By using the boundary conditions of the statically indeterminate shaft with three fulcrums,the deflection curve square of the shaft is got;By utilizing the energy method to improve the calculation formula, the accurate first order critical speed of the statically indeterminate shaft with three fulcrums is obtained quickly.
通过满足三支点静不定轴的边界条件来求解基本方程,得到多跨静不定轴的挠曲线方程,并应用能量法改进了计算公式,快速准确地求得三支点静不定轴的一阶临界转速。
The difficulty in spectrometer experiment is adjusting the optical axis of telescope to be vertical to the revolving axis of the spectrometer.
大学物理实验中分光计实验的难点在于调节仪器使望远镜光轴垂直于分光计中心转轴。
