地下储氢罐套管密封结构强度分析及优化设计OA

This study focuses on the connection part of the casing of the hydrogen storage tank at a hydrogen refueling station.Using the finite element analysis method,the strength of the sealing surface of the storage tank under 45 MPa gas pressure is analyzed,and the stress distribution pattern of the sealing surface of the storage tank under different working conditions is obtained.At the same time,by comparing the stress extreme values of the sealing surface under different working conditions,the limit value of the casing pre-tightening force is determined.Based on the response surface optimization module in the ANSYS software,with the sealing surface contact pressure greater than 462.14 MPa and the minimum stress intensity as the optimization target,a sealing surface size optimization scheme for the casing port is proposed.The results show that the limit value of the casing pre-tightening force is 2.8875×106 N.In addition,after optimization,the sealing surface contact pressure remains basically unchanged,and the maximum stress value is reduced by 10%.This not only ensures the sealing effectiveness but also reduces the stress value.The optimal shoulder angle,the distance between the sealing arc surface and the tapered thread,and the arc surface radius are determined to be 56.32°,13.037 mm and 18.77 mm,respectively.The structural size optimization of the sealing surface between the hydrogen storage tank casing and the interface has reference significance.