In order to study the influence of position error of bolt hole on assembly mechanical characteristics

the error model and finite element model considering the position error were built

and the influences of position error on the connection stiffness and stress of bolt hole edge of single short precision bolted connection structure were studied. Computing model and finite model of position error of short precision bolt group were established

and the effects of assembly phases of two parts and assembly position of the 1st bolt on connection stiffness of short precision bolt group were analyzed. It was concluded that position error had a small influence on axial stiffness

and a significant effect on tangential stiffness. The projection of position error in the direction of tangential load was a major influencing factor to the tangential stiffness

and the stress of bolt hole edge reached the maximum at the position of 180°. By computing and comparing standard deviation of the projection and length of position error

three better assembly plans of bolts were obtained.