Whole-body biodynamics and modelling

全身生物动力学和建模

• 批准号: 227096-2010
• 负责人: Boileau, PaulÉmile
• 金额: $ 1.75万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=478393
• 关键词: Whole; body; biodynamics; modelling

The characterization of the biodynamic response of human subjects exposed to whole-body vibration is widely used to enhance our knowledge of the adverse vibration health effects and to assist in the design of vehicle seats. While the biodynamic response of the body has ben most widely characterized under single-axis vibration using the driving-point mechanical impedance, apparent mass and seat-to-head transmissibility responses for subjects seated on a rigid seat, there is a need to better understand how the multi-axes vibration encountered in vehicles is transmitted to different parts of the body to provide an understanding of the injury mechanisms involved. Furthermore, the biodynamic responses need to be defined on typical suspension or visco-elastic seats which are more representative of those used in vehicles. This program of work is aimed at characterizing the biodynamic responses of the human body seated on visco-elastic surfaces and exposed to multiple-axes whole-body vibration representative of those encountered in different types of road, off-road and industrial vehicles. These studies will involve laboratory investigations in which groups of male and female subjects within different mass ranges will be submitted to multiple axes and single-axis vibration using a 6 degree-of-freedom whole-body vibration simulator. The measured responses, including variations in seated postures, will be statistically analyzed to establish reliable target data for the seated human body exposed to various types of vehicle vibration. On the basis of the measured responses, biodynamic models of the seated body will be developed to build occupant-seat models for design and analysis of suspension and visco-elastic seats. Validation of these models will be established by comparing the predicted occupant-seat vibration transmissibility responses with those measured in the laboratory with real seats and subjects under various vibration and postural conditions. This program of work should generate new understanding on the feasibility of applying laboratory-based models to reliably represent the seat-occupant responses under typical vehicle vibration environments.

人体暴露在全身振动下的生物动力学反应的特征被广泛用于提高我们对不利振动对健康影响的认识，并协助车辆座椅的设计。虽然人体的生物动力学响应在单轴振动下得到了最广泛的表征，使用驱动点机械阻抗、表观质量和刚性座椅上受试者的座椅到头部的传递性响应，但有必要更好地了解车辆中遇到的多轴振动如何传递到身体的不同部位，以提供对所涉及的损伤机制的理解。此外，需要在典型的悬架或粘弹性座椅上定义生物动力学响应，这些座椅更具有车辆使用的代表性。该项目旨在描述人体在粘弹性表面上的生物动力学响应，并暴露于不同类型的道路、越野和工业车辆中所遇到的多轴全身振动。这些研究将包括实验室调查，在不同质量范围内的男性和女性受试者组将使用6自由度全身振动模拟器进行多轴和单轴振动。测量到的反应，包括坐姿的变化，将被统计分析，以建立可靠的目标数据，为坐着的人体暴露于各种类型的车辆振动。在测量响应的基础上，将建立座舱生物动力学模型，建立乘员座椅模型，用于悬架和粘弹性座椅的设计和分析。通过将预测的乘员座椅振动传递率响应与实验室测量的真实座椅和受试者在各种振动和姿势条件下的振动传递率响应进行比较，建立这些模型的有效性。这一工作计划将对应用基于实验室的模型可靠地表示典型车辆振动环境下座椅-乘员响应的可行性产生新的认识。