连接方式对隔水管法兰试压应力分布的影响

Influence of Conjunction Method upon Flank Stress Distribution in Pressure Testing of Riser

在水压试验工况下,通过ANSYS有限元软件分析了隔水管法兰在卡箍连接和螺栓连接时的应力分布,应用ASMEⅧ压力容器分析设计标准对各高应力区进行了应力分类强度评定。结果表明:2种连接方式下隔水管法兰的高应力区分布位置基本一致,均包括法兰上各孔的连接处(筋)和节流/压井管线孔边缘处(孔边),但是采用卡箍连接方式时,这2处的应力均超过ASME强度评定标准值;采用螺栓连接方式时,法兰各处应力均能满足ASME强度评定标准要求。该分析结果对隔水管水压试验装置的设计提供了理论依据。

Abstract： In situation of water pressure testing of riser, based on ANSYS finite element software, stress distribution of riser flange is analyzed when using clamp connections and bolt connections. In addition,it developed the strength assessment at the high stress areas according to the ASME Ⅷ standard. The results reveal that the distribution of high stress areas is similar in lwo flange connections. Both contains the connect location at flank holes and the edge at flank biggest holes. However,when using clamp connections,the stress in these two areas is too high to satisfy the ASME Ⅷ standard. In contrast,when using the bolts conjunction,the flank strength entirely sat isfies the ASME Ⅷ standard. This analysis result provides a theoretical basis for designing water pressure testing device of riser.