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将罚函数应用于地下埋藏式压力钢管的非线性有限元强度分析 ,考虑了回填混凝土和围岩的弹塑性、初始地应力以及开挖支护引起的二次应力的影响 ,将更充分地发挥压力钢管的实际承载能力 ;考虑内水压力作用下钢衬的弯曲和剪切效应 ,对大直径管的应力将更接近于实际应力状态
The penalty function is applied to the nonlinear finite element strength analysis of underground buried penstocks and will be given full consideration by taking into account the elastic-plastic properties of the backfill concrete and the surrounding rock, initial geostress and secondary stress caused by excavation and support The actual carrying capacity of the pressure pipe; considering the bending and shearing effect of the steel lining under the effect of the internal water pressure, the stress on the large diameter pipe will be closer to the actual stress state