时变轴向力作用下柱杆的稳定性

应用运动稳定性理论中的最新结果研究了两端铰接的等截面柱杆在时变阻力和时变轴向力作用下的稳定性问题。主要结论是：当阻尼力和轴向力随时间的变化率很小时，柱杆的平衡位置是稳定的，并且给出了具体的估计式，对于具体问题可以计算出阻力和轴向力的变化规范。

STABILITY OF THE POLE UNDER TIME AXIAL FORCE

In this paper we study the stability of the poles whose ends are fixed and whose across sections are equal under time axial force. Applying the new results of the stability theory, we establish some sufficient conditions under which the equilibrium of the pole is stable. These results provide the theoretical foundation for structure designs and engineering calculation.