In this paper, starting with the equilibrium equations of curved open tube and using the method of fictitious distributing loading, we have obtained a system of ordinary differential equations with variable coefficients which can be used to calculate critical loads of structures. 本文从薄壁开口曲杆的平衡方程出发,应用假想分布载荷法,导出一组关于曲杆稳定性的变系数常微分方程。
Fictitious Variable Method to Calculate the Deformation Capacity Reliability of Aseismatic Structures 虚拟变量法求抗震结构的变形能力可靠度
Using the method of fictitious load, the author has formulated the governing equations of Reissner's and Kirchhoff's plate of variable thickness, respectively, and solved them by the spline integral equation method of unit rigidity plate. 本文用虚载法分别导出Reissner型和Kirchhoff型变厚板方程,它们各自等价于一块单位刚度板,从而可用等厚板样条积分方程法来求解。
Also chooses size, the rate of increase of the sales income, administration and whether supervision authorities are to hold share and the trade fictitious variable as control variables. 选择了规模、销售收入增长率、管理层是否持股以及行业虚拟变量为控制变量。