To study the reason of appearance of the thermal diffuse crack, Temperature and thermal stress analysis of the steam pipe and correlative branch pipe was performed with finite element analysis method.
本论文进行模拟实验并有限元方法，获得蒸汽管道支管及接管座管壁温度场和热应力的分布规律，阐明热疲劳裂纹产生的原因；
The steam pipe and correlative branch pipe of power plant are detected to appear thermal diffuse crack, which influence the normal run of the generator severely.
发电站蒸汽管道的支管连接部位以及与之相连接的支管接管座处出现的热疲劳裂纹，严重影响了发电机组的安全运行。
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