多重调谐质量阻尼器控制单层非对称结构扭转振动的设计参数

研究了用两组相同的MTMD控制单层非对称结构扭转振动的最优设计参数。MTMD具有相同的刚度和 阻尼系数但不同的质量。MTMD被布置在最优位置。MTMD最优参数的设计准则定义为:结构最大扭转角位移动力放 大系数的最小值的最小化。MTMD的有效性设计准则定义为:结构最大扭转角位移动力放大系数的最小值的最小化与 无MTMD时结构最大扭转角位移动力放大系数的比值。基于定义的设计准则,研究了非对称结构的标准化偏心系数 (NER)和扭转对侧向频率比(TTFR)对处于最优位置MTMD最优设计参数和有效性的影响。

Design Parameters of Multiple Tuned Mass Dampers for Attenuating Torsional Vibration of One-story Asymmetric Structures

Investigated are the optimum design parameters of two sets of identical multiple tuned mass dampers(MTMD)for one-story asymmetric structures. Each one of the MTMD possesses the same stiffness and damping coefficient but unequal mass. Two sets of identical MTMD are housed at the optimum placements. The design criterion of the MTMD optimum parameters is defined as the minimization of the minimum values of the maximum torsional displacement dynamic magnification factors. The desgn criterion of the effectiveness of the MTMD is defined as the ratio of the minimum of the minimum values of the maximum torsional displacement dynamic magnification factors to the maximum of the torsional displacement dynamic magnification factors of the asymmetric structure without MTMD. In terms of the above-defined design criteria, an evaluation is made on the influences of the normalized eccentricity ratio(NER)and the torsional to translational frequency ratio(TTFR)on the optimum design parameters and effectiveness of the MTMD set at the optimum placements.