基于Workbench的法兰接头紧密性分析

Flange Joint Tightness Analysis based on Workbench

法兰接头广泛应用于各行各业,尤其是石油化工行业。法兰接头在工作环境中一旦发生泄漏,将会造成不可挽回的损失,因此保证法兰接头在工作环境中的密封性良好是十分重要的。在实际的工程运用中,可以运用相关的检测仪器准确地检测出法兰接头处于工作状态下的紧密性情况,不过这对检测仪器的性能、精度要求较高,仪器价格昂贵;且还需安排专人检测,增加了人工成本,检测过程也会费时费力。除了运用仪器检测的方法,还可以应用有限元仿真软件对法兰接头各部件进行模拟分析,将法兰接头各部件材料参数、螺栓预紧力等输入相应的分析模块中,可以得出法兰接头的紧密性情况。在不考虑其他外部因素的影响条件下,由有限元分析软件分析可得,法兰螺栓DN100、PN100法兰接头螺栓预紧力为螺栓材料的0.5倍的屈服应力(即135.1 kN)时,法兰接头的法兰盘、螺栓螺母、垫片骨架的强度均符合工况要求,垫片压紧性良好,法兰接头的紧密性良好。

Flange joints were widely used in all walks of life,especially in the petrochemical industry.Once the flange joint leaked in the working environment,it would cause irreparable losses,so it was very important to ensure that the flange joint had good sealing in the working environment.In actual engineering application,relevant testing instruments could be used to accurately detect the tightness of the flange joint in the working state,but this required high performance and accuracy of the testing instrument,and the instrument was expensive.It was also necessary to arrange special personnel for testing,which increased the cost of human capital,and the testing process was also time-consuming and laborious.In addition to the use of instrument detection methods,finite element simulation software could also be used to simulate and analyze each part of the flange joint,and the material parameters and bolt pretension of each component of the flange joint would be entered into the corresponding analysis module,and the tight phase of the flange joint could be obtained.Without considering the influence of other external factors,it could be obtained through finite element analysis software analysis that when the bolt preload of flange bolts DN100 and PN100 flange joints was 0.5 times the yield stress of the bolt material,or 135.1 kN,the strength of the flange plate,bolt nut,and gasket skeleton of the flange joint met the working condition requirements with good gasket compaction and good tightness of the flange joint.