传递率(结构动力学)
传递函数
振动
频率响应
全身振动
功能(生物学)
结构工程
实验数据
均方根
数学模型
数学
工程类
控制理论(社会学)
计算机科学
统计
隔振
声学
物理
电气工程
人工智能
生物
控制(管理)
进化生物学
作者
Zengkang Gan,Andrew Hillis,J Darling
出处
期刊:Journal of Vibration Engineering
日期:2015-07-01
卷期号:3 (3): 301-314
被引量:2
摘要
In this article, the biodynamic responses of seated human subjects (SHS) exposed to whole-body vibration (WBV) in both vertical and fore-and-aft directions are modelled. The mathematical model can be used to obtain a better insight into the mechanisms and biodynamic behaviour of the SHS system. The main limitation of some previous SHS models is that they were derived to satisfy a single biodynamic response function. Such an approach may provide a reasonable fit with the function data being considered but uncertain matches with the others. The model presented in this study is based on all three types of biodynamic response functions: seat-to-head transmissibility (STHT), driving-point mechanical impedance (DPMI) and apparent mass (APM). The objective of this work is to match all three functions and to represent the biodynamic behaviour of SHS in a more comprehensive way. Three sets of synthesized experimental data from published literature are selected as the target values for each of the three transfer functions. A curve fitting method is used in the parameter identification process which involves the solution of a multivariable optimization function comprising the root mean square errors between the computed values using the model and those target values measured experimentally. Finally, a numerical simulation of the frequency response of the model in terms of all three biodynamic functions has been carried out. The results show that an improved fit is achieved comparing with the existing models.
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