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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
In this paper, modal strain energy method (MSE) and absolute mode strain energy method (AVMSE) for approximating the modal damping ratio of complex property problems are described. Two methods are used to calculate the spatial truss structure with viscoelastic dampers Modal Damping Ratio of Damping Control Structure. The viscoelastic damping control experiment of the space truss structure model is completed. The comparison between theoretical analysis and experimental results shows that the approximate calculation of modal damping ratio in the complex eigenvalue problem gives more accurate results when the viscoelastic components in the structure are large