建筑结构STMD参数优化研究

Optimal Parameters for Building Structure STMD

以含半主动调频质量阻尼器(STMD)的建筑结构为研究对象,借助于结构抗震性能指标对STMD参数的灵敏度分析来确定最优的STMD参数。在建模方面,为了减少灵敏度分析的误差,本文推导了建筑结构为多自由度系统时的结构振动方程;在灵敏度公式推导方面,在文献[6-8]的基础上,结合本文研究的特点,推导了结构抗震性能指标对STMD参数的灵敏度计算公式,在优化计算方面,考虑到采用常规优化算法很难实现,本文采用了基于实代码遗传算法的优化策略,最后本文给出了一个计算实例。

Taking the building structures with semi-active tuned mass damper(STMD) as the object,the sensitivity of structural anti-seismic performance index to the parameters of STMD is analyzed to acquire the optimal parameters of STMD.During constructing the model,the vibration equations for the structure transformed as multi-degree of freedom system are derived to reduce the error of sensitivity analysis.The sensitivity evaluation formula of structural anti-seismic performance index to the parameters of STMD is attained.And the real coded genetic algorithm is adopted to solve the difficulty from the ordinary optimum algorithms.An example shows the effectiveness of the presented algorithm.