桁架结构阻尼控制的绝对值模态应变能法

本文阐述了近似求解复特性值问题模态阻尼比的模态应变能法（ＭＳＥ）和绝对值模态应变能法（ＡＶＭＳＥ），分别用两种方法计算了空间桁架结构应用粘弹性阻尼器进行阻尼控制时结构的模态阻尼比。完成了空间桁架结构模型的粘弹性阻尼控制实验。理论分析与实验结果比较显示，当结构中粘弹性的成分较大时，ＡＶＭＳＥ对复特征值问题中模态阻尼比的近似计算给出更准确的结果。

ABSOLUTE VALUE MODAL STRAIN ENERGY METHOD FOR VISCOELASTIC DAMPING CONTROL OF TRUSS STRUCTURE

The Modal Strain Energy Method(MSE) and Absolute Value Strain Energy Method(AVMSE) to solve the complex eigenvalue problems approximately are described briefly.The modal damping ratio of space truss structure with added viscoelastic dampers is calculated using both MSE and AVMSE methods for damping control of the structure.The experiment in damping control of a truss structure adding viscoelastic dampers is completed.The comparison between the analytical results and experimental results shows that the AVMSE method is more advanced and accurated than the MSE method while the effect of viscoelasticity to the structure is larger for calculating the modal damping ratio of the complex eigenvalue problems.