基于回传波射矩阵法的门式刚架轻钢结构模态分析

MODAL ANALYSIS OF STEEL STRUCTURE OF LIGHT-WEIGHT BUILDINGS WITH GABLED FRAMES BASED ON METHOD OF REVERBERATION-RAY MATRIX

将回传波射矩阵法应用于门式刚架轻钢结构的模态分析中。通过搜索出单位脉冲荷载作用下的位移频响函数曲线峰值得到结构的固有频率,并绘制出部分峰值时的结构位移响应图形,即得到振型。与有限元分析软件ANSYS的计算结果进行比较,表明该方法在门式刚架轻钢结构模态分析中是有效、实用的且具有足够精度。

Method of reverberation-ray matrix was applied to the modal analysis of a steel structure of light-weight buildings with gabled frames. Natural frequencies of the structure were obtained through means of searching the peaks of frequency response function curve of displacement under the unit impulse load. Some deformation structural displacement response pictures of the whole structure that was mode of vibration were also drew when the curve reached their peaks. In comparison with the results from ANSYS, this method was effective, practical and showed enough accuracy in modal analysis of steel structure of light-weight buildings with gabled frames.