结构动力分析阻尼模型研究

Studies on the damping models for structural dynamic time history analysis

提出了结构动力时程分析修正的Ｒａｙｌｅｉｇｈ阻尼模型和一个基于单元特性的阻尼参数方法，可用于合理确定复杂阻尼结构的阻尼参数。工程应用实例表明，阻尼参数的计算对时程响应计算结果的影响是十分明显的，必须在分析结构体系振动特性的基础上慎重确定阻尼参数，以避免人为放大或滤掉主要振型，造成虚假的结论。

A revised Rayleigh damping model and a element characteristic based method, which are used in structural dynamic time history analysis, are proposed to reasonably decide the damping coefficients of complex structures. Numerical investigations are made as also. It is found that the damping parameters may obviously affect the results of dynamic time history calculations. The damping parameters must be decided after carefully considering the natures of the structures so as to avoid getting false conclusions.