Abstract
The lower pressure rod of composite insulation cross arm of power transmission line pole tower is connected with the pole tower body and the coupling end joint respectively. The connection pattern on both ends of lower pressure rod are connected with slot type flash board, cross type flash board, U-shaped flash board, etc. The most frequently adopted one is connecting the cross type flash board on one end with the tower body, and connecting the slot type flash board on the other end with the joint of coupling end. The lower pressure rod of this pattern is that one end is axis connection while the other end is eccentric connection, and the calculation method for axial pressure bearing force is not suitable any longer. This paper conducts pressure test and finite element analysis on the solid composite material circular core rod member which is connected with cross type flash board on one end and slot type flash board on the other end, proposes the slenderness ratio correction coefficient of lower pressure rod of composite insulation cross arm of 220kV power transmission line pole tower, and provides basis for standardization of calculation method for bearing force of composite insulation cross arm pressure rod of power transmission iron tower.
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