框架式结构自振特性基本规律的研究

A Study on the Basic Relations of the Natural Vibration Characteristics of Framed Structures

本文用动力有限单元法对框架式结构自振特性基本规律进行了一定的研究。结果表明,空间框架作为平面框架进行自振特性分析,不仅自振频率有出入,而且自振振型的变化规律也不一致。本文认为,空间框架式结构无论是低层还是多层或高层作为平面框架问题进行自振特性分析是值得商榷的。

In this paper, the basic relations of the natural vibration characteristics of framed structures have been studied by means of the dynamic finite element method.It is known from the research that when the space framed structure is assumed to be a plane one during the analysis of natural vibration characteristics, not only the natural vibration frequencies obtained possess notable errors, but the variations of the natural vibration modes are also inconsistent. The writers believe that the assumption of all space framed structures regarded as plane ones in the analysis, no matter whether they are low or tall buildings, is still subject to controversy.