消能减振结构阻尼器安装位置优化探讨
首发时间:2013-03-06
摘要:当结构附加阻尼器形成消能减振结构时,结构的阻尼矩阵是非比例矩阵,无法通过振型解耦,即无法获得相应振型的阻尼比。本文从阻尼器的单元阻尼矩阵出发,将单元阻尼矩阵整合成为整体附加阻尼矩阵,利用规范中提及的强迫解耦法获得消能减振结构的附加振型阻尼比。利用以上获得附加阻尼比的方法,进一步研究了附加阻尼器的消能减振结构的模态阻尼优化设计方法,确定了决定阻尼器放置位置的位置敏感函数。通过算例验证,本文提出的确定阻尼器放置位置的敏感函数与实际情况相符,且方法简单,易于工程实际的应用。
关键词: 防灾减灾工程及防护工程 消能减震结构 振型阻尼比 强迫解耦法 模态阻尼优化
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Modal Damping Dptimization of Dassive Dnergy Dissipation System
Abstract:For the addition of dampers, passive energy dissipation system has a non-proportional damping matrix, which can't be decoupled to obtain the modal damping ratio. In this paper, we form the element damping matrix ,integrate the element damping matrix to form the additional holistic damping matrix. Get the modal damping ratio by approximate decoupling method. Based on the above results, a modal damping optimization method for general dampers is developed, presenting the location sensitive function. Finally, the validity of the method is demonstrated through numerical examples presented in the present paper.(10 Points, Times New Roman)
Keywords: Disaster prevention and mitigation engineering and protective engineering passive energy dissipation system modal damping ratio approximate decoupling method modal damping optimization
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