Analysis on the Displacement of Heated Pipeline with Symmetry Overhead Structure by Thermal Expansion

Based on the theory of longitudinal bending beam, the paper analyzes the displacement and the internal force of heated pipeline with L type symmetry overhead structure in plane by thermal expansion, and the calculating problem of friction force between rack and pipeline. It also uses the dual substitution of such highly unlinear problem for the solution of linear equation, thus solving the problem of approximate explaination. The calculating examples have been listed too in the paper.