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压杆的无侧移失稳表示在两端无位移的情况下压杆发生弯折,代表压杆的抗折刚度变为零。对应于有侧移失稳抗侧刚度的定义,该文在分析过程中提出抗折刚度的定义,分析了无侧移失稳压杆的物理抗折刚度和轴力等效抗折负刚度,提出了简单的计算公式,给出了弯折位移最大点的位置和二阶效应系数的表格和计算公式,从而为理解压杆的无侧移失稳提供了简便和直观的理论工具。
The non-lateral displacement of the strut shows that the strut undergoes bending without displacement at both ends, indicating that the flexural rigidity of the strut becomes zero. Corresponding to the definition of lateral stiffness and lateral stiffness, this paper presents the definition of flexural rigidity during the analysis, and analyzes the physical flexural rigidity and the equivalent flexural rigidity of the unmanaged slip-regulated rod. A simple calculation formula is given, and the formulas of the position of the maximum point of displacement and the second-order effect coefficient are given. This provides a simple and intuitive theoretical tool for understanding the no-lateral buckling of the strut.