Analysis of pre-tightening sequence for bolt group of ten thousand ton tension machine
To improve the mechanical properties and reliability of ten thousand ton tension machine,the influence of seven different preload sequences on the connection properties of bolt sets was analyzed by Ansys software.Three indexes including residual bolt preloading,beam deformation,and average compressive stress of bolted joint surface are used to evaluate the different preloading sequences.The results show that for the residual preload of bolts,the best is sequence 3,followed by sequence 5.For the deformation of the beam,the best is sequence 1,and the standard deviation and range of the other sequences are basically the same.For the average compressive stress of the bolt joint surface,the best is sequence 3,followed by sequence 1.Based on the weighted average analysis of the three indexes,it is concluded that the weighted average score of sequence 3 is 9.958,which is the best sequence,and the order of preloading from both sides to the middle is obviously better than that from the middle to the two sides.This conclusion has important engineering value for the assembly of stretching machine.
ten thousand tontension machinereliabilityboltpre-loading sequences
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