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基于均匀化原理,推导了考虑沿格栅加筋圆锥壳体随母线变化的等效刚度阵和等效热膨胀系数,并采用前屈曲薄膜理论给出了在温度和均布外压载荷作用下格栅加筋圆锥截顶壳体稳定性分析的总势能表达式。基于最小势能原理得到了该壳体总体失稳的临界载荷值解析表达式,对典型复合材料格栅加筋截顶圆锥壳体的稳定性计算结果与有限元法所得结果相比较,验证了本文中方法的适用性。基于文中提出的方法,通过对不同温度条件下具有不同顶锥角复合材料格栅加筋截顶圆锥壳体热-力屈曲分析结果的讨论,指出温度对复合材料格栅加筋截顶圆锥壳体稳定性的影响程度将随其顶锥角增加而增大。
Based on the principle of homogenization, the equivalent stiffness matrix and equivalent thermal expansion coefficient along with the busbar deformation of the conical stiffened shell are deduced. The effect of temperature and uniform external pressure load The total potential energy expression of stability analysis of grid stiffened cone truncated. Based on the principle of minimum potential energy, the analytical expression of the critical load value of the overall instability of the shell is obtained. Compared with the results obtained by the finite element method, the stability of the typical composite grid stiffened truncated cone shell is verified. The applicability of the method. Based on the method proposed in this paper, the results of the thermo-mechanical buckling analysis of a truncated cone-shaped frusto-conical shell with different cone angles under different temperature conditions are discussed. It is pointed out that the effect of temperature on the truncated cone- The effect of body stability will increase with increasing top cone angle.