Study On Optimization Theory And Application Of Ansys Program In Bridge Optimal Design

Structural Optimal Design is based on modern mathematical ,mechanical theory and numerical method, makes a study of structural design optimization and automatization.In recent years, with the popularity of ANSYS program, the Optimization Theory applied in cross-section optimization of bridge engineering andcable force optimization etc more and more, but the mathematical theory of the ANSYS optimization method also studied less.In this paper, Introduces several algorithm theory of current optimization algorithm in detail .Including the concept of optimal design, linear programming and nonlinear programming method, Gives their respective algorithm flow, establishs mathematical model of the rectangle section reinforced concrete simple-supported beam and optimazing used the mixed penalty function method, carries out the optimize cross-section analysis, to abtain the section size and reinforcement in the case of the lowest construction cost. On this basis, aiming at Subproblem Approximation Method and the First-order Optimization Method of ANSYS optimization, gives their optimization method and detailed mathematical principles.Finally,As an example to Daning River super large bridge optimization of stayed-buckle-cable forces of Constructed by Slanting Pull and Buckle Technique as an example, based on a single tension method, at a given level of asymmetry of cable tower, and arch rib adjacent segment elevation difference etc constraint condition, applied the zero-order optimization method of ANSYS, Carried out forward iterative optimization analysis of stayed-buckle-cable forces, has been able to ensure that the structure of status by force but also ensures linear arch rib with the design expectations of the cable force.