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研究用房屋建筑的屋盖作为调谐质量阻尼器(TMD)的质量块 ,用屋盖与其支承结构之间的摩擦替代TMD的粘滞阻尼时 ,摩擦的减振效果以及摩擦因数的模糊优化问题。数值分析算例的结果表明 ,屋盖摩擦 TMD系统使结构基本振型对地面运动的最大响应减少了 6 0 % ,且有效地控制了其它振型的响应 ;在中等以上强度的地面运动作用下 ,摩擦因数不大于 0 .5时 ,最优摩擦力可以二次降低结构的反应可达 30 % ,占总降低量的 17%。利用摩擦耗能后 ,基于屋盖的 TMD系统变得更简单实用
The roof of a building is considered as a mass of a tuned mass damper (TMD), a fuzzy optimization problem of the friction damping effect and the friction coefficient when the TMD’s viscous damping is replaced by the friction between the roof and its supporting structure. The results of the numerical analysis show that TMD system can reduce the maximum response of the structure fundamental mode to ground motion by 60% and effectively control the response of other modes. Under the moderate ground intensity above ground motion , Friction coefficient is not greater than 0 .5, the optimal friction can be secondary reduction of the structure up to 30% of the reaction, the total reduction of 17%. The roof-based TMD system becomes simpler and more practical with friction-dissipated energy