【摘要】 针对颗粒阻尼技术在机械、航天与土木工程领域减振控制使用环境的差异性,对颗粒阻尼技术在土木工程领域等低频、低幅振动条件下颗粒的减振控制机理进行理论分析,指出堆积状态是颗粒阻尼在土木工程领域应用的主要影响因素之一;推导出不同堆积状态下颗粒的起振条件;并以Hertz接触理论和Coulomb摩擦定律为基础,通过MATLAB编程建立颗粒-单自由度结构振动系统,对颗粒起振条件及起振前后颗粒的减振控制效果进行分析。更多还原

【Abstract】 This paper is focusing on the difference between the circumstances of the particle damper’s application in mechanical,astronautics and civil engineering seismic controls. A theoretical analysis was conducted aiming at the seismic control of the particle dampers with low frequency and amplitude. The analysis indicated that the accumulation was one of the key factors to the application of the particle dampers in civil engineering. Thus the starting conditions for the particle oscillation under different accumulating states were derived. Based on the Hertz contact theory and the Coulomb law of friction,a particle-SDOF oscillating system was established with MATLAB,and the starting conditions for the particle oscillation and the damping performance were also analyzed.更多还原