【摘要】 为分析结构在爆破振动作用下的弹塑性能量反应,首先针对单自由度体系,建立了力学平衡方程;然后利用实测的爆破振动信号,通过数值计算并去噪获取不同频率的加速度时程曲线;最后将不同频率的加速度时程曲线进行人工调整,分析爆破振动3要素对滞回耗能谱的影响规律。研究表明:滞回耗能能综合的反应爆破振动3要素,特别是能够反应结构进入弹塑性阶段能量随爆破振动持续时间的累积效应。因此,可认为滞回耗能是反应爆破振动作用下结构塑性累积损伤的重要参数。更多还原

【Abstract】 To analyze the elastic-plastic energy response of structure under the action of blasting vibration,firstly,mechanical equilibrium equation was established specific to single degree of freedom system;then,using measured blasting vibration signals,acceleration schedule curves of different frequency were obtained by numerical calculation and de-noising;finally,the acceleration schedule curves of different frequency needed some manual adjustment to analyze the influence of blasting vibration 3 elements on hysteretic energy spectrum.The researches show that hysteretic energy can reflect the blasting vibration 3 elements comprehensively,especially when structure enters into elastic-plastic stage,it can reflect the cumulative effect of energy along with the duration of blasting vibration.Therefore,it can be considered that hysteretic energy is an important parameter to reflect the structure plastic accumulated damage under the action of blasting vibration;it has essential meaning in theory and practical value in engineering.更多还原