【摘要】 对凯威特型单层球面网壳结构进行了削弱杆件刚度、附加阻尼器杆件的减振控制研究。削弱部分原有杆件的刚度后,附加阻尼减振杆件。根据阻尼杆件的力学特性,在ANSYS软件中建立附加阻尼杆件的数值计算模型,根据阻尼杆件的不同位置进行结构建模及动力分析,主要考察阻尼杆件的布置位置对网壳结构减振效果的影响,以附加斜杆和附加环杆两种方式为例进行了网壳减振结构地震作用分析。研究结果表明:阻尼杆件的布置位置对网壳结构的减振控制效果有非常重要的影响,通过合理削弱原有杆件刚度并设置附加阻尼杆件,可以使网壳结构的位移、加速度和杆件内力等动力反应有较大的降低。更多还原

【Abstract】 The vibration control of single-layer Kiewitt lattice spherical shell with attached bar-type dampers is studied in this paper.Firstly,according to the mechanical properties of the bar-type dampers and the weakening bars in the shell,computational models of several lattice shells with the dampers are established by using ANSYS software.Secondly,the influences of arranging position of the dampers on the effectiveness of the vibration control are investigated based on the dynamic analysis of the shells.Finally,a frequent seismic analysis of the lattice shell with attached bar-type dampers is conducted.The analysed results are shown that the arranging position of the dampers has significant influence on the effectiveness of the vibration control and that the dynamic responses of the lattice shells can be reduced greatly by a reasonable arrangement of the dampers and the weakening bars of the shell.更多还原