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一、概述随着压杆高度的增加,其自重与作用在杆上的外力相比已远非微小,在计算杆件的纵向弯曲时,除了考虑作用在杆端的外力外,有时必须考虑沿杆件长度分布的自重压力。等截面直杆在集中力和自重同时作用下的稳定,归结为利用贝塞尔函数解变系数的微分方程,运算较复杂,一般文献上讨论较少。文献列出了下端固定上端自由压杆的解答,其临界力为:
First, an overview With the increase in the height of the strut, its own weight and the role of the force on the rod is far from the tiny, in calculating the longitudinal bending of the rod, in addition to considering the role of the rod end of the external force, sometimes must be considered along the rod The length distribution of self-weight pressure. The stability of equal section bar under the function of concentration and self-weight attributed to the differential equation using Bessel function to solve the problem of variable coefficient is complicated, and the literature is generally not discussed. The literature lists the solution of the lower free end fixed upper free strut, the critical force is: