Control of Occupant-Induced Floor Motion

控制乘员引起的地板运动

• 批准号: 9201944
• 负责人: Thomas Murray
• 金额: $ 17万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1999-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9201944&HistoricalAwards=false
• 关键词: Control; Occupant; Induced; Floor; Motion

Modern construction materials often result in lightweight floor systems susceptible to transient motion imparted by the input forcing function of human locomotion. Technologies intended to control this phenomena must quantify the forcing function and efficient vibration damping methods. The research will quantify the input forcing function of locomotion as a truncated Fourier Series whose coefficients are related to human physical characteristics. Extrapolation using ergonomic indices will then create a statistically based description of population locomotive trends suitable for rational structural design recommendations. The second phase of research will investigate the properties of the human body which make it an efficient damper. Experimental data will be collected from floors using humans as passive or active second mass dampers. Existing mathematical simulations will be used to analytically explain the body's damping potential. Finally, a mechanical device will be developed which emulates human body properties to control unwanted floor motion through artificially increased damping. The research will permit lightweight floor systems to operate at their true design potential, unhampered by vibration serviceability considerations. It will also ascertain analytical methods of design based on input forcing functions which are in turn based on ergonomic population means.

现代建筑材料往往导致轻质地板系统容易受到瞬态运动的输入强迫功能的影响。控制这种现象的技术必须量化强迫函数和有效的减振方法。该研究将运动的输入强迫函数量化为截断的傅立叶级数，其系数与人体的物理特征有关。使用人体工程学指数的外推将创建一个基于统计的人口运动趋势描述，适合合理的结构设计建议。第二阶段的研究将调查人体的特性，使其成为一个有效的阻尼器。实验数据将从地板上收集，使用人类作为被动或主动第二质量阻尼器。现有的数学模拟将用于解析解释机体的阻尼势。最后，将开发一种模拟人体特性的机械装置，通过人为增加阻尼来控制不必要的地板运动。该研究将允许轻型地板系统在其真正的设计潜力下运行，不受振动可维护性考虑的阻碍。它还将确定基于输入强迫函数的设计分析方法，而输入强迫函数又基于人体工程学的人口方法。