单自由度Maxwell阻尼器减震结构的等效阻尼解析分析

单自由度Maxwell阻尼器减震结构的等效阻尼解析分析李创第;班定维;张翊
【期刊名称】《广西大学学报（自然科学版）》
【年(卷),期】2017(042)004
【摘要】为了提高单自由度Maxwell阻尼器减震结构的等效阻尼和频率的解析分析法的精度,首先基于一般线性粘弹性耗能结构动力响应特性完全由其自振特性确定的性质,以及实际工程中应用的Maxwell流体阻尼器和支撑-粘滞阻尼器复合系统均具有松弛时间较小的特性,重构了结构基本分析方程,然后基于自由振动特性完全相同的等效准则,采用多尺度方法获得了减震结构的一阶等效阻尼和频率的近似解析式,使减震结构可直接应用反应谱法进行抗震设计;并将上述分析法推广到单自由度广义Maxwell阻尼器减震结构.对比分析结果表明,文中方法优于经典的模态应变能法,对于工程常规的单自由度Maxwell阻尼器减震结构,在我国抗震规范要求的参数范围内,其计算误差可控制在3%以内.%order to improve the calculation accuracy of analytical methods for equivalent damping and frequency of the single-degree-of-freedom structure with Maxwell damper,the multiple time scale method was studied.Firstly, the dynamic equation of the above system was reconstructed, which was based on the fact that the dynamic characteristics of general linear viscoelastically-damped structures were fully determined by its free vibration properties, and that the relaxation time constants of Maxwell fluid damper and supplemental brace-viscous damper in engineering were all small.Secondly, by using the multiple time scale method, the first-order approximately equivalent damping and
frequency of the damper were obtained in closed form,which allowed the response spectrum technique to be applied to predict the maximum response of the stly, the method was extended to the analysis of the generalized Maxwell damper structure.By comparing with the exact solutions, the accuracy of the proposed method was varied to be superior.Within the scope of the seismic code of China, the error of the proposed equivalent system for the regular above-mentioned structure in engineering was less than 3%.
【总页数】14页(P1236-1249)
【作者】李创第;班定维;张翊
【作者单位】广西大学土木建筑工程学院,广西南宁530004;广西科技大学土木建筑工程学院,广西柳州545006;广西大学土木建筑工程学院,广西南宁530004;广西大学土木建筑工程学院,广西南宁530004
【正文语种】中文
【中图分类】TU311.3
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2.单自由度广义Maxwell阻尼减震结构的平稳响应分析 [J], 李创第;谢小龙;尉霄腾
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