采用平面梁单元计算两铰抛物线拱的自由振动特性-Plane beam element calculation using the two hinged parabolic arch of the free vibration characteristics of

采用平面梁单元计算两铰抛物线拱的在初始条件下自由振动，并对时程曲线结果进行FFT变换-Plane beam element calculation using the two hinged parabolic arch at the initial conditions of free vibration, and the results of time-curve FFT transform

采用平面梁单元计算两铰抛物线拱的在初始条件下自由振动，并对时程曲线结果进行FFT变换，求得频率-Calculation of plane beam element with two hinged parabolic arch of the free vibration in the initial conditions, and the results when the FFT transform curves, obtained by frequency

ivf Fortran 有限元计算 一端固支 另一端自由移动的二维梁结构的振动-calculate the 2D beam vibration based on Finite Element Method in Fortran