高压管箱法兰的强度和刚度有限元分析

Strength and Stiffness FEA of the High Pressure Channel Flange

螺栓法兰连接是石化设备和管道中应用最为广泛的密封形式,对其完整性和紧密性分析仍是工程中亟待解决的问题。基于强度和密封要求,借鉴Waters法对法兰力学模型的假定,采用ANSYS数值分析技术,对五段冷却器管箱法兰在预紧、操作、设计和水压试验4种工况下进行了有限元应力分析。依据应力分类的原则,结合第三强度理论对其管箱法兰承载能力进行强度评定,同时按照ASMEⅧ-1对法兰转角限制的要求进行刚度评定,为实际应用提供参考。

Boh flange connections are widely used in petrochemical equipments and pipes, and the analysis of their integrity and tightness is still one of the most urgent problems that need to be solved. Based on the requiremen flange built by flange of a five ts of strength and sealing and with reference to the assumptions for the mechanical model of the method of Waters, the finite element stress analysis was carried out on the channel -stage intercooler under pre-tightening, operating, design and hydrostatic test conditions by the ANSYS structure analysis software. The strength evaluation for the bearing capacity of the channel flange was carried out according to the stress categorization principle and in combination with the Mises strength theory. At the same time, the stiffness evaluation was performed according to the requirements of the flange deflection angle in ASME ASMEⅧ-1 code, which provides valuable reference for practical applica- tions.