基于傳遞矩陣法的變截面連續(xù)梁動力分析方法
[Abstract]:Starting from the establishment of a more rapid dynamic analysis method for continuous beams with variable cross-section, a new method for the derivation of segmental transfer matrix of continuous beams with variable cross-section is established based on the transfer matrix method. The dynamic time history calculation method under the action of moving spring mass is studied. First of all, based on the differential equation of transverse bending vibration of beams with variable cross-section, the derivation method of the transfer matrix of segmental elements is established. Then, the method of constructing the whole transfer matrix of continuous beams with variable section is established, and the analysis of its natural vibration characteristics is completed. Combined with Newmark- 尾 method, the dynamic time history of a continuous beam with variable cross section excited by moving spring mass is calculated. Finally, a numerical simulation program for dynamic analysis of continuous beam with variable section is developed on the platform of MATLAB. The results show that the dynamic analysis method is not only correct and reliable, but also simpler and more efficient than the finite element method, and has a certain application prospect.
【作者單位】: 西南交通大學(xué)土木工程學(xué)院;
【分類號】:U441.3
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