【摘要】 为了解决石化行业中塔设备连接法兰腐蚀后的连接可靠性问题,降低生产过程中的事故发生概率,对法兰校核方法进行了研究,并结合工程实例,提出了用有限元软件AxiPRO对法兰连接系统在内外载荷共同作用下的强度和刚度校核方法,克服了法兰设计校核标准中不考虑外部载荷的影响和只进行强度计算的弊端.首先对法兰连接系统进行强度校核,通过等效应力原则确定连接系统中的危险区域,考核其是否满足强度要求;然后对法兰密封性进行了计算,根据垫片应力分布情况推断法兰的泄漏情况及泄漏趋势,最后给出了法兰泄漏预判断的有限元分析方法流程.更多还原

【Abstract】 To solve the reliability problem of flange connection which is caused by the corrosion of tower equipment in the petrochemical industry and to decrease the accident rate in producing process,the finite element checking method of flange was discussed.Combined with the analysis of engineering project example,a finite element method was put forward to test the intensity and rigidity of the flanges under the combined action of internal and external loads.This method overcame the disadvantages that the check and design standards of flanges only considered the calculation of intensity regardless of the impact of external loads:Firstly,the intensity of the flange connection system was checked to ensure the intensity requirement.Secondly,the sealing characteristic of the flange was calculated,and the leakage situation and trends were predicted according to the stress distribution of the gasket.Finally,a finite element analysis process for pre-judgment of the flange leakage was presented.更多还原