【摘要】 多重调质阻尼器(MTMD)是由多个具有不同频率、不同质量或不同阻尼的调质阻尼器构成的动力吸振器群,被广泛应用于结构的被动控制中。采用频域分析方法考虑TMD在多自由度结构中的布置,推演了具有MTMD多自由度结构振动控制振型广义坐标的频率响应方程,以一座大跨斜拉桥为例,针对结构振动的控制振型,进行了MTMD参数分析,并研究了MTMD控制下斜拉桥在移动荷载作用下的竖向振动,计算结果表明,在随机不平顺桥面条件下,MTMD能够有效减小结构在移动荷载激励下的竖向动力响应。更多还原

【Abstract】 Multiple turned mass damper(MTMD) is a kind of dynamic absorber group that consists of a large number of small oscillators with distributed frequencies and damping or mass.Taking the installation of TMD into account,the frequency-amplitude function has been derived for MDOF structures with MTMD by using the frequency-domain analysis method.Based on this function,the parameter optimization and design of MTMD are carried out for a long-span cable-stayed bridge.The numerical results show that MTMD could effectively reduce the dynamic responses of the structure which was affected by moving vehicle load due to irregular cross-section pavement.更多还原