计算压杆临界力,一般应用静力法或能量法。对于边界条件比较复杂的压杆,例如两端同时带有抗转弹性支承、横向弹性支承的杆,静力法将导致复杂的超越方程,解此超越方程不仅困难而且惰度也不易保证。若用能量法解上述问题,往往由于事先不知道杆在临界状态时的弹性曲线方程而无法计算。 Calculate the critical pressure of the bar, the general application of static method or energy method. For the more complex boundary conditions of the strut, for example, both ends with anti-elastic support, transverse elastic support rod, static method will lead to complex transcendental equations, this transcendental equation is not only difficult but also inertness is not easy to guarantee. If we use the energy method to solve the above problems, we often can not calculate the elastic curve equation when the rod is in the critical state without prior knowledge.