| 再热器外接管座温度场与热应力的有限元分析 |
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| 引用本文： | 俞自涛,洪荣华,胡亚才,范利武,岑可法. 再热器外接管座温度场与热应力的有限元分析[J]. 热力发电, 2005, 34(5): 17-19 |
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| 作者姓名： | 俞自涛 洪荣华 胡亚才 范利武 岑可法 |
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| 作者单位： | 浙江大学,浙江,杭州,310027;浙江大学,浙江,杭州,310027;浙江大学,浙江,杭州,310027;浙江大学,浙江,杭州,310027;浙江大学,浙江,杭州,310027 |
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| 摘 要： | 进行了再热器对空排气管三通管座的温度场和热应力的有限元分析，并选取机组起动后第50min、200min和480min3个点的数据加以讨论。结果发现，由于管道内形成的冷凝水周期性地回流或溢流至再热器外接管内侧，使角焊缝应力集中处形成了热疲劳，并造成管子产生裂纹。
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| 关 键 词： | 再热器 对空排气管 三通管座 温度场 热应力 有限元分析 |
| 文章编号： | 1002-3364(2005)05-0017-03 |
ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD |
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| YU Zi-tao,HONG Rong-hua,HU Ya-cai et al. ANALYSIS OF TEMPERATURE FIELD AND THERMAL STRESS FOR EXTERNALLY CONNECTED PIPE SOCKETS OF REHEATER BY USING THE FINITE ELEMENT METHOD[J]. Thermal Power Generation, 2005, 34(5): 17-19 |
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| Authors: | YU Zi-tao HONG Rong-hua HU Ya-cai et al |
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| Abstract: | The temperature field and thermal stress of tee pipe sockets for exhaust pipes to atmosphere from reheater have been analyzed by using the finite element method, the data at time points of 50, 200, and 400 minutes after startup being discussed. It is found from the results that the main cause leading to crack on pipes is as follows: When condensed water in said pipes periodically flows back or overflows to the interior of externally connected pipes on reheater, making the corner welding seams where the thermal stress being concentrated to produce thermal fatigue. |
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| Keywords: | reheater temperature field thermal stress finite element analysis |
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