The Optimization Of Cable-stayed Space Truss

With the development of science and social progress, especially under the rapid development of computer, the demands of efficient design of optimization is increasingly urgent. After 40 years development, Structural optimization and design theory has been quite mature. Based on the ANSYS platform of Subproblem Approximation Method and First Order Optmization Method to the actual works as the background, the optimization of single-Pin cable-stayed space truss has been established, the contents was mainly in the following aspects:(1) It was systematically summed up the development and the engineering application of cable-stayed structure abroad and home, as well as the development and methods of technology of structural optimum design, therefor the optimization of cable-stayed space truss was significance and necessary.(2) The finite element model of cable-stayed space truss was established and the ways of pre-stressed introduced ,then compared with them to find which is suitable for cable-stayed space truss optimization . The optimization model of cable-stayed space truss was established (objective function, design variables, constraints) and the optimal design flow chart is determined.(3) Under the pre-stressed not exertd ,the sectional optimization model of the space truss was established, meeting the stress, displacement and other constraints to achieve the lightest weight of space truss which was economic and reliable.(4) Pre-stressed optimization methods was introduced , and it was established pre-stressed optimize model to find the reasonal value of cable , the internal forces and displacement analysised before and after the structure optimization .(5) Under the pre-stress exerted or not, it was given optimize model of highth of pylon tower to find the reasonal value of height ,and the influences of height of pylon tower were analysised.