论文部分内容阅读
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。
Fifty-six subjects in a sitting position were subjected to vibration in different directions of X, Y, and Z directions to study the dynamic response of the human body to vibration. The amplitude-frequency characteristic curve of the human body’s vibration response shows that the human body responds as a whole with a vibrational response. Most parts have two formant. The transmissibility curve of the same part of all the subjects is similar, but there are individual differences in the specific frequencies and amplitudes. Through the study found that the body’s resonant frequency decreases with the increase of vibration intensity. But have not seen a similar report, thus further animal experiments. 8 rabbits, 6 dogs, 4 monkeys under different intensity, different directions of vibration. The results show that the animal’s dynamic response to vibration is similar to that of the human body. The resonance frequencies of all experimental animals decreased with the increase of vibrational vibration level. Based on the experimental data, a mathematical model of human body vibration response is established. At the same time, a nonlinear mapping model of resonance frequency, height, weight and vibration level was also established by using three-layer artificial neural network. The research results are of great significance to the research and application of vibration ergonomics.