工程上经常采用折减系数(又叫纵向弯曲系数或稳定系数)设计压杆截面,而确定折减系数则往往采用试算法.对于一些常用截面(如圆形、空心圆形、正方形、矩形等截面)的压杆设计,能否避免试算法的重复运算过程,而只需一次运算即可确定折减系数(?)呢?以设计圆截面压杆为例,若已知压杆长度l,长度系数μ,许用应力[σ],承受压力P,求截 Engineering often use reduction factor (also called longitudinal bending coefficient or stability coefficient) to design the compression rod section, and to determine the reduction factor often uses trial algorithm. For some common sections (such as circular, hollow circle, square, rectangle, etc.) Cross-section compression rod design, can avoid the repeated calculation process of the trial algorithm, but only one calculation to determine the reduction factor (?)? To design a circular cross-sectional pressure rod, for example, if the pressure rod length l, Length coefficient μ, allowable stress [σ], pressure P, interception