Gupta T C
Department of Mechanical Engineering, Malaviya National Institute of Technology, Jaipur 302 017, India.
J Biomech Eng. 2007 Aug;129(4):566-74. doi: 10.1115/1.2720917.
A 15 degrees of freedom lumped parameter vibratory model of human body is developed, for vertical mode vibrations, using anthropometric data of the 50th percentile US male. The mass and stiffness of various segments are determined from the elastic modulii of bones and tissues and from the anthropometric data available, assuming the shape of all the segments is ellipsoidal. The damping ratio of each segment is estimated on the basis of the physical structure of the body in a particular posture. Damping constants of various segments are calculated from these damping ratios. The human body is modeled as a linear spring-mass-damper system. The optimal values of the damping ratios of the body segments are estimated, for the 15 degrees of freedom model of the 50th percentile US male, by comparing the response of the model with the experimental response. Formulating a similar vibratory model of the 50th percentile Indian male and comparing the frequency response of the model with the experimental response of the same group of subjects validate the modeling procedure. A range of damping ratios has been considered to develop a vibratory model, which can predict the vertical harmonic response of the human body.
利用美国第50百分位男性的人体测量数据，建立了一个15自由度的人体集中参数振动模型，用于垂直模式振动。假设所有节段的形状均为椭圆形，根据骨骼和组织的弹性模量以及现有的人体测量数据确定各个节段的质量和刚度。根据人体在特定姿势下的物理结构估算每个节段的阻尼比。从这些阻尼比计算出各个节段的阻尼常数。人体被建模为一个线性弹簧-质量-阻尼系统。通过将模型的响应与实验响应进行比较，估算了美国第50百分位男性15自由度模型中人体节段阻尼比的最佳值。建立第50百分位印度男性的类似振动模型，并将该模型的频率响应与同一组受试者的实验响应进行比较，验证了建模过程。考虑了一系列阻尼比来建立一个振动模型，该模型可以预测人体的垂直谐波响应。
