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建立了主管道三维有限元模型,借助ANSYS软件对其加热过程进行温度场、应力场的计算。采用分段加热,第一阶段初始温度为20℃,加热速度范围为1.5℃/min到24℃/min。加热至600℃保温0~5 h。第二阶段加热速度范围为2.5℃/min到24℃/min,加热至1100℃保温0~3 h。研究了不同加热速度及均热时间对管道温度场、应力场的影响。分析结果表明,以1.5℃/min加热到600℃保温5 h然后再以2.5℃/min加热到1100℃,保温3 h,在该工艺下主管道不会发生塑形畸变,且比实际加热工艺时间更短,可为今后制定主管道加热工艺提供参考。
The three-dimensional finite element model of the main pipe was established, and the calculation of temperature field and stress field of the heating process by ANSYS software. Using staged heating, the initial temperature of the first stage was 20 ° C and the heating rate ranged from 1.5 ° C / min to 24 ° C / min. Heated to 600 ℃ insulation 0 ~ 5 h. The second stage of the heating rate range of 2.5 ℃ / min to 24 ℃ / min, heated to 1100 ℃ insulation 0 ~ 3 h. The effects of different heating rates and soaking time on the temperature field and stress field of the pipeline were studied. The results show that the main pipe will not be distorted in shape under the condition of 1.5 ℃ / min heated to 600 ℃ for 5 h and then heated to 1100 ℃ at 2.5 ℃ / min for 3 h. Compared with the actual heating process Shorter time, can provide a reference for the future development of the main pipe heating process.