A bolt connection point stress optimization analysis method

The invention belongs to the technical field of electric power, and particularly relates to a bolt connection point stress optimization analysis method. The method comprises node stress optimization analysis in consideration of bolt pre-tightening force and node stress optimization analysis in consideration of ultimate bearing capacity. According to the method, the mechanical properties of 500kV power transmission line iron tower steel and weld joints under the low-temperature condition are studied, the change rule of the mechanical properties of bolt connection nodes with the temperature under the low-temperature condition is analyzed, and the influence rule of the machining process on the mechanical properties of the power transmission tower materials is analyzed; establishing a fine finite element model of the tower material component containing the bolt, researching the stress distribution condition on the tower material component, analyzing factors influencing the stress concentration, researching a meth