超高压容器的连接结构安全仿真研究  

Numerical simulation on safety of ultra-high pressure vessel’s connection structure

作　　者：吕亮国 马荣青 许锐冰 邓贵德[3] 葛青 孟可可 LYU Liangguo;MA Rongqing;XU Ruibing;DENG Guide;CE Qing;MENG Keke(Mechanical Engineering School,Inner Mongolia University of Science and Technology,Baotou 014010;Inner Mongolia North Heavy Industries Group Co.,Ltd.,Baotou 014033;China Special Equipment Inspection And Research Institute,Beijing 100029;Beijing Shangqingyuan Construction Engineering Co.,Ltd.,Beijing 101502)

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古包头014010 [2]内蒙古北方重工业集团有限公司,内蒙古包头014033 [3]中国特种设备检测研究院,北京100029 [4]北京尚清源建设工程有限责任公司,北京101502

出　　处：《机械设计》2023年第10期66-75,共10页Journal of Machine Design

摘　　要：针对超高压容器设计标准GB/T 34019—2017《超高压容器》可供参考的设计实例较少,以及超高压容器设计过程复杂的现状,文中采用ANSYS有限元软件对某规格超高压反应器连接结构进行数值模拟,得出超高压容器整体及连接部位在施加工作载荷(150 MPa)之后的应力分布云图。结果表明:超高压容器筒体下端出现应力集中现象,其最大值为525.67 MPa;其上下法兰内锯齿螺纹所受等效应力随着啮合的锯齿螺纹圈数的增加呈指数下降,应关注法兰内部啮合锯齿螺纹前3扣;其上下端盖外锯齿螺纹所受等效应力随着啮合的锯齿螺纹圈数的增加呈抛物线变化,先升高后下降,应关注端盖内部啮合的锯齿螺纹前6扣;在正常工作压力循环(0~150 MPa)下,上下端盖与法兰啮合螺纹疲劳次数为22880。其有限元分析结果对超高压容器日常安全运营、连接结构失效分析及其标准应用有一定的指导意义。As for the design standard of ultra-high pressure vessels GB/T 34019—2017 Ultra High Pressure Vessel,there were few examples,and the process of calculation and design is complicated.In this article,numerical simulation is carried out an ultra-high pressure reactor's connection structure by means of the finite element software ANSYS.The stress distribution of the ultra-high pressure vessel and its connecting parts is worked out after the working load(150 MPa)is applied.The results show that stress concentration occurs frequently on the bottom end of the ultra-high pressure vessel's cylinder,with the maximum of 525.67 MPa.The equivalent stress of the zigzag groove at the up-down flanges decreases exponentially with the ever-growing number of engaging slots;attention should be paid to the front 3 buckles of the serrated thread inside the flange.The equivalent stress of the outer zigzag groove at the up-down end caps suggests a parabolic change,firstly rising and then falling,with the ever-growing number of engaging slots;attention should be paid to the front 6 buckles of the serrated thread inside the end cap.During the normal working pressure cycle(0~150 MPa),the number of thread fatigue at the up-down end caps and flanges is 22880.The FEM results provide guidance for the analysis on daily safe operation,failure in connection structure and standard application of ultra-high pressure vessels.

关 键 词：超高压反应器 连接机构 数值模拟 ANSYS 

分 类 号：TH49[机械工程—机械制造及自动化]