Analysis of bolt load uniformity under convex flange connection
The study aims to optimize the uniformity of bolt preload by constructing elastic interaction models and optimizing the flange connection with convex surfaces.The elastic interaction coefficient method is extended to multiple tightening processes,and the initial preload of all bolts at each tightening step is predicted by the analytical model.A three-dimensional finite element model is established to verify its accuracy and explore the effects of tightening sequence and steps.The results show that the symmetric tightening method of three steps minimizes the elastic interaction and improves the uniformity of preload.The model considering elastic interaction further optimizes the uniformity,closer to the target value.This method effectively solves the problem of uneven preload and provides scientific basis for the safety and reliability design of bolt flange structures.
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维普
