critical loads短语¹⁴⁴⁹⁷²⁺² 基本例句 极限承载力 The deflection differential equation of string has been first solved by using infinite series method, and the formula of the buckling critical loads has been obtained with energy method. 首次用无穷级数法求解了其临界屈曲时的挠曲线微分方程，并同时用能量法给出了其临界屈曲载荷计算公式。 cnki