不同方向随机振动下人体动态响应特性的研究

Dynamic Response of Human Body Under Random Vibration in Different Directions

53位受试者以坐姿承受了X、Y、Z方向的随机振动。测量了头、肩、胸、腹、髂部的传递函数以研究背带束缚、改变振动G值对人体动态响应的影响。结果表明,不同人体对同一方向振动的频响曲线相似。在增加振动幅值时人体共振频率下降,表现出非线性特征。Y向振动时观察到100Hz左右人体髂部有共振。这些发现有继续深入研究的价值。

Fifty—three subjects were exposed to random vibration in X,Y,Z directions in sitting position. Human dynamic responses and the effects of restraint belts and various magnitudes of vibrations were investigated. The accelerations at head,shoulder, chest, abdomin and iliac ridge of each subject were measured. Results showed that the response curves of all of the subjects in the same direction were substantially the same. The resonance frequancies decreased with increase of G levels of vibration. It showed that the nonlinear reaction of the human body was obvious. A main resonance at lilac ridge under vibrations about 100 Hz in the Y axis has been observed.