructed to reproduce the physical reactions of the human, and the psychological and physiological reactions were predicted. Finally, looking to the future view, we referred to the possibility of expanding the vibration model into a more generally applicable vibration model using the finite element method with a view to applying the vibration model to handicapped people.Furthermore, a possibility for the automotive industry, train-building industry and the field of industrial design at large, specifically in the area of comfort, was discussed through experimental and numerical investigation into the vibration characteristics of people riding in automobiles with a human vibration numerical model.