高强钢B780CF岔管制造工艺与水压试验研究

发布时间：2018-03-02 17:23

本文选题：钢岔管　切入点：B780CF　出处：《郑州大学》2015年硕士论文　论文类型：学位论文

【摘要】：钢岔管是水电站地下工程的关键部位,对整个水电站的安全运行有重要的影响。高水头、大HD值水电站工程钢岔管所需的钢材多为国外进口。某电站钢岔管采用国产B780CF钢材制造,是国内首次在高水头抽水蓄能电站上采用国产780MPa级高强钢的钢岔管。本文对该钢岔管的制造工艺、有限元分析、水压试验及相关测试进行研究。为了使该岔管制造质量能够满足设计及规范要求,本文针对该岔管的结构特点,分析制造的重点和难点,编制相关制造工艺;结合钢岔管的实际使用工况,制定水压试验方案;建立岔管的有限元模型,提取测试点的应力数据;根据同类岔管测试经验和设计要求,制定岔管水压试验测试方案;将有限元计算结果与试验测试结果进行对比分析。分析结果表明:该国产高强钢B780CF岔管的制造质量满足设计及规范要求;钢岔管水压试验时应力变化趋势与有限元计算结果基本一致,计算结果中的高应力区与实际测试结果吻合。通过对本案岔管产品的研究,为780MPa级高强钢板的国产化提供依据,并为国内同类岔管产品的设计和制造提供参考。
[Abstract]:Steel branch pipe is the key part of underground project of hydropower station, which has an important effect on the safe operation of the whole hydropower station. The steel forked pipe of large HD value hydropower station is mostly imported from abroad. The steel bifurcation pipe of a certain power station is made of B780CF steel made in China. It is the first time in China that the steel branch pipe of domestic 780MPa high strength steel is used in the high head pumped storage power station in China. In this paper, the manufacture technology of the steel branch pipe is analyzed by finite element method. In order to make the manufacturing quality of the branch pipe meet the requirements of the design and specification, this paper analyzes the key points and difficulties in the manufacture of the branch pipe according to the structural characteristics of the branch pipe, and formulates the relevant manufacturing process. According to the practical working conditions of steel bifurcation pipe, the hydraulic test scheme is established, the finite element model of the bifurcation pipe is established, the stress data of the test point is extracted, and the water pressure test test scheme of the bifurcation pipe is established according to the test experience and design requirements of the same kind of bifurcation pipe. The finite element calculation results are compared with the test results. The results show that the manufacturing quality of the B780CF bifurcation pipe of the domestic high strength steel meets the design and specification requirements. The variation trend of stress in hydraulic pressure test of steel bifurcation pipe is basically consistent with the result of finite element calculation, and the high stress zone in the calculation result is in agreement with the actual test result. Through the research on the product of bifurcation pipe in this case, this paper provides the basis for the localization of 780MPa high strength steel plate. It also provides reference for the design and manufacture of similar branch pipe products in China.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TV732.43

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