湖南省自然科学基金资助项目（08jj5026）
利用ANSYS对连续梁桥进行模态分析,得到各阶频率及振型数据.利用MATLAB编制程序对振型函数数据进行函数拟合,拟合函数采用等截面直梁的振型函数通式,相比样条插值函数和振型函数修正方法,该方法拟合得到的振型函数更为简单,更加和实际振型吻合,便于工程应用.利用拟合的振型函数,对移动荷载作用下连续梁的响应进行分析,应用方便,且得到相当好的结果.该方法具有较好的工程应用价值.
The frequencies and modal data of a continuous bridge were obtained using finite element method. Based on the software MATLAB, the modals were expressed as modal functions of fit. Using the fitting function, the response of the continuous bridge with moving load was studied. Compared with the method using spline function or modified modal function, the present method is more convenient in engineering application.
钱长照,陈得良.振型函数拟合方法求解移动荷载作用下连续梁的响应[J].动力学与控制学报,2010,8(3):263~266; Qian changzhao, Chen Deliang. Solving the response of continuous bridge using the modal function of fit[J]. Journal of Dynamics and Control,2010,8(3):263-266.
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