CAJ | 학술논문

文章采用商用有限元结构分析软件 ANSYS 对一典型联合循环机组的高中压外缸的热应力进行三维数值分析研究。根据给定的温度边界条件，对汽缸在无、有隔热罩两种结构下进行热应力和相应的热变形计算。计算结果表明在无隔热罩的情况下，汽缸的应力已超出了材料的允许强度。汽缸的再热蒸汽温度提高后采用隔热罩以及蒸汽冷却，有效地降低了汽缸内壁的温度，确保了汽轮机运行的安全。
문장채용상용유한원결구분석연건 ANSYS 대일전형연합순배궤조적고중압외항적열응력진행삼유수치분석연구。근거급정적온도변계조건，대기항재무、유격열조량충결구하진행열응력화상응적열변형계산。계산결과표명재무격열조적정황하，기항적응력이초출료재료적윤허강도。기항적재열증기온도제고후채용격열조이급증기냉각，유효지강저료기항내벽적온도，학보료기륜궤운행적안전。
In this paper, commercial finite element structure analysis software ANSYS is adopted to make a 3D numerical investi-gation on the thermal stress of HIP outer casing of a typical combined cycle unit. Basing on the given temperature boundary condi-tion, thermal stress calculation and corresponding thermal deformation calculation are conducted on both casing with thermal shield and without thermal shield. The calculation result suggests that the thermal stress of the casing will go beyond the allowed intensity of casing materials without the thermal shield. In other words, after the reheat steam temperature goes up, the inner wall temperature of the casing will drop effectively because of the adoption of the thermal shield and steam cooling, so that the safe operation of the casing is secured.