随机桁架结构几何非线性问题的混合摄动-伽辽金法求解1)
黄斌(),贺志赟,张衡
HYBRID PERTURBATION-GALERKIN METHOD FOR GEOMETRICAL NONLINEAR ANALYSIS OF TRUSS STRUCTURES WITH RANDOM PARAMETERS1)
Huang Bin(),He Zhiyun,Zhang Heng

图8. 铰顶处竖向位移$\upsilon $的概率密度函数图(变异系数为0.25)

Fig. 8. PDF curves of the displacement $\upsilon $(The coefficient of variation is 0.25)