Power transmission iron tower rod element stress calculation method sufficiently considering elastic deformation of iron tower structure

The invention discloses a power transmission iron tower rod element stress calculation method sufficiently considering the elastic deformation of an iron tower structure. According to the method, firstly, a finite element method is used for building a finite element mechanical model of the iron tower structure; integral structure discretization is performed according to the iron tower structure composition; then, an element rigid matrix is generated on each element; an integral rigid matrix is generated in an overlapping way through combining the space angle relationship and the connection relationship among rod elements in the iron tower structure; next, a load array is generated according to a load received by an iron tower; a node displacement array is used as an unknown quantity to form a matrix equation with the integral rigidity matrix and the load array; finally, node strain is obtained through solving the matrix equation; and the stress of each rod element in the iron tower structure is finally obtained. The power transmission iron tower rod element stress is directly and precisely solved by a mathematical method; and the scientific basis can be provided for the safety evaluation of the iron tower structure.