Method for calculating threshold value of additional stress generated by impact of slug flow on pipeline

The invention relates to the technical field of pipeline slug flow impact additional stress value calculation, in particular to a method for calculating a threshold value of additional stress generated by slug flow impact on a pipeline, and the method specifically comprises the following steps: S1, calculating and determining the minimum slug flow volume capable of generating impact, and verifying through finite element calculation and experimental measurement to obtain the threshold value of the additional stress generated by the slug flow impact on the pipeline; obtaining a threshold value of liquid hammer impact formed by the slug flow at the standard elbow; s2, calculating a first slug flow forming part; s3, calculating the impact force of the slug flow on the elbow part; and S4, calculating the minimum value of the additional stress generated by slug flow impact. According to the method, the minimum value of the additional stress generated by slug flow impact can be obtained, the additional stress can be