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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于导热正反问题耦合解法的增压锅炉汽包应力有限元分析
, PP. 56-61
Keywords: 增压锅炉,汽包,导热正反问题,耦合解法,应力,温度场,ansys软件
Abstract:
为快速得到精确的增压锅炉汽包的应力分布,针对其外壁局部受热的特点,提出了基于导热正反问题耦合解法的汽包瞬态应力求解方法，即采用导热正反问题耦合解法求解复杂边界条件下的增压锅炉汽包温度场,在此基础上，采用二维有限元方法对汽包瞬态理论应力进行计算。同时，利用ansys软件对汽包三维温度场与应力场进行了模拟,并结合实验数据与本文方法计算结果进行了对比。结果表明:基于导热正反问题耦合解法求解的温度场具有较高的精度；本文方法计算的汽包理论应力与ansys软件模拟结果吻合较好，汽包壁上机械应力与热应力的应力集中系数分别比美国asme标准推荐值高24.42％，5.32％。
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