用附加质量与刚度调整无阻尼结构动态特性  

MODIFYING THE DYNAMIC CHARACTERISTIC OF AN UNDAMPED STRUCTURE BY MASS AND STIFFNESS ADDITION TECHNIQUE

作　　者：王茂龙[1] 刘明[2] 曹双寅[1] 

机构地区：[1]东南大学土木学院,南京210096 [2]沈阳建筑工程学院土木系,沈阳110015

出　　处：《工程力学》2004年第5期178-182,共5页Engineering Mechanics

基　　金：国家十五科技攻关课题子课题(2002BA806B-4)

摘　　要：提出一种动态特性调整的新方法以满足结构优化设计调整要求。该方法根据原结构模型的动态特性,利用与调整点自由度相关的频率特性函数,通过对无阻尼自由振动方程的推导,给出结构局部质量或刚度调整的通解。数值算例表明,应用通解计算值调整模型得到的动态特性可以满足预定的设计要求,1/2比例三层砌体模型实验显示了调整方法的实用性。A new dynamic characteristic modification method is proposed for structural optimum design and modification. Based on the dynamic characteristic of an original model, the transform analysis of undamped system equation is performed with the frequency characteristic functions at designated modification freedoms, and the general expressions of local mass and stiffness parameters are derived. Numerical examples and a three-story masonry of half scale model test are given to demonstrate the validation of the modification method and the general expressions, and the modified results can meet the predetermined requirements.

关 键 词：结构调整 频率特性函数 动态特性 无阻尼 附加技术 

分 类 号：O321[理学—一般力学与力学基础]