摘要： 对三峡水电站压力管道运行期进行温度荷载的有限元和试验对比分析，得出内低外高温度场的温度差变化对管道运行期裂缝宽度开展、管道外壁位移和钢材应力的影响都较小。

Abstract: By comparison of the experimental result and numerical analysis by FEM of thermal effect on pressure penstocks in operation at Three Gorges hydropower station, the conclusion was gotten that temperature field of higher outside the penstocks and lower inside had little effect on cracks development, penstocks deformation or steel stress.