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作为一种新型钢管连接型式,高颈法兰综合了刚性法兰和柔性法兰的特点,并具有加工自动化程度高、整体性好等优点。本课题的前期研究表明:在受力过程中,柔性法兰中法兰板外边缘相互抵紧,法兰板根部处随着荷载的增加而张开,总体上表现出柔性的受力特点,法兰板的受力模式为简支梁形式;而高颈法兰中法兰板的外缘和根部则均随着荷载的增加而张开,总体上表现出刚性的受力特点,法兰板的受力模式为悬臂梁形式。最后,基于高颈法兰的受力模式,提出了高颈法兰中法兰板应力的简化计算公式,按该简化公式计算的结果与试验值之间的误差在10%以内。
As a new type of steel pipe connection, high-neck flange combines the characteristics of rigid flange and flexible flange, and has a high degree of automation, integrity and so on. The preliminary research of this project shows that during the process of stressing, the outer edges of the flange plates in the flexible flange are in close contact with each other, and the root of the flange plate expands with the increase of the loads, showing a generally flexible force characteristic. The flange plate is in the form of simply supported beam, while the flange and root of the flange plate in the high-necked flange are both open with the increase of the load, showing the rigid force characteristics as a whole. The flange The force mode of the plate is in the form of a cantilever. Finally, based on the stress mode of the high-neck flange, a simplified formula for the flange stress in the high-neck flange is proposed. The error between the calculated result and the experimental value is less than 10%.